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Pods/Masonry/LICENSE

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+Copyright (c) 2011-2012 Masonry Team - https://github.com/Masonry
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

Pods/Masonry/Masonry/MASCompositeConstraint.h

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+//
+//  MASCompositeConstraint.h
+//  Masonry
+//
+//  Created by Jonas Budelmann on 21/07/13.
+//  Copyright (c) 2013 cloudling. All rights reserved.
+//
+
+#import "MASConstraint.h"
+#import "MASUtilities.h"
+
+/**
+ *	A group of MASConstraint objects
+ */
+@interface MASCompositeConstraint : MASConstraint
+
+/**
+ *	Creates a composite with a predefined array of children
+ *
+ *	@param	children	child MASConstraints
+ *
+ *	@return	a composite constraint
+ */
+- (id)initWithChildren:(NSArray *)children;
+
+@end

Pods/Masonry/Masonry/MASCompositeConstraint.m

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+//
+//  MASCompositeConstraint.m
+//  Masonry
+//
+//  Created by Jonas Budelmann on 21/07/13.
+//  Copyright (c) 2013 cloudling. All rights reserved.
+//
+
+#import "MASCompositeConstraint.h"
+#import "MASConstraint+Private.h"
+
+@interface MASCompositeConstraint () <MASConstraintDelegate>
+
+@property (nonatomic, strong) id mas_key;
+@property (nonatomic, strong) NSMutableArray *childConstraints;
+
+@end
+
+@implementation MASCompositeConstraint
+
+- (id)initWithChildren:(NSArray *)children {
+    self = [super init];
+    if (!self) return nil;
+
+    _childConstraints = [children mutableCopy];
+    for (MASConstraint *constraint in _childConstraints) {
+        constraint.delegate = self;
+    }
+
+    return self;
+}
+
+#pragma mark - MASConstraintDelegate
+
+- (void)constraint:(MASConstraint *)constraint shouldBeReplacedWithConstraint:(MASConstraint *)replacementConstraint {
+    NSUInteger index = [self.childConstraints indexOfObject:constraint];
+    NSAssert(index != NSNotFound, @"Could not find constraint %@", constraint);
+    [self.childConstraints replaceObjectAtIndex:index withObject:replacementConstraint];
+}
+
+- (MASConstraint *)constraint:(MASConstraint __unused *)constraint addConstraintWithLayoutAttribute:(NSLayoutAttribute)layoutAttribute {
+    id<MASConstraintDelegate> strongDelegate = self.delegate;
+    MASConstraint *newConstraint = [strongDelegate constraint:self addConstraintWithLayoutAttribute:layoutAttribute];
+    newConstraint.delegate = self;
+    [self.childConstraints addObject:newConstraint];
+    return newConstraint;
+}
+
+#pragma mark - NSLayoutConstraint multiplier proxies 
+
+- (MASConstraint * (^)(CGFloat))multipliedBy {
+    return ^id(CGFloat multiplier) {
+        for (MASConstraint *constraint in self.childConstraints) {
+            constraint.multipliedBy(multiplier);
+        }
+        return self;
+    };
+}
+
+- (MASConstraint * (^)(CGFloat))dividedBy {
+    return ^id(CGFloat divider) {
+        for (MASConstraint *constraint in self.childConstraints) {
+            constraint.dividedBy(divider);
+        }
+        return self;
+    };
+}
+
+#pragma mark - MASLayoutPriority proxy
+
+- (MASConstraint * (^)(MASLayoutPriority))priority {
+    return ^id(MASLayoutPriority priority) {
+        for (MASConstraint *constraint in self.childConstraints) {
+            constraint.priority(priority);
+        }
+        return self;
+    };
+}
+
+#pragma mark - NSLayoutRelation proxy
+
+- (MASConstraint * (^)(id, NSLayoutRelation))equalToWithRelation {
+    return ^id(id attr, NSLayoutRelation relation) {
+        for (MASConstraint *constraint in self.childConstraints.copy) {
+            constraint.equalToWithRelation(attr, relation);
+        }
+        return self;
+    };
+}
+
+#pragma mark - attribute chaining
+
+- (MASConstraint *)addConstraintWithLayoutAttribute:(NSLayoutAttribute)layoutAttribute {
+    [self constraint:self addConstraintWithLayoutAttribute:layoutAttribute];
+    return self;
+}
+
+#pragma mark - Animator proxy
+
+#if TARGET_OS_MAC && !(TARGET_OS_IPHONE || TARGET_OS_TV)
+
+- (MASConstraint *)animator {
+    for (MASConstraint *constraint in self.childConstraints) {
+        [constraint animator];
+    }
+    return self;
+}
+
+#endif
+
+#pragma mark - debug helpers
+
+- (MASConstraint * (^)(id))key {
+    return ^id(id key) {
+        self.mas_key = key;
+        int i = 0;
+        for (MASConstraint *constraint in self.childConstraints) {
+            constraint.key([NSString stringWithFormat:@"%@[%d]", key, i++]);
+        }
+        return self;
+    };
+}
+
+#pragma mark - NSLayoutConstraint constant setters
+
+- (void)setInsets:(MASEdgeInsets)insets {
+    for (MASConstraint *constraint in self.childConstraints) {
+        constraint.insets = insets;
+    }
+}
+
+- (void)setInset:(CGFloat)inset {
+    for (MASConstraint *constraint in self.childConstraints) {
+        constraint.inset = inset;
+    }
+}
+
+- (void)setOffset:(CGFloat)offset {
+    for (MASConstraint *constraint in self.childConstraints) {
+        constraint.offset = offset;
+    }
+}
+
+- (void)setSizeOffset:(CGSize)sizeOffset {
+    for (MASConstraint *constraint in self.childConstraints) {
+        constraint.sizeOffset = sizeOffset;
+    }
+}
+
+- (void)setCenterOffset:(CGPoint)centerOffset {
+    for (MASConstraint *constraint in self.childConstraints) {
+        constraint.centerOffset = centerOffset;
+    }
+}
+
+#pragma mark - MASConstraint
+
+- (void)activate {
+    for (MASConstraint *constraint in self.childConstraints) {
+        [constraint activate];
+    }
+}
+
+- (void)deactivate {
+    for (MASConstraint *constraint in self.childConstraints) {
+        [constraint deactivate];
+    }
+}
+
+- (void)install {
+    for (MASConstraint *constraint in self.childConstraints) {
+        constraint.updateExisting = self.updateExisting;
+        [constraint install];
+    }
+}
+
+- (void)uninstall {
+    for (MASConstraint *constraint in self.childConstraints) {
+        [constraint uninstall];
+    }
+}
+
+@end

Pods/Masonry/Masonry/MASConstraint+Private.h

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+//
+//  MASConstraint+Private.h
+//  Masonry
+//
+//  Created by Nick Tymchenko on 29/04/14.
+//  Copyright (c) 2014 cloudling. All rights reserved.
+//
+
+#import "MASConstraint.h"
+
+@protocol MASConstraintDelegate;
+
+
+@interface MASConstraint ()
+
+/**
+ *  Whether or not to check for an existing constraint instead of adding constraint
+ */
+@property (nonatomic, assign) BOOL updateExisting;
+
+/**
+ *	Usually MASConstraintMaker but could be a parent MASConstraint
+ */
+@property (nonatomic, weak) id<MASConstraintDelegate> delegate;
+
+/**
+ *  Based on a provided value type, is equal to calling:
+ *  NSNumber - setOffset:
+ *  NSValue with CGPoint - setPointOffset:
+ *  NSValue with CGSize - setSizeOffset:
+ *  NSValue with MASEdgeInsets - setInsets:
+ */
+- (void)setLayoutConstantWithValue:(NSValue *)value;
+
+@end
+
+
+@interface MASConstraint (Abstract)
+
+/**
+ *	Sets the constraint relation to given NSLayoutRelation
+ *  returns a block which accepts one of the following:
+ *    MASViewAttribute, UIView, NSValue, NSArray
+ *  see readme for more details.
+ */
+- (MASConstraint * (^)(id, NSLayoutRelation))equalToWithRelation;
+
+/**
+ *	Override to set a custom chaining behaviour
+ */
+- (MASConstraint *)addConstraintWithLayoutAttribute:(NSLayoutAttribute)layoutAttribute;
+
+@end
+
+
+@protocol MASConstraintDelegate <NSObject>
+
+/**
+ *	Notifies the delegate when the constraint needs to be replaced with another constraint. For example
+ *  A MASViewConstraint may turn into a MASCompositeConstraint when an array is passed to one of the equality blocks
+ */
+- (void)constraint:(MASConstraint *)constraint shouldBeReplacedWithConstraint:(MASConstraint *)replacementConstraint;
+
+- (MASConstraint *)constraint:(MASConstraint *)constraint addConstraintWithLayoutAttribute:(NSLayoutAttribute)layoutAttribute;
+
+@end

Pods/Masonry/Masonry/MASConstraint.h

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+//
+//  MASConstraint.h
+//  Masonry
+//
+//  Created by Jonas Budelmann on 22/07/13.
+//  Copyright (c) 2013 cloudling. All rights reserved.
+//
+
+#import "MASUtilities.h"
+
+/**
+ *	Enables Constraints to be created with chainable syntax
+ *  Constraint can represent single NSLayoutConstraint (MASViewConstraint) 
+ *  or a group of NSLayoutConstraints (MASComposisteConstraint)
+ */
+@interface MASConstraint : NSObject
+
+// Chaining Support
+
+/**
+ *	Modifies the NSLayoutConstraint constant,
+ *  only affects MASConstraints in which the first item's NSLayoutAttribute is one of the following
+ *  NSLayoutAttributeTop, NSLayoutAttributeLeft, NSLayoutAttributeBottom, NSLayoutAttributeRight
+ */
+- (MASConstraint * (^)(MASEdgeInsets insets))insets;
+
+/**
+ *	Modifies the NSLayoutConstraint constant,
+ *  only affects MASConstraints in which the first item's NSLayoutAttribute is one of the following
+ *  NSLayoutAttributeTop, NSLayoutAttributeLeft, NSLayoutAttributeBottom, NSLayoutAttributeRight
+ */
+- (MASConstraint * (^)(CGFloat inset))inset;
+
+/**
+ *	Modifies the NSLayoutConstraint constant,
+ *  only affects MASConstraints in which the first item's NSLayoutAttribute is one of the following
+ *  NSLayoutAttributeWidth, NSLayoutAttributeHeight
+ */
+- (MASConstraint * (^)(CGSize offset))sizeOffset;
+
+/**
+ *	Modifies the NSLayoutConstraint constant,
+ *  only affects MASConstraints in which the first item's NSLayoutAttribute is one of the following
+ *  NSLayoutAttributeCenterX, NSLayoutAttributeCenterY
+ */
+- (MASConstraint * (^)(CGPoint offset))centerOffset;
+
+/**
+ *	Modifies the NSLayoutConstraint constant
+ */
+- (MASConstraint * (^)(CGFloat offset))offset;
+
+/**
+ *  Modifies the NSLayoutConstraint constant based on a value type
+ */
+- (MASConstraint * (^)(NSValue *value))valueOffset;
+
+/**
+ *	Sets the NSLayoutConstraint multiplier property
+ */
+- (MASConstraint * (^)(CGFloat multiplier))multipliedBy;
+
+/**
+ *	Sets the NSLayoutConstraint multiplier to 1.0/dividedBy
+ */
+- (MASConstraint * (^)(CGFloat divider))dividedBy;
+
+/**
+ *	Sets the NSLayoutConstraint priority to a float or MASLayoutPriority
+ */
+- (MASConstraint * (^)(MASLayoutPriority priority))priority;
+
+/**
+ *	Sets the NSLayoutConstraint priority to MASLayoutPriorityLow
+ */
+- (MASConstraint * (^)(void))priorityLow;
+
+/**
+ *	Sets the NSLayoutConstraint priority to MASLayoutPriorityMedium
+ */
+- (MASConstraint * (^)(void))priorityMedium;
+
+/**
+ *	Sets the NSLayoutConstraint priority to MASLayoutPriorityHigh
+ */
+- (MASConstraint * (^)(void))priorityHigh;
+
+/**
+ *	Sets the constraint relation to NSLayoutRelationEqual
+ *  returns a block which accepts one of the following:
+ *    MASViewAttribute, UIView, NSValue, NSArray
+ *  see readme for more details.
+ */
+- (MASConstraint * (^)(id attr))equalTo;
+
+/**
+ *	Sets the constraint relation to NSLayoutRelationGreaterThanOrEqual
+ *  returns a block which accepts one of the following:
+ *    MASViewAttribute, UIView, NSValue, NSArray
+ *  see readme for more details.
+ */
+- (MASConstraint * (^)(id attr))greaterThanOrEqualTo;
+
+/**
+ *	Sets the constraint relation to NSLayoutRelationLessThanOrEqual
+ *  returns a block which accepts one of the following:
+ *    MASViewAttribute, UIView, NSValue, NSArray
+ *  see readme for more details.
+ */
+- (MASConstraint * (^)(id attr))lessThanOrEqualTo;
+
+/**
+ *	Optional semantic property which has no effect but improves the readability of constraint
+ */
+- (MASConstraint *)with;
+
+/**
+ *	Optional semantic property which has no effect but improves the readability of constraint
+ */
+- (MASConstraint *)and;
+
+/**
+ *	Creates a new MASCompositeConstraint with the called attribute and reciever
+ */
+- (MASConstraint *)left;
+- (MASConstraint *)top;
+- (MASConstraint *)right;
+- (MASConstraint *)bottom;
+- (MASConstraint *)leading;
+- (MASConstraint *)trailing;
+- (MASConstraint *)width;
+- (MASConstraint *)height;
+- (MASConstraint *)centerX;
+- (MASConstraint *)centerY;
+- (MASConstraint *)baseline;
+
+#if (__IPHONE_OS_VERSION_MIN_REQUIRED >= 80000) || (__TV_OS_VERSION_MIN_REQUIRED >= 9000) || (__MAC_OS_X_VERSION_MIN_REQUIRED >= 101100)
+
+- (MASConstraint *)firstBaseline;
+- (MASConstraint *)lastBaseline;
+
+#endif
+
+#if (__IPHONE_OS_VERSION_MIN_REQUIRED >= 80000) || (__TV_OS_VERSION_MIN_REQUIRED >= 9000)
+
+- (MASConstraint *)leftMargin;
+- (MASConstraint *)rightMargin;
+- (MASConstraint *)topMargin;
+- (MASConstraint *)bottomMargin;
+- (MASConstraint *)leadingMargin;
+- (MASConstraint *)trailingMargin;
+- (MASConstraint *)centerXWithinMargins;
+- (MASConstraint *)centerYWithinMargins;
+
+#endif
+
+
+/**
+ *	Sets the constraint debug name
+ */
+- (MASConstraint * (^)(id key))key;
+
+// NSLayoutConstraint constant Setters
+// for use outside of mas_updateConstraints/mas_makeConstraints blocks
+
+/**
+ *	Modifies the NSLayoutConstraint constant,
+ *  only affects MASConstraints in which the first item's NSLayoutAttribute is one of the following
+ *  NSLayoutAttributeTop, NSLayoutAttributeLeft, NSLayoutAttributeBottom, NSLayoutAttributeRight
+ */
+- (void)setInsets:(MASEdgeInsets)insets;
+
+/**
+ *	Modifies the NSLayoutConstraint constant,
+ *  only affects MASConstraints in which the first item's NSLayoutAttribute is one of the following
+ *  NSLayoutAttributeTop, NSLayoutAttributeLeft, NSLayoutAttributeBottom, NSLayoutAttributeRight
+ */
+- (void)setInset:(CGFloat)inset;
+
+/**
+ *	Modifies the NSLayoutConstraint constant,
+ *  only affects MASConstraints in which the first item's NSLayoutAttribute is one of the following
+ *  NSLayoutAttributeWidth, NSLayoutAttributeHeight
+ */
+- (void)setSizeOffset:(CGSize)sizeOffset;
+
+/**
+ *	Modifies the NSLayoutConstraint constant,
+ *  only affects MASConstraints in which the first item's NSLayoutAttribute is one of the following
+ *  NSLayoutAttributeCenterX, NSLayoutAttributeCenterY
+ */
+- (void)setCenterOffset:(CGPoint)centerOffset;
+
+/**
+ *	Modifies the NSLayoutConstraint constant
+ */
+- (void)setOffset:(CGFloat)offset;
+
+
+// NSLayoutConstraint Installation support
+
+#if TARGET_OS_MAC && !(TARGET_OS_IPHONE || TARGET_OS_TV)
+/**
+ *  Whether or not to go through the animator proxy when modifying the constraint
+ */
+@property (nonatomic, copy, readonly) MASConstraint *animator;
+#endif
+
+/**
+ *  Activates an NSLayoutConstraint if it's supported by an OS. 
+ *  Invokes install otherwise.
+ */
+- (void)activate;
+
+/**
+ *  Deactivates previously installed/activated NSLayoutConstraint.
+ */
+- (void)deactivate;
+
+/**
+ *	Creates a NSLayoutConstraint and adds it to the appropriate view.
+ */
+- (void)install;
+
+/**
+ *	Removes previously installed NSLayoutConstraint
+ */
+- (void)uninstall;
+
+@end
+
+
+/**
+ *  Convenience auto-boxing macros for MASConstraint methods.
+ *
+ *  Defining MAS_SHORTHAND_GLOBALS will turn on auto-boxing for default syntax.
+ *  A potential drawback of this is that the unprefixed macros will appear in global scope.
+ */
+#define mas_equalTo(...)                 equalTo(MASBoxValue((__VA_ARGS__)))
+#define mas_greaterThanOrEqualTo(...)    greaterThanOrEqualTo(MASBoxValue((__VA_ARGS__)))
+#define mas_lessThanOrEqualTo(...)       lessThanOrEqualTo(MASBoxValue((__VA_ARGS__)))
+
+#define mas_offset(...)                  valueOffset(MASBoxValue((__VA_ARGS__)))
+
+
+#ifdef MAS_SHORTHAND_GLOBALS
+
+#define equalTo(...)                     mas_equalTo(__VA_ARGS__)
+#define greaterThanOrEqualTo(...)        mas_greaterThanOrEqualTo(__VA_ARGS__)
+#define lessThanOrEqualTo(...)           mas_lessThanOrEqualTo(__VA_ARGS__)
+
+#define offset(...)                      mas_offset(__VA_ARGS__)
+
+#endif
+
+
+@interface MASConstraint (AutoboxingSupport)
+
+/**
+ *  Aliases to corresponding relation methods (for shorthand macros)
+ *  Also needed to aid autocompletion
+ */
+- (MASConstraint * (^)(id attr))mas_equalTo;
+- (MASConstraint * (^)(id attr))mas_greaterThanOrEqualTo;
+- (MASConstraint * (^)(id attr))mas_lessThanOrEqualTo;
+
+/**
+ *  A dummy method to aid autocompletion
+ */
+- (MASConstraint * (^)(id offset))mas_offset;
+
+@end

Pods/Masonry/Masonry/MASConstraint.m

@@ -0,0 +1,301 @@
+//
+//  MASConstraint.m
+//  Masonry
+//
+//  Created by Nick Tymchenko on 1/20/14.
+//
+
+#import "MASConstraint.h"
+#import "MASConstraint+Private.h"
+
+#define MASMethodNotImplemented() \
+    @throw [NSException exceptionWithName:NSInternalInconsistencyException \
+                                   reason:[NSString stringWithFormat:@"You must override %@ in a subclass.", NSStringFromSelector(_cmd)] \
+                                 userInfo:nil]
+
+@implementation MASConstraint
+
+#pragma mark - Init
+
+- (id)init {
+	NSAssert(![self isMemberOfClass:[MASConstraint class]], @"MASConstraint is an abstract class, you should not instantiate it directly.");
+	return [super init];
+}
+
+#pragma mark - NSLayoutRelation proxies
+
+- (MASConstraint * (^)(id))equalTo {
+    return ^id(id attribute) {
+        return self.equalToWithRelation(attribute, NSLayoutRelationEqual);
+    };
+}
+
+- (MASConstraint * (^)(id))mas_equalTo {
+    return ^id(id attribute) {
+        return self.equalToWithRelation(attribute, NSLayoutRelationEqual);
+    };
+}
+
+- (MASConstraint * (^)(id))greaterThanOrEqualTo {
+    return ^id(id attribute) {
+        return self.equalToWithRelation(attribute, NSLayoutRelationGreaterThanOrEqual);
+    };
+}
+
+- (MASConstraint * (^)(id))mas_greaterThanOrEqualTo {
+    return ^id(id attribute) {
+        return self.equalToWithRelation(attribute, NSLayoutRelationGreaterThanOrEqual);
+    };
+}
+
+- (MASConstraint * (^)(id))lessThanOrEqualTo {
+    return ^id(id attribute) {
+        return self.equalToWithRelation(attribute, NSLayoutRelationLessThanOrEqual);
+    };
+}
+
+- (MASConstraint * (^)(id))mas_lessThanOrEqualTo {
+    return ^id(id attribute) {
+        return self.equalToWithRelation(attribute, NSLayoutRelationLessThanOrEqual);
+    };
+}
+
+#pragma mark - MASLayoutPriority proxies
+
+- (MASConstraint * (^)(void))priorityLow {
+    return ^id{
+        self.priority(MASLayoutPriorityDefaultLow);
+        return self;
+    };
+}
+
+- (MASConstraint * (^)(void))priorityMedium {
+    return ^id{
+        self.priority(MASLayoutPriorityDefaultMedium);
+        return self;
+    };
+}
+
+- (MASConstraint * (^)(void))priorityHigh {
+    return ^id{
+        self.priority(MASLayoutPriorityDefaultHigh);
+        return self;
+    };
+}
+
+#pragma mark - NSLayoutConstraint constant proxies
+
+- (MASConstraint * (^)(MASEdgeInsets))insets {
+    return ^id(MASEdgeInsets insets){
+        self.insets = insets;
+        return self;
+    };
+}
+
+- (MASConstraint * (^)(CGFloat))inset {
+    return ^id(CGFloat inset){
+        self.inset = inset;
+        return self;
+    };
+}
+
+- (MASConstraint * (^)(CGSize))sizeOffset {
+    return ^id(CGSize offset) {
+        self.sizeOffset = offset;
+        return self;
+    };
+}
+
+- (MASConstraint * (^)(CGPoint))centerOffset {
+    return ^id(CGPoint offset) {
+        self.centerOffset = offset;
+        return self;
+    };
+}
+
+- (MASConstraint * (^)(CGFloat))offset {
+    return ^id(CGFloat offset){
+        self.offset = offset;
+        return self;
+    };
+}
+
+- (MASConstraint * (^)(NSValue *value))valueOffset {
+    return ^id(NSValue *offset) {
+        NSAssert([offset isKindOfClass:NSValue.class], @"expected an NSValue offset, got: %@", offset);
+        [self setLayoutConstantWithValue:offset];
+        return self;
+    };
+}
+
+- (MASConstraint * (^)(id offset))mas_offset {
+    // Will never be called due to macro
+    return nil;
+}
+
+#pragma mark - NSLayoutConstraint constant setter
+
+- (void)setLayoutConstantWithValue:(NSValue *)value {
+    if ([value isKindOfClass:NSNumber.class]) {
+        self.offset = [(NSNumber *)value doubleValue];
+    } else if (strcmp(value.objCType, @encode(CGPoint)) == 0) {
+        CGPoint point;
+        [value getValue:&point];
+        self.centerOffset = point;
+    } else if (strcmp(value.objCType, @encode(CGSize)) == 0) {
+        CGSize size;
+        [value getValue:&size];
+        self.sizeOffset = size;
+    } else if (strcmp(value.objCType, @encode(MASEdgeInsets)) == 0) {
+        MASEdgeInsets insets;
+        [value getValue:&insets];
+        self.insets = insets;
+    } else {
+        NSAssert(NO, @"attempting to set layout constant with unsupported value: %@", value);
+    }
+}
+
+#pragma mark - Semantic properties
+
+- (MASConstraint *)with {
+    return self;
+}
+
+- (MASConstraint *)and {
+    return self;
+}
+
+#pragma mark - Chaining
+
+- (MASConstraint *)addConstraintWithLayoutAttribute:(NSLayoutAttribute __unused)layoutAttribute {
+    MASMethodNotImplemented();
+}
+
+- (MASConstraint *)left {
+    return [self addConstraintWithLayoutAttribute:NSLayoutAttributeLeft];
+}
+
+- (MASConstraint *)top {
+    return [self addConstraintWithLayoutAttribute:NSLayoutAttributeTop];
+}
+
+- (MASConstraint *)right {
+    return [self addConstraintWithLayoutAttribute:NSLayoutAttributeRight];
+}
+
+- (MASConstraint *)bottom {
+    return [self addConstraintWithLayoutAttribute:NSLayoutAttributeBottom];
+}
+
+- (MASConstraint *)leading {
+    return [self addConstraintWithLayoutAttribute:NSLayoutAttributeLeading];
+}
+
+- (MASConstraint *)trailing {
+    return [self addConstraintWithLayoutAttribute:NSLayoutAttributeTrailing];
+}
+
+- (MASConstraint *)width {
+    return [self addConstraintWithLayoutAttribute:NSLayoutAttributeWidth];
+}
+
+- (MASConstraint *)height {
+    return [self addConstraintWithLayoutAttribute:NSLayoutAttributeHeight];
+}
+
+- (MASConstraint *)centerX {
+    return [self addConstraintWithLayoutAttribute:NSLayoutAttributeCenterX];
+}
+
+- (MASConstraint *)centerY {
+    return [self addConstraintWithLayoutAttribute:NSLayoutAttributeCenterY];
+}
+
+- (MASConstraint *)baseline {
+    return [self addConstraintWithLayoutAttribute:NSLayoutAttributeBaseline];
+}
+
+#if (__IPHONE_OS_VERSION_MIN_REQUIRED >= 80000) || (__TV_OS_VERSION_MIN_REQUIRED >= 9000) || (__MAC_OS_X_VERSION_MIN_REQUIRED >= 101100)
+
+- (MASConstraint *)firstBaseline {
+    return [self addConstraintWithLayoutAttribute:NSLayoutAttributeFirstBaseline];
+}
+- (MASConstraint *)lastBaseline {
+    return [self addConstraintWithLayoutAttribute:NSLayoutAttributeLastBaseline];
+}
+
+#endif
+
+#if (__IPHONE_OS_VERSION_MIN_REQUIRED >= 80000) || (__TV_OS_VERSION_MIN_REQUIRED >= 9000)
+
+- (MASConstraint *)leftMargin {
+    return [self addConstraintWithLayoutAttribute:NSLayoutAttributeLeftMargin];
+}
+
+- (MASConstraint *)rightMargin {
+    return [self addConstraintWithLayoutAttribute:NSLayoutAttributeRightMargin];
+}
+
+- (MASConstraint *)topMargin {
+    return [self addConstraintWithLayoutAttribute:NSLayoutAttributeTopMargin];
+}
+
+- (MASConstraint *)bottomMargin {
+    return [self addConstraintWithLayoutAttribute:NSLayoutAttributeBottomMargin];
+}
+
+- (MASConstraint *)leadingMargin {
+    return [self addConstraintWithLayoutAttribute:NSLayoutAttributeLeadingMargin];
+}
+
+- (MASConstraint *)trailingMargin {
+    return [self addConstraintWithLayoutAttribute:NSLayoutAttributeTrailingMargin];
+}
+
+- (MASConstraint *)centerXWithinMargins {
+    return [self addConstraintWithLayoutAttribute:NSLayoutAttributeCenterXWithinMargins];
+}
+
+- (MASConstraint *)centerYWithinMargins {
+    return [self addConstraintWithLayoutAttribute:NSLayoutAttributeCenterYWithinMargins];
+}
+
+#endif
+
+#pragma mark - Abstract
+
+- (MASConstraint * (^)(CGFloat multiplier))multipliedBy { MASMethodNotImplemented(); }
+
+- (MASConstraint * (^)(CGFloat divider))dividedBy { MASMethodNotImplemented(); }
+
+- (MASConstraint * (^)(MASLayoutPriority priority))priority { MASMethodNotImplemented(); }
+
+- (MASConstraint * (^)(id, NSLayoutRelation))equalToWithRelation { MASMethodNotImplemented(); }
+
+- (MASConstraint * (^)(id key))key { MASMethodNotImplemented(); }
+
+- (void)setInsets:(MASEdgeInsets __unused)insets { MASMethodNotImplemented(); }
+
+- (void)setInset:(CGFloat __unused)inset { MASMethodNotImplemented(); }
+
+- (void)setSizeOffset:(CGSize __unused)sizeOffset { MASMethodNotImplemented(); }
+
+- (void)setCenterOffset:(CGPoint __unused)centerOffset { MASMethodNotImplemented(); }
+
+- (void)setOffset:(CGFloat __unused)offset { MASMethodNotImplemented(); }
+
+#if TARGET_OS_MAC && !(TARGET_OS_IPHONE || TARGET_OS_TV)
+
+- (MASConstraint *)animator { MASMethodNotImplemented(); }
+
+#endif
+
+- (void)activate { MASMethodNotImplemented(); }
+
+- (void)deactivate { MASMethodNotImplemented(); }
+
+- (void)install { MASMethodNotImplemented(); }
+
+- (void)uninstall { MASMethodNotImplemented(); }
+
+@end

Pods/Masonry/Masonry/MASConstraintMaker.h

@@ -0,0 +1,146 @@
+//
+//  MASConstraintMaker.h
+//  Masonry
+//
+//  Created by Jonas Budelmann on 20/07/13.
+//  Copyright (c) 2013 cloudling. All rights reserved.
+//
+
+#import "MASConstraint.h"
+#import "MASUtilities.h"
+
+typedef NS_OPTIONS(NSInteger, MASAttribute) {
+    MASAttributeLeft = 1 << NSLayoutAttributeLeft,
+    MASAttributeRight = 1 << NSLayoutAttributeRight,
+    MASAttributeTop = 1 << NSLayoutAttributeTop,
+    MASAttributeBottom = 1 << NSLayoutAttributeBottom,
+    MASAttributeLeading = 1 << NSLayoutAttributeLeading,
+    MASAttributeTrailing = 1 << NSLayoutAttributeTrailing,
+    MASAttributeWidth = 1 << NSLayoutAttributeWidth,
+    MASAttributeHeight = 1 << NSLayoutAttributeHeight,
+    MASAttributeCenterX = 1 << NSLayoutAttributeCenterX,
+    MASAttributeCenterY = 1 << NSLayoutAttributeCenterY,
+    MASAttributeBaseline = 1 << NSLayoutAttributeBaseline,
+    
+#if (__IPHONE_OS_VERSION_MIN_REQUIRED >= 80000) || (__TV_OS_VERSION_MIN_REQUIRED >= 9000) || (__MAC_OS_X_VERSION_MIN_REQUIRED >= 101100)
+    
+    MASAttributeFirstBaseline = 1 << NSLayoutAttributeFirstBaseline,
+    MASAttributeLastBaseline = 1 << NSLayoutAttributeLastBaseline,
+    
+#endif
+    
+#if (__IPHONE_OS_VERSION_MIN_REQUIRED >= 80000) || (__TV_OS_VERSION_MIN_REQUIRED >= 9000)
+    
+    MASAttributeLeftMargin = 1 << NSLayoutAttributeLeftMargin,
+    MASAttributeRightMargin = 1 << NSLayoutAttributeRightMargin,
+    MASAttributeTopMargin = 1 << NSLayoutAttributeTopMargin,
+    MASAttributeBottomMargin = 1 << NSLayoutAttributeBottomMargin,
+    MASAttributeLeadingMargin = 1 << NSLayoutAttributeLeadingMargin,
+    MASAttributeTrailingMargin = 1 << NSLayoutAttributeTrailingMargin,
+    MASAttributeCenterXWithinMargins = 1 << NSLayoutAttributeCenterXWithinMargins,
+    MASAttributeCenterYWithinMargins = 1 << NSLayoutAttributeCenterYWithinMargins,
+
+#endif
+    
+};
+
+/**
+ *  Provides factory methods for creating MASConstraints.
+ *  Constraints are collected until they are ready to be installed
+ *
+ */
+@interface MASConstraintMaker : NSObject
+
+/**
+ *	The following properties return a new MASViewConstraint
+ *  with the first item set to the makers associated view and the appropriate MASViewAttribute
+ */
+@property (nonatomic, strong, readonly) MASConstraint *left;
+@property (nonatomic, strong, readonly) MASConstraint *top;
+@property (nonatomic, strong, readonly) MASConstraint *right;
+@property (nonatomic, strong, readonly) MASConstraint *bottom;
+@property (nonatomic, strong, readonly) MASConstraint *leading;
+@property (nonatomic, strong, readonly) MASConstraint *trailing;
+@property (nonatomic, strong, readonly) MASConstraint *width;
+@property (nonatomic, strong, readonly) MASConstraint *height;
+@property (nonatomic, strong, readonly) MASConstraint *centerX;
+@property (nonatomic, strong, readonly) MASConstraint *centerY;
+@property (nonatomic, strong, readonly) MASConstraint *baseline;
+
+#if (__IPHONE_OS_VERSION_MIN_REQUIRED >= 80000) || (__TV_OS_VERSION_MIN_REQUIRED >= 9000) || (__MAC_OS_X_VERSION_MIN_REQUIRED >= 101100)
+
+@property (nonatomic, strong, readonly) MASConstraint *firstBaseline;
+@property (nonatomic, strong, readonly) MASConstraint *lastBaseline;
+
+#endif
+
+#if (__IPHONE_OS_VERSION_MIN_REQUIRED >= 80000) || (__TV_OS_VERSION_MIN_REQUIRED >= 9000)
+
+@property (nonatomic, strong, readonly) MASConstraint *leftMargin;
+@property (nonatomic, strong, readonly) MASConstraint *rightMargin;
+@property (nonatomic, strong, readonly) MASConstraint *topMargin;
+@property (nonatomic, strong, readonly) MASConstraint *bottomMargin;
+@property (nonatomic, strong, readonly) MASConstraint *leadingMargin;
+@property (nonatomic, strong, readonly) MASConstraint *trailingMargin;
+@property (nonatomic, strong, readonly) MASConstraint *centerXWithinMargins;
+@property (nonatomic, strong, readonly) MASConstraint *centerYWithinMargins;
+
+#endif
+
+/**
+ *  Returns a block which creates a new MASCompositeConstraint with the first item set
+ *  to the makers associated view and children corresponding to the set bits in the
+ *  MASAttribute parameter. Combine multiple attributes via binary-or.
+ */
+@property (nonatomic, strong, readonly) MASConstraint *(^attributes)(MASAttribute attrs);
+
+/**
+ *	Creates a MASCompositeConstraint with type MASCompositeConstraintTypeEdges
+ *  which generates the appropriate MASViewConstraint children (top, left, bottom, right)
+ *  with the first item set to the makers associated view
+ */
+@property (nonatomic, strong, readonly) MASConstraint *edges;
+
+/**
+ *	Creates a MASCompositeConstraint with type MASCompositeConstraintTypeSize
+ *  which generates the appropriate MASViewConstraint children (width, height)
+ *  with the first item set to the makers associated view
+ */
+@property (nonatomic, strong, readonly) MASConstraint *size;
+
+/**
+ *	Creates a MASCompositeConstraint with type MASCompositeConstraintTypeCenter
+ *  which generates the appropriate MASViewConstraint children (centerX, centerY)
+ *  with the first item set to the makers associated view
+ */
+@property (nonatomic, strong, readonly) MASConstraint *center;
+
+/**
+ *  Whether or not to check for an existing constraint instead of adding constraint
+ */
+@property (nonatomic, assign) BOOL updateExisting;
+
+/**
+ *  Whether or not to remove existing constraints prior to installing
+ */
+@property (nonatomic, assign) BOOL removeExisting;
+
+/**
+ *	initialises the maker with a default view
+ *
+ *	@param	view	any MASConstraint are created with this view as the first item
+ *
+ *	@return	a new MASConstraintMaker
+ */
+- (id)initWithView:(MAS_VIEW *)view;
+
+/**
+ *	Calls install method on any MASConstraints which have been created by this maker
+ *
+ *	@return	an array of all the installed MASConstraints
+ */
+- (NSArray *)install;
+
+- (MASConstraint * (^)(dispatch_block_t))group;
+
+@end

Pods/Masonry/Masonry/MASConstraintMaker.m

@@ -0,0 +1,273 @@
+//
+//  MASConstraintMaker.m
+//  Masonry
+//
+//  Created by Jonas Budelmann on 20/07/13.
+//  Copyright (c) 2013 cloudling. All rights reserved.
+//
+
+#import "MASConstraintMaker.h"
+#import "MASViewConstraint.h"
+#import "MASCompositeConstraint.h"
+#import "MASConstraint+Private.h"
+#import "MASViewAttribute.h"
+#import "View+MASAdditions.h"
+
+@interface MASConstraintMaker () <MASConstraintDelegate>
+
+@property (nonatomic, weak) MAS_VIEW *view;
+@property (nonatomic, strong) NSMutableArray *constraints;
+
+@end
+
+@implementation MASConstraintMaker
+
+- (id)initWithView:(MAS_VIEW *)view {
+    self = [super init];
+    if (!self) return nil;
+    
+    self.view = view;
+    self.constraints = NSMutableArray.new;
+    
+    return self;
+}
+
+- (NSArray *)install {
+    if (self.removeExisting) {
+        NSArray *installedConstraints = [MASViewConstraint installedConstraintsForView:self.view];
+        for (MASConstraint *constraint in installedConstraints) {
+            [constraint uninstall];
+        }
+    }
+    NSArray *constraints = self.constraints.copy;
+    for (MASConstraint *constraint in constraints) {
+        constraint.updateExisting = self.updateExisting;
+        [constraint install];
+    }
+    [self.constraints removeAllObjects];
+    return constraints;
+}
+
+#pragma mark - MASConstraintDelegate
+
+- (void)constraint:(MASConstraint *)constraint shouldBeReplacedWithConstraint:(MASConstraint *)replacementConstraint {
+    NSUInteger index = [self.constraints indexOfObject:constraint];
+    NSAssert(index != NSNotFound, @"Could not find constraint %@", constraint);
+    [self.constraints replaceObjectAtIndex:index withObject:replacementConstraint];
+}
+
+- (MASConstraint *)constraint:(MASConstraint *)constraint addConstraintWithLayoutAttribute:(NSLayoutAttribute)layoutAttribute {
+    MASViewAttribute *viewAttribute = [[MASViewAttribute alloc] initWithView:self.view layoutAttribute:layoutAttribute];
+    MASViewConstraint *newConstraint = [[MASViewConstraint alloc] initWithFirstViewAttribute:viewAttribute];
+    if ([constraint isKindOfClass:MASViewConstraint.class]) {
+        //replace with composite constraint
+        NSArray *children = @[constraint, newConstraint];
+        MASCompositeConstraint *compositeConstraint = [[MASCompositeConstraint alloc] initWithChildren:children];
+        compositeConstraint.delegate = self;
+        [self constraint:constraint shouldBeReplacedWithConstraint:compositeConstraint];
+        return compositeConstraint;
+    }
+    if (!constraint) {
+        newConstraint.delegate = self;
+        [self.constraints addObject:newConstraint];
+    }
+    return newConstraint;
+}
+
+- (MASConstraint *)addConstraintWithAttributes:(MASAttribute)attrs {
+    __unused MASAttribute anyAttribute = (MASAttributeLeft | MASAttributeRight | MASAttributeTop | MASAttributeBottom | MASAttributeLeading
+                                          | MASAttributeTrailing | MASAttributeWidth | MASAttributeHeight | MASAttributeCenterX
+                                          | MASAttributeCenterY | MASAttributeBaseline
+#if (__IPHONE_OS_VERSION_MIN_REQUIRED >= 80000) || (__TV_OS_VERSION_MIN_REQUIRED >= 9000) || (__MAC_OS_X_VERSION_MIN_REQUIRED >= 101100)
+                                          | MASAttributeFirstBaseline | MASAttributeLastBaseline
+#endif
+#if (__IPHONE_OS_VERSION_MIN_REQUIRED >= 80000) || (__TV_OS_VERSION_MIN_REQUIRED >= 9000)
+                                          | MASAttributeLeftMargin | MASAttributeRightMargin | MASAttributeTopMargin | MASAttributeBottomMargin
+                                          | MASAttributeLeadingMargin | MASAttributeTrailingMargin | MASAttributeCenterXWithinMargins
+                                          | MASAttributeCenterYWithinMargins
+#endif
+                                          );
+    
+    NSAssert((attrs & anyAttribute) != 0, @"You didn't pass any attribute to make.attributes(...)");
+    
+    NSMutableArray *attributes = [NSMutableArray array];
+    
+    if (attrs & MASAttributeLeft) [attributes addObject:self.view.mas_left];
+    if (attrs & MASAttributeRight) [attributes addObject:self.view.mas_right];
+    if (attrs & MASAttributeTop) [attributes addObject:self.view.mas_top];
+    if (attrs & MASAttributeBottom) [attributes addObject:self.view.mas_bottom];
+    if (attrs & MASAttributeLeading) [attributes addObject:self.view.mas_leading];
+    if (attrs & MASAttributeTrailing) [attributes addObject:self.view.mas_trailing];
+    if (attrs & MASAttributeWidth) [attributes addObject:self.view.mas_width];
+    if (attrs & MASAttributeHeight) [attributes addObject:self.view.mas_height];
+    if (attrs & MASAttributeCenterX) [attributes addObject:self.view.mas_centerX];
+    if (attrs & MASAttributeCenterY) [attributes addObject:self.view.mas_centerY];
+    if (attrs & MASAttributeBaseline) [attributes addObject:self.view.mas_baseline];
+    
+#if (__IPHONE_OS_VERSION_MIN_REQUIRED >= 80000) || (__TV_OS_VERSION_MIN_REQUIRED >= 9000) || (__MAC_OS_X_VERSION_MIN_REQUIRED >= 101100)
+    
+    if (attrs & MASAttributeFirstBaseline) [attributes addObject:self.view.mas_firstBaseline];
+    if (attrs & MASAttributeLastBaseline) [attributes addObject:self.view.mas_lastBaseline];
+    
+#endif
+    
+#if (__IPHONE_OS_VERSION_MIN_REQUIRED >= 80000) || (__TV_OS_VERSION_MIN_REQUIRED >= 9000)
+    
+    if (attrs & MASAttributeLeftMargin) [attributes addObject:self.view.mas_leftMargin];
+    if (attrs & MASAttributeRightMargin) [attributes addObject:self.view.mas_rightMargin];
+    if (attrs & MASAttributeTopMargin) [attributes addObject:self.view.mas_topMargin];
+    if (attrs & MASAttributeBottomMargin) [attributes addObject:self.view.mas_bottomMargin];
+    if (attrs & MASAttributeLeadingMargin) [attributes addObject:self.view.mas_leadingMargin];
+    if (attrs & MASAttributeTrailingMargin) [attributes addObject:self.view.mas_trailingMargin];
+    if (attrs & MASAttributeCenterXWithinMargins) [attributes addObject:self.view.mas_centerXWithinMargins];
+    if (attrs & MASAttributeCenterYWithinMargins) [attributes addObject:self.view.mas_centerYWithinMargins];
+    
+#endif
+    
+    NSMutableArray *children = [NSMutableArray arrayWithCapacity:attributes.count];
+    
+    for (MASViewAttribute *a in attributes) {
+        [children addObject:[[MASViewConstraint alloc] initWithFirstViewAttribute:a]];
+    }
+    
+    MASCompositeConstraint *constraint = [[MASCompositeConstraint alloc] initWithChildren:children];
+    constraint.delegate = self;
+    [self.constraints addObject:constraint];
+    return constraint;
+}
+
+#pragma mark - standard Attributes
+
+- (MASConstraint *)addConstraintWithLayoutAttribute:(NSLayoutAttribute)layoutAttribute {
+    return [self constraint:nil addConstraintWithLayoutAttribute:layoutAttribute];
+}
+
+- (MASConstraint *)left {
+    return [self addConstraintWithLayoutAttribute:NSLayoutAttributeLeft];
+}
+
+- (MASConstraint *)top {
+    return [self addConstraintWithLayoutAttribute:NSLayoutAttributeTop];
+}
+
+- (MASConstraint *)right {
+    return [self addConstraintWithLayoutAttribute:NSLayoutAttributeRight];
+}
+
+- (MASConstraint *)bottom {
+    return [self addConstraintWithLayoutAttribute:NSLayoutAttributeBottom];
+}
+
+- (MASConstraint *)leading {
+    return [self addConstraintWithLayoutAttribute:NSLayoutAttributeLeading];
+}
+
+- (MASConstraint *)trailing {
+    return [self addConstraintWithLayoutAttribute:NSLayoutAttributeTrailing];
+}
+
+- (MASConstraint *)width {
+    return [self addConstraintWithLayoutAttribute:NSLayoutAttributeWidth];
+}
+
+- (MASConstraint *)height {
+    return [self addConstraintWithLayoutAttribute:NSLayoutAttributeHeight];
+}
+
+- (MASConstraint *)centerX {
+    return [self addConstraintWithLayoutAttribute:NSLayoutAttributeCenterX];
+}
+
+- (MASConstraint *)centerY {
+    return [self addConstraintWithLayoutAttribute:NSLayoutAttributeCenterY];
+}
+
+- (MASConstraint *)baseline {
+    return [self addConstraintWithLayoutAttribute:NSLayoutAttributeBaseline];
+}
+
+- (MASConstraint *(^)(MASAttribute))attributes {
+    return ^(MASAttribute attrs){
+        return [self addConstraintWithAttributes:attrs];
+    };
+}
+
+#if (__IPHONE_OS_VERSION_MIN_REQUIRED >= 80000) || (__TV_OS_VERSION_MIN_REQUIRED >= 9000) || (__MAC_OS_X_VERSION_MIN_REQUIRED >= 101100)
+
+- (MASConstraint *)firstBaseline {
+    return [self addConstraintWithLayoutAttribute:NSLayoutAttributeFirstBaseline];
+}
+
+- (MASConstraint *)lastBaseline {
+    return [self addConstraintWithLayoutAttribute:NSLayoutAttributeLastBaseline];
+}
+
+#endif
+
+
+#if (__IPHONE_OS_VERSION_MIN_REQUIRED >= 80000) || (__TV_OS_VERSION_MIN_REQUIRED >= 9000)
+
+- (MASConstraint *)leftMargin {
+    return [self addConstraintWithLayoutAttribute:NSLayoutAttributeLeftMargin];
+}
+
+- (MASConstraint *)rightMargin {
+    return [self addConstraintWithLayoutAttribute:NSLayoutAttributeRightMargin];
+}
+
+- (MASConstraint *)topMargin {
+    return [self addConstraintWithLayoutAttribute:NSLayoutAttributeTopMargin];
+}
+
+- (MASConstraint *)bottomMargin {
+    return [self addConstraintWithLayoutAttribute:NSLayoutAttributeBottomMargin];
+}
+
+- (MASConstraint *)leadingMargin {
+    return [self addConstraintWithLayoutAttribute:NSLayoutAttributeLeadingMargin];
+}
+
+- (MASConstraint *)trailingMargin {
+    return [self addConstraintWithLayoutAttribute:NSLayoutAttributeTrailingMargin];
+}
+
+- (MASConstraint *)centerXWithinMargins {
+    return [self addConstraintWithLayoutAttribute:NSLayoutAttributeCenterXWithinMargins];
+}
+
+- (MASConstraint *)centerYWithinMargins {
+    return [self addConstraintWithLayoutAttribute:NSLayoutAttributeCenterYWithinMargins];
+}
+
+#endif
+
+
+#pragma mark - composite Attributes
+
+- (MASConstraint *)edges {
+    return [self addConstraintWithAttributes:MASAttributeTop | MASAttributeLeft | MASAttributeRight | MASAttributeBottom];
+}
+
+- (MASConstraint *)size {
+    return [self addConstraintWithAttributes:MASAttributeWidth | MASAttributeHeight];
+}
+
+- (MASConstraint *)center {
+    return [self addConstraintWithAttributes:MASAttributeCenterX | MASAttributeCenterY];
+}
+
+#pragma mark - grouping
+
+- (MASConstraint *(^)(dispatch_block_t group))group {
+    return ^id(dispatch_block_t group) {
+        NSInteger previousCount = self.constraints.count;
+        group();
+
+        NSArray *children = [self.constraints subarrayWithRange:NSMakeRange(previousCount, self.constraints.count - previousCount)];
+        MASCompositeConstraint *constraint = [[MASCompositeConstraint alloc] initWithChildren:children];
+        constraint.delegate = self;
+        return constraint;
+    };
+}
+
+@end

Pods/Masonry/Masonry/MASLayoutConstraint.h

@@ -0,0 +1,22 @@
+//
+//  MASLayoutConstraint.h
+//  Masonry
+//
+//  Created by Jonas Budelmann on 3/08/13.
+//  Copyright (c) 2013 Jonas Budelmann. All rights reserved.
+//
+
+#import "MASUtilities.h"
+
+/**
+ *	When you are debugging or printing the constraints attached to a view this subclass
+ *  makes it easier to identify which constraints have been created via Masonry
+ */
+@interface MASLayoutConstraint : NSLayoutConstraint
+
+/**
+ *	a key to associate with this constraint
+ */
+@property (nonatomic, strong) id mas_key;
+
+@end

Pods/Masonry/Masonry/MASLayoutConstraint.m

@@ -0,0 +1,13 @@
+//
+//  MASLayoutConstraint.m
+//  Masonry
+//
+//  Created by Jonas Budelmann on 3/08/13.
+//  Copyright (c) 2013 Jonas Budelmann. All rights reserved.
+//
+
+#import "MASLayoutConstraint.h"
+
+@implementation MASLayoutConstraint
+
+@end

Pods/Masonry/Masonry/MASUtilities.h

@@ -0,0 +1,136 @@
+//
+//  MASUtilities.h
+//  Masonry
+//
+//  Created by Jonas Budelmann on 19/08/13.
+//  Copyright (c) 2013 Jonas Budelmann. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+
+
+
+#if TARGET_OS_IPHONE || TARGET_OS_TV
+
+    #import <UIKit/UIKit.h>
+    #define MAS_VIEW UIView
+    #define MAS_VIEW_CONTROLLER UIViewController
+    #define MASEdgeInsets UIEdgeInsets
+
+    typedef UILayoutPriority MASLayoutPriority;
+    static const MASLayoutPriority MASLayoutPriorityRequired = UILayoutPriorityRequired;
+    static const MASLayoutPriority MASLayoutPriorityDefaultHigh = UILayoutPriorityDefaultHigh;
+    static const MASLayoutPriority MASLayoutPriorityDefaultMedium = 500;
+    static const MASLayoutPriority MASLayoutPriorityDefaultLow = UILayoutPriorityDefaultLow;
+    static const MASLayoutPriority MASLayoutPriorityFittingSizeLevel = UILayoutPriorityFittingSizeLevel;
+
+#elif TARGET_OS_MAC
+
+    #import <AppKit/AppKit.h>
+    #define MAS_VIEW NSView
+    #define MASEdgeInsets NSEdgeInsets
+
+    typedef NSLayoutPriority MASLayoutPriority;
+    static const MASLayoutPriority MASLayoutPriorityRequired = NSLayoutPriorityRequired;
+    static const MASLayoutPriority MASLayoutPriorityDefaultHigh = NSLayoutPriorityDefaultHigh;
+    static const MASLayoutPriority MASLayoutPriorityDragThatCanResizeWindow = NSLayoutPriorityDragThatCanResizeWindow;
+    static const MASLayoutPriority MASLayoutPriorityDefaultMedium = 501;
+    static const MASLayoutPriority MASLayoutPriorityWindowSizeStayPut = NSLayoutPriorityWindowSizeStayPut;
+    static const MASLayoutPriority MASLayoutPriorityDragThatCannotResizeWindow = NSLayoutPriorityDragThatCannotResizeWindow;
+    static const MASLayoutPriority MASLayoutPriorityDefaultLow = NSLayoutPriorityDefaultLow;
+    static const MASLayoutPriority MASLayoutPriorityFittingSizeCompression = NSLayoutPriorityFittingSizeCompression;
+
+#endif
+
+/**
+ *	Allows you to attach keys to objects matching the variable names passed.
+ *
+ *  view1.mas_key = @"view1", view2.mas_key = @"view2";
+ *
+ *  is equivalent to:
+ *
+ *  MASAttachKeys(view1, view2);
+ */
+#define MASAttachKeys(...)                                                        \
+    {                                                                             \
+        NSDictionary *keyPairs = NSDictionaryOfVariableBindings(__VA_ARGS__);     \
+        for (id key in keyPairs.allKeys) {                                        \
+            id obj = keyPairs[key];                                               \
+            NSAssert([obj respondsToSelector:@selector(setMas_key:)],             \
+                     @"Cannot attach mas_key to %@", obj);                        \
+            [obj setMas_key:key];                                                 \
+        }                                                                         \
+    }
+
+/**
+ *  Used to create object hashes
+ *  Based on http://www.mikeash.com/pyblog/friday-qa-2010-06-18-implementing-equality-and-hashing.html
+ */
+#define MAS_NSUINT_BIT (CHAR_BIT * sizeof(NSUInteger))
+#define MAS_NSUINTROTATE(val, howmuch) ((((NSUInteger)val) << howmuch) | (((NSUInteger)val) >> (MAS_NSUINT_BIT - howmuch)))
+
+/**
+ *  Given a scalar or struct value, wraps it in NSValue
+ *  Based on EXPObjectify: https://github.com/specta/expecta
+ */
+static inline id _MASBoxValue(const char *type, ...) {
+    va_list v;
+    va_start(v, type);
+    id obj = nil;
+    if (strcmp(type, @encode(id)) == 0) {
+        id actual = va_arg(v, id);
+        obj = actual;
+    } else if (strcmp(type, @encode(CGPoint)) == 0) {
+        CGPoint actual = (CGPoint)va_arg(v, CGPoint);
+        obj = [NSValue value:&actual withObjCType:type];
+    } else if (strcmp(type, @encode(CGSize)) == 0) {
+        CGSize actual = (CGSize)va_arg(v, CGSize);
+        obj = [NSValue value:&actual withObjCType:type];
+    } else if (strcmp(type, @encode(MASEdgeInsets)) == 0) {
+        MASEdgeInsets actual = (MASEdgeInsets)va_arg(v, MASEdgeInsets);
+        obj = [NSValue value:&actual withObjCType:type];
+    } else if (strcmp(type, @encode(double)) == 0) {
+        double actual = (double)va_arg(v, double);
+        obj = [NSNumber numberWithDouble:actual];
+    } else if (strcmp(type, @encode(float)) == 0) {
+        float actual = (float)va_arg(v, double);
+        obj = [NSNumber numberWithFloat:actual];
+    } else if (strcmp(type, @encode(int)) == 0) {
+        int actual = (int)va_arg(v, int);
+        obj = [NSNumber numberWithInt:actual];
+    } else if (strcmp(type, @encode(long)) == 0) {
+        long actual = (long)va_arg(v, long);
+        obj = [NSNumber numberWithLong:actual];
+    } else if (strcmp(type, @encode(long long)) == 0) {
+        long long actual = (long long)va_arg(v, long long);
+        obj = [NSNumber numberWithLongLong:actual];
+    } else if (strcmp(type, @encode(short)) == 0) {
+        short actual = (short)va_arg(v, int);
+        obj = [NSNumber numberWithShort:actual];
+    } else if (strcmp(type, @encode(char)) == 0) {
+        char actual = (char)va_arg(v, int);
+        obj = [NSNumber numberWithChar:actual];
+    } else if (strcmp(type, @encode(bool)) == 0) {
+        bool actual = (bool)va_arg(v, int);
+        obj = [NSNumber numberWithBool:actual];
+    } else if (strcmp(type, @encode(unsigned char)) == 0) {
+        unsigned char actual = (unsigned char)va_arg(v, unsigned int);
+        obj = [NSNumber numberWithUnsignedChar:actual];
+    } else if (strcmp(type, @encode(unsigned int)) == 0) {
+        unsigned int actual = (unsigned int)va_arg(v, unsigned int);
+        obj = [NSNumber numberWithUnsignedInt:actual];
+    } else if (strcmp(type, @encode(unsigned long)) == 0) {
+        unsigned long actual = (unsigned long)va_arg(v, unsigned long);
+        obj = [NSNumber numberWithUnsignedLong:actual];
+    } else if (strcmp(type, @encode(unsigned long long)) == 0) {
+        unsigned long long actual = (unsigned long long)va_arg(v, unsigned long long);
+        obj = [NSNumber numberWithUnsignedLongLong:actual];
+    } else if (strcmp(type, @encode(unsigned short)) == 0) {
+        unsigned short actual = (unsigned short)va_arg(v, unsigned int);
+        obj = [NSNumber numberWithUnsignedShort:actual];
+    }
+    va_end(v);
+    return obj;
+}
+
+#define MASBoxValue(value) _MASBoxValue(@encode(__typeof__((value))), (value))

Pods/Masonry/Masonry/MASViewAttribute.h

@@ -0,0 +1,49 @@
+//
+//  MASViewAttribute.h
+//  Masonry
+//
+//  Created by Jonas Budelmann on 21/07/13.
+//  Copyright (c) 2013 cloudling. All rights reserved.
+//
+
+#import "MASUtilities.h"
+
+/**
+ *  An immutable tuple which stores the view and the related NSLayoutAttribute.
+ *  Describes part of either the left or right hand side of a constraint equation
+ */
+@interface MASViewAttribute : NSObject
+
+/**
+ *  The view which the reciever relates to. Can be nil if item is not a view.
+ */
+@property (nonatomic, weak, readonly) MAS_VIEW *view;
+
+/**
+ *  The item which the reciever relates to.
+ */
+@property (nonatomic, weak, readonly) id item;
+
+/**
+ *  The attribute which the reciever relates to
+ */
+@property (nonatomic, assign, readonly) NSLayoutAttribute layoutAttribute;
+
+/**
+ *  Convenience initializer.
+ */
+- (id)initWithView:(MAS_VIEW *)view layoutAttribute:(NSLayoutAttribute)layoutAttribute;
+
+/**
+ *  The designated initializer.
+ */
+- (id)initWithView:(MAS_VIEW *)view item:(id)item layoutAttribute:(NSLayoutAttribute)layoutAttribute;
+
+/**
+ *	Determine whether the layoutAttribute is a size attribute
+ *
+ *	@return	YES if layoutAttribute is equal to NSLayoutAttributeWidth or NSLayoutAttributeHeight
+ */
+- (BOOL)isSizeAttribute;
+
+@end

Pods/Masonry/Masonry/MASViewAttribute.m

@@ -0,0 +1,46 @@
+//
+//  MASViewAttribute.m
+//  Masonry
+//
+//  Created by Jonas Budelmann on 21/07/13.
+//  Copyright (c) 2013 cloudling. All rights reserved.
+//
+
+#import "MASViewAttribute.h"
+
+@implementation MASViewAttribute
+
+- (id)initWithView:(MAS_VIEW *)view layoutAttribute:(NSLayoutAttribute)layoutAttribute {
+    self = [self initWithView:view item:view layoutAttribute:layoutAttribute];
+    return self;
+}
+
+- (id)initWithView:(MAS_VIEW *)view item:(id)item layoutAttribute:(NSLayoutAttribute)layoutAttribute {
+    self = [super init];
+    if (!self) return nil;
+    
+    _view = view;
+    _item = item;
+    _layoutAttribute = layoutAttribute;
+    
+    return self;
+}
+
+- (BOOL)isSizeAttribute {
+    return self.layoutAttribute == NSLayoutAttributeWidth
+        || self.layoutAttribute == NSLayoutAttributeHeight;
+}
+
+- (BOOL)isEqual:(MASViewAttribute *)viewAttribute {
+    if ([viewAttribute isKindOfClass:self.class]) {
+        return self.view == viewAttribute.view
+            && self.layoutAttribute == viewAttribute.layoutAttribute;
+    }
+    return [super isEqual:viewAttribute];
+}
+
+- (NSUInteger)hash {
+    return MAS_NSUINTROTATE([self.view hash], MAS_NSUINT_BIT / 2) ^ self.layoutAttribute;
+}
+
+@end

Pods/Masonry/Masonry/MASViewConstraint.h

@@ -0,0 +1,48 @@
+//
+//  MASViewConstraint.h
+//  Masonry
+//
+//  Created by Jonas Budelmann on 20/07/13.
+//  Copyright (c) 2013 cloudling. All rights reserved.
+//
+
+#import "MASViewAttribute.h"
+#import "MASConstraint.h"
+#import "MASLayoutConstraint.h"
+#import "MASUtilities.h"
+
+/**
+ *  A single constraint.
+ *  Contains the attributes neccessary for creating a NSLayoutConstraint and adding it to the appropriate view
+ */
+@interface MASViewConstraint : MASConstraint <NSCopying>
+
+/**
+ *	First item/view and first attribute of the NSLayoutConstraint
+ */
+@property (nonatomic, strong, readonly) MASViewAttribute *firstViewAttribute;
+
+/**
+ *	Second item/view and second attribute of the NSLayoutConstraint
+ */
+@property (nonatomic, strong, readonly) MASViewAttribute *secondViewAttribute;
+
+/**
+ *	initialises the MASViewConstraint with the first part of the equation
+ *
+ *	@param	firstViewAttribute	view.mas_left, view.mas_width etc.
+ *
+ *	@return	a new view constraint
+ */
+- (id)initWithFirstViewAttribute:(MASViewAttribute *)firstViewAttribute;
+
+/**
+ *  Returns all MASViewConstraints installed with this view as a first item.
+ *
+ *  @param  view  A view to retrieve constraints for.
+ *
+ *  @return An array of MASViewConstraints.
+ */
++ (NSArray *)installedConstraintsForView:(MAS_VIEW *)view;
+
+@end

Pods/Masonry/Masonry/MASViewConstraint.m

@@ -0,0 +1,401 @@
+//
+//  MASViewConstraint.m
+//  Masonry
+//
+//  Created by Jonas Budelmann on 20/07/13.
+//  Copyright (c) 2013 cloudling. All rights reserved.
+//
+
+#import "MASViewConstraint.h"
+#import "MASConstraint+Private.h"
+#import "MASCompositeConstraint.h"
+#import "MASLayoutConstraint.h"
+#import "View+MASAdditions.h"
+#import <objc/runtime.h>
+
+@interface MAS_VIEW (MASConstraints)
+
+@property (nonatomic, readonly) NSMutableSet *mas_installedConstraints;
+
+@end
+
+@implementation MAS_VIEW (MASConstraints)
+
+static char kInstalledConstraintsKey;
+
+- (NSMutableSet *)mas_installedConstraints {
+    NSMutableSet *constraints = objc_getAssociatedObject(self, &kInstalledConstraintsKey);
+    if (!constraints) {
+        constraints = [NSMutableSet set];
+        objc_setAssociatedObject(self, &kInstalledConstraintsKey, constraints, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
+    }
+    return constraints;
+}
+
+@end
+
+
+@interface MASViewConstraint ()
+
+@property (nonatomic, strong, readwrite) MASViewAttribute *secondViewAttribute;
+@property (nonatomic, weak) MAS_VIEW *installedView;
+@property (nonatomic, weak) MASLayoutConstraint *layoutConstraint;
+@property (nonatomic, assign) NSLayoutRelation layoutRelation;
+@property (nonatomic, assign) MASLayoutPriority layoutPriority;
+@property (nonatomic, assign) CGFloat layoutMultiplier;
+@property (nonatomic, assign) CGFloat layoutConstant;
+@property (nonatomic, assign) BOOL hasLayoutRelation;
+@property (nonatomic, strong) id mas_key;
+@property (nonatomic, assign) BOOL useAnimator;
+
+@end
+
+@implementation MASViewConstraint
+
+- (id)initWithFirstViewAttribute:(MASViewAttribute *)firstViewAttribute {
+    self = [super init];
+    if (!self) return nil;
+    
+    _firstViewAttribute = firstViewAttribute;
+    self.layoutPriority = MASLayoutPriorityRequired;
+    self.layoutMultiplier = 1;
+    
+    return self;
+}
+
+#pragma mark - NSCoping
+
+- (id)copyWithZone:(NSZone __unused *)zone {
+    MASViewConstraint *constraint = [[MASViewConstraint alloc] initWithFirstViewAttribute:self.firstViewAttribute];
+    constraint.layoutConstant = self.layoutConstant;
+    constraint.layoutRelation = self.layoutRelation;
+    constraint.layoutPriority = self.layoutPriority;
+    constraint.layoutMultiplier = self.layoutMultiplier;
+    constraint.delegate = self.delegate;
+    return constraint;
+}
+
+#pragma mark - Public
+
++ (NSArray *)installedConstraintsForView:(MAS_VIEW *)view {
+    return [view.mas_installedConstraints allObjects];
+}
+
+#pragma mark - Private
+
+- (void)setLayoutConstant:(CGFloat)layoutConstant {
+    _layoutConstant = layoutConstant;
+
+#if TARGET_OS_MAC && !(TARGET_OS_IPHONE || TARGET_OS_TV)
+    if (self.useAnimator) {
+        [self.layoutConstraint.animator setConstant:layoutConstant];
+    } else {
+        self.layoutConstraint.constant = layoutConstant;
+    }
+#else
+    self.layoutConstraint.constant = layoutConstant;
+#endif
+}
+
+- (void)setLayoutRelation:(NSLayoutRelation)layoutRelation {
+    _layoutRelation = layoutRelation;
+    self.hasLayoutRelation = YES;
+}
+
+- (BOOL)supportsActiveProperty {
+    return [self.layoutConstraint respondsToSelector:@selector(isActive)];
+}
+
+- (BOOL)isActive {
+    BOOL active = YES;
+    if ([self supportsActiveProperty]) {
+        active = [self.layoutConstraint isActive];
+    }
+
+    return active;
+}
+
+- (BOOL)hasBeenInstalled {
+    return (self.layoutConstraint != nil) && [self isActive];
+}
+
+- (void)setSecondViewAttribute:(id)secondViewAttribute {
+    if ([secondViewAttribute isKindOfClass:NSValue.class]) {
+        [self setLayoutConstantWithValue:secondViewAttribute];
+    } else if ([secondViewAttribute isKindOfClass:MAS_VIEW.class]) {
+        _secondViewAttribute = [[MASViewAttribute alloc] initWithView:secondViewAttribute layoutAttribute:self.firstViewAttribute.layoutAttribute];
+    } else if ([secondViewAttribute isKindOfClass:MASViewAttribute.class]) {
+        _secondViewAttribute = secondViewAttribute;
+    } else {
+        NSAssert(NO, @"attempting to add unsupported attribute: %@", secondViewAttribute);
+    }
+}
+
+#pragma mark - NSLayoutConstraint multiplier proxies
+
+- (MASConstraint * (^)(CGFloat))multipliedBy {
+    return ^id(CGFloat multiplier) {
+        NSAssert(!self.hasBeenInstalled,
+                 @"Cannot modify constraint multiplier after it has been installed");
+        
+        self.layoutMultiplier = multiplier;
+        return self;
+    };
+}
+
+
+- (MASConstraint * (^)(CGFloat))dividedBy {
+    return ^id(CGFloat divider) {
+        NSAssert(!self.hasBeenInstalled,
+                 @"Cannot modify constraint multiplier after it has been installed");
+
+        self.layoutMultiplier = 1.0/divider;
+        return self;
+    };
+}
+
+#pragma mark - MASLayoutPriority proxy
+
+- (MASConstraint * (^)(MASLayoutPriority))priority {
+    return ^id(MASLayoutPriority priority) {
+        NSAssert(!self.hasBeenInstalled,
+                 @"Cannot modify constraint priority after it has been installed");
+        
+        self.layoutPriority = priority;
+        return self;
+    };
+}
+
+#pragma mark - NSLayoutRelation proxy
+
+- (MASConstraint * (^)(id, NSLayoutRelation))equalToWithRelation {
+    return ^id(id attribute, NSLayoutRelation relation) {
+        if ([attribute isKindOfClass:NSArray.class]) {
+            NSAssert(!self.hasLayoutRelation, @"Redefinition of constraint relation");
+            NSMutableArray *children = NSMutableArray.new;
+            for (id attr in attribute) {
+                MASViewConstraint *viewConstraint = [self copy];
+                viewConstraint.layoutRelation = relation;
+                viewConstraint.secondViewAttribute = attr;
+                [children addObject:viewConstraint];
+            }
+            MASCompositeConstraint *compositeConstraint = [[MASCompositeConstraint alloc] initWithChildren:children];
+            compositeConstraint.delegate = self.delegate;
+            [self.delegate constraint:self shouldBeReplacedWithConstraint:compositeConstraint];
+            return compositeConstraint;
+        } else {
+            NSAssert(!self.hasLayoutRelation || self.layoutRelation == relation && [attribute isKindOfClass:NSValue.class], @"Redefinition of constraint relation");
+            self.layoutRelation = relation;
+            self.secondViewAttribute = attribute;
+            return self;
+        }
+    };
+}
+
+#pragma mark - Semantic properties
+
+- (MASConstraint *)with {
+    return self;
+}
+
+- (MASConstraint *)and {
+    return self;
+}
+
+#pragma mark - attribute chaining
+
+- (MASConstraint *)addConstraintWithLayoutAttribute:(NSLayoutAttribute)layoutAttribute {
+    NSAssert(!self.hasLayoutRelation, @"Attributes should be chained before defining the constraint relation");
+
+    return [self.delegate constraint:self addConstraintWithLayoutAttribute:layoutAttribute];
+}
+
+#pragma mark - Animator proxy
+
+#if TARGET_OS_MAC && !(TARGET_OS_IPHONE || TARGET_OS_TV)
+
+- (MASConstraint *)animator {
+    self.useAnimator = YES;
+    return self;
+}
+
+#endif
+
+#pragma mark - debug helpers
+
+- (MASConstraint * (^)(id))key {
+    return ^id(id key) {
+        self.mas_key = key;
+        return self;
+    };
+}
+
+#pragma mark - NSLayoutConstraint constant setters
+
+- (void)setInsets:(MASEdgeInsets)insets {
+    NSLayoutAttribute layoutAttribute = self.firstViewAttribute.layoutAttribute;
+    switch (layoutAttribute) {
+        case NSLayoutAttributeLeft:
+        case NSLayoutAttributeLeading:
+            self.layoutConstant = insets.left;
+            break;
+        case NSLayoutAttributeTop:
+            self.layoutConstant = insets.top;
+            break;
+        case NSLayoutAttributeBottom:
+            self.layoutConstant = -insets.bottom;
+            break;
+        case NSLayoutAttributeRight:
+        case NSLayoutAttributeTrailing:
+            self.layoutConstant = -insets.right;
+            break;
+        default:
+            break;
+    }
+}
+
+- (void)setInset:(CGFloat)inset {
+    [self setInsets:(MASEdgeInsets){.top = inset, .left = inset, .bottom = inset, .right = inset}];
+}
+
+- (void)setOffset:(CGFloat)offset {
+    self.layoutConstant = offset;
+}
+
+- (void)setSizeOffset:(CGSize)sizeOffset {
+    NSLayoutAttribute layoutAttribute = self.firstViewAttribute.layoutAttribute;
+    switch (layoutAttribute) {
+        case NSLayoutAttributeWidth:
+            self.layoutConstant = sizeOffset.width;
+            break;
+        case NSLayoutAttributeHeight:
+            self.layoutConstant = sizeOffset.height;
+            break;
+        default:
+            break;
+    }
+}
+
+- (void)setCenterOffset:(CGPoint)centerOffset {
+    NSLayoutAttribute layoutAttribute = self.firstViewAttribute.layoutAttribute;
+    switch (layoutAttribute) {
+        case NSLayoutAttributeCenterX:
+            self.layoutConstant = centerOffset.x;
+            break;
+        case NSLayoutAttributeCenterY:
+            self.layoutConstant = centerOffset.y;
+            break;
+        default:
+            break;
+    }
+}
+
+#pragma mark - MASConstraint
+
+- (void)activate {
+    [self install];
+}
+
+- (void)deactivate {
+    [self uninstall];
+}
+
+- (void)install {
+    if (self.hasBeenInstalled) {
+        return;
+    }
+    
+    if ([self supportsActiveProperty] && self.layoutConstraint) {
+        self.layoutConstraint.active = YES;
+        [self.firstViewAttribute.view.mas_installedConstraints addObject:self];
+        return;
+    }
+    
+    MAS_VIEW *firstLayoutItem = self.firstViewAttribute.item;
+    NSLayoutAttribute firstLayoutAttribute = self.firstViewAttribute.layoutAttribute;
+    MAS_VIEW *secondLayoutItem = self.secondViewAttribute.item;
+    NSLayoutAttribute secondLayoutAttribute = self.secondViewAttribute.layoutAttribute;
+
+    // alignment attributes must have a secondViewAttribute
+    // therefore we assume that is refering to superview
+    // eg make.left.equalTo(@10)
+    if (!self.firstViewAttribute.isSizeAttribute && !self.secondViewAttribute) {
+        secondLayoutItem = self.firstViewAttribute.view.superview;
+        secondLayoutAttribute = firstLayoutAttribute;
+    }
+    
+    MASLayoutConstraint *layoutConstraint
+        = [MASLayoutConstraint constraintWithItem:firstLayoutItem
+                                        attribute:firstLayoutAttribute
+                                        relatedBy:self.layoutRelation
+                                           toItem:secondLayoutItem
+                                        attribute:secondLayoutAttribute
+                                       multiplier:self.layoutMultiplier
+                                         constant:self.layoutConstant];
+    
+    layoutConstraint.priority = self.layoutPriority;
+    layoutConstraint.mas_key = self.mas_key;
+    
+    if (self.secondViewAttribute.view) {
+        MAS_VIEW *closestCommonSuperview = [self.firstViewAttribute.view mas_closestCommonSuperview:self.secondViewAttribute.view];
+        NSAssert(closestCommonSuperview,
+                 @"couldn't find a common superview for %@ and %@",
+                 self.firstViewAttribute.view, self.secondViewAttribute.view);
+        self.installedView = closestCommonSuperview;
+    } else if (self.firstViewAttribute.isSizeAttribute) {
+        self.installedView = self.firstViewAttribute.view;
+    } else {
+        self.installedView = self.firstViewAttribute.view.superview;
+    }
+
+
+    MASLayoutConstraint *existingConstraint = nil;
+    if (self.updateExisting) {
+        existingConstraint = [self layoutConstraintSimilarTo:layoutConstraint];
+    }
+    if (existingConstraint) {
+        // just update the constant
+        existingConstraint.constant = layoutConstraint.constant;
+        self.layoutConstraint = existingConstraint;
+    } else {
+        [self.installedView addConstraint:layoutConstraint];
+        self.layoutConstraint = layoutConstraint;
+        [firstLayoutItem.mas_installedConstraints addObject:self];
+    }
+}
+
+- (MASLayoutConstraint *)layoutConstraintSimilarTo:(MASLayoutConstraint *)layoutConstraint {
+    // check if any constraints are the same apart from the only mutable property constant
+
+    // go through constraints in reverse as we do not want to match auto-resizing or interface builder constraints
+    // and they are likely to be added first.
+    for (NSLayoutConstraint *existingConstraint in self.installedView.constraints.reverseObjectEnumerator) {
+        if (![existingConstraint isKindOfClass:MASLayoutConstraint.class]) continue;
+        if (existingConstraint.firstItem != layoutConstraint.firstItem) continue;
+        if (existingConstraint.secondItem != layoutConstraint.secondItem) continue;
+        if (existingConstraint.firstAttribute != layoutConstraint.firstAttribute) continue;
+        if (existingConstraint.secondAttribute != layoutConstraint.secondAttribute) continue;
+        if (existingConstraint.relation != layoutConstraint.relation) continue;
+        if (existingConstraint.multiplier != layoutConstraint.multiplier) continue;
+        if (existingConstraint.priority != layoutConstraint.priority) continue;
+
+        return (id)existingConstraint;
+    }
+    return nil;
+}
+
+- (void)uninstall {
+    if ([self supportsActiveProperty]) {
+        self.layoutConstraint.active = NO;
+        [self.firstViewAttribute.view.mas_installedConstraints removeObject:self];
+        return;
+    }
+    
+    [self.installedView removeConstraint:self.layoutConstraint];
+    self.layoutConstraint = nil;
+    self.installedView = nil;
+    
+    [self.firstViewAttribute.view.mas_installedConstraints removeObject:self];
+}
+
+@end

Pods/Masonry/Masonry/Masonry.h

@@ -0,0 +1,29 @@
+//
+//  Masonry.h
+//  Masonry
+//
+//  Created by Jonas Budelmann on 20/07/13.
+//  Copyright (c) 2013 cloudling. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+
+//! Project version number for Masonry.
+FOUNDATION_EXPORT double MasonryVersionNumber;
+
+//! Project version string for Masonry.
+FOUNDATION_EXPORT const unsigned char MasonryVersionString[];
+
+#import "MASUtilities.h"
+#import "View+MASAdditions.h"
+#import "View+MASShorthandAdditions.h"
+#import "ViewController+MASAdditions.h"
+#import "NSArray+MASAdditions.h"
+#import "NSArray+MASShorthandAdditions.h"
+#import "MASConstraint.h"
+#import "MASCompositeConstraint.h"
+#import "MASViewAttribute.h"
+#import "MASViewConstraint.h"
+#import "MASConstraintMaker.h"
+#import "MASLayoutConstraint.h"
+#import "NSLayoutConstraint+MASDebugAdditions.h"

Pods/Masonry/Masonry/NSArray+MASAdditions.h

@@ -0,0 +1,72 @@
+//
+//  NSArray+MASAdditions.h
+//
+//
+//  Created by Daniel Hammond on 11/26/13.
+//
+//
+
+#import "MASUtilities.h"
+#import "MASConstraintMaker.h"
+#import "MASViewAttribute.h"
+
+typedef NS_ENUM(NSUInteger, MASAxisType) {
+    MASAxisTypeHorizontal,
+    MASAxisTypeVertical
+};
+
+@interface NSArray (MASAdditions)
+
+/**
+ *  Creates a MASConstraintMaker with each view in the callee.
+ *  Any constraints defined are added to the view or the appropriate superview once the block has finished executing on each view
+ *
+ *  @param block scope within which you can build up the constraints which you wish to apply to each view.
+ *
+ *  @return Array of created MASConstraints
+ */
+- (NSArray *)mas_makeConstraints:(void (NS_NOESCAPE ^)(MASConstraintMaker *make))block;
+
+/**
+ *  Creates a MASConstraintMaker with each view in the callee.
+ *  Any constraints defined are added to each view or the appropriate superview once the block has finished executing on each view.
+ *  If an existing constraint exists then it will be updated instead.
+ *
+ *  @param block scope within which you can build up the constraints which you wish to apply to each view.
+ *
+ *  @return Array of created/updated MASConstraints
+ */
+- (NSArray *)mas_updateConstraints:(void (NS_NOESCAPE ^)(MASConstraintMaker *make))block;
+
+/**
+ *  Creates a MASConstraintMaker with each view in the callee.
+ *  Any constraints defined are added to each view or the appropriate superview once the block has finished executing on each view.
+ *  All constraints previously installed for the views will be removed.
+ *
+ *  @param block scope within which you can build up the constraints which you wish to apply to each view.
+ *
+ *  @return Array of created/updated MASConstraints
+ */
+- (NSArray *)mas_remakeConstraints:(void (NS_NOESCAPE ^)(MASConstraintMaker *make))block;
+
+/**
+ *  distribute with fixed spacing
+ *
+ *  @param axisType     which axis to distribute items along
+ *  @param fixedSpacing the spacing between each item
+ *  @param leadSpacing  the spacing before the first item and the container
+ *  @param tailSpacing  the spacing after the last item and the container
+ */
+- (void)mas_distributeViewsAlongAxis:(MASAxisType)axisType withFixedSpacing:(CGFloat)fixedSpacing leadSpacing:(CGFloat)leadSpacing tailSpacing:(CGFloat)tailSpacing;
+
+/**
+ *  distribute with fixed item size
+ *
+ *  @param axisType        which axis to distribute items along
+ *  @param fixedItemLength the fixed length of each item
+ *  @param leadSpacing     the spacing before the first item and the container
+ *  @param tailSpacing     the spacing after the last item and the container
+ */
+- (void)mas_distributeViewsAlongAxis:(MASAxisType)axisType withFixedItemLength:(CGFloat)fixedItemLength leadSpacing:(CGFloat)leadSpacing tailSpacing:(CGFloat)tailSpacing;
+
+@end

Pods/Masonry/Masonry/NSArray+MASAdditions.m

@@ -0,0 +1,162 @@
+//
+//  NSArray+MASAdditions.m
+//  
+//
+//  Created by Daniel Hammond on 11/26/13.
+//
+//
+
+#import "NSArray+MASAdditions.h"
+#import "View+MASAdditions.h"
+
+@implementation NSArray (MASAdditions)
+
+- (NSArray *)mas_makeConstraints:(void(^)(MASConstraintMaker *make))block {
+    NSMutableArray *constraints = [NSMutableArray array];
+    for (MAS_VIEW *view in self) {
+        NSAssert([view isKindOfClass:[MAS_VIEW class]], @"All objects in the array must be views");
+        [constraints addObjectsFromArray:[view mas_makeConstraints:block]];
+    }
+    return constraints;
+}
+
+- (NSArray *)mas_updateConstraints:(void(^)(MASConstraintMaker *make))block {
+    NSMutableArray *constraints = [NSMutableArray array];
+    for (MAS_VIEW *view in self) {
+        NSAssert([view isKindOfClass:[MAS_VIEW class]], @"All objects in the array must be views");
+        [constraints addObjectsFromArray:[view mas_updateConstraints:block]];
+    }
+    return constraints;
+}
+
+- (NSArray *)mas_remakeConstraints:(void(^)(MASConstraintMaker *make))block {
+    NSMutableArray *constraints = [NSMutableArray array];
+    for (MAS_VIEW *view in self) {
+        NSAssert([view isKindOfClass:[MAS_VIEW class]], @"All objects in the array must be views");
+        [constraints addObjectsFromArray:[view mas_remakeConstraints:block]];
+    }
+    return constraints;
+}
+
+- (void)mas_distributeViewsAlongAxis:(MASAxisType)axisType withFixedSpacing:(CGFloat)fixedSpacing leadSpacing:(CGFloat)leadSpacing tailSpacing:(CGFloat)tailSpacing {
+    if (self.count < 2) {
+        NSAssert(self.count>1,@"views to distribute need to bigger than one");
+        return;
+    }
+    
+    MAS_VIEW *tempSuperView = [self mas_commonSuperviewOfViews];
+    if (axisType == MASAxisTypeHorizontal) {
+        MAS_VIEW *prev;
+        for (int i = 0; i < self.count; i++) {
+            MAS_VIEW *v = self[i];
+            [v mas_makeConstraints:^(MASConstraintMaker *make) {
+                if (prev) {
+                    make.width.equalTo(prev);
+                    make.left.equalTo(prev.mas_right).offset(fixedSpacing);
+                    if (i == self.count - 1) {//last one
+                        make.right.equalTo(tempSuperView).offset(-tailSpacing);
+                    }
+                }
+                else {//first one
+                    make.left.equalTo(tempSuperView).offset(leadSpacing);
+                }
+                
+            }];
+            prev = v;
+        }
+    }
+    else {
+        MAS_VIEW *prev;
+        for (int i = 0; i < self.count; i++) {
+            MAS_VIEW *v = self[i];
+            [v mas_makeConstraints:^(MASConstraintMaker *make) {
+                if (prev) {
+                    make.height.equalTo(prev);
+                    make.top.equalTo(prev.mas_bottom).offset(fixedSpacing);
+                    if (i == self.count - 1) {//last one
+                        make.bottom.equalTo(tempSuperView).offset(-tailSpacing);
+                    }                    
+                }
+                else {//first one
+                    make.top.equalTo(tempSuperView).offset(leadSpacing);
+                }
+                
+            }];
+            prev = v;
+        }
+    }
+}
+
+- (void)mas_distributeViewsAlongAxis:(MASAxisType)axisType withFixedItemLength:(CGFloat)fixedItemLength leadSpacing:(CGFloat)leadSpacing tailSpacing:(CGFloat)tailSpacing {
+    if (self.count < 2) {
+        NSAssert(self.count>1,@"views to distribute need to bigger than one");
+        return;
+    }
+    
+    MAS_VIEW *tempSuperView = [self mas_commonSuperviewOfViews];
+    if (axisType == MASAxisTypeHorizontal) {
+        MAS_VIEW *prev;
+        for (int i = 0; i < self.count; i++) {
+            MAS_VIEW *v = self[i];
+            [v mas_makeConstraints:^(MASConstraintMaker *make) {
+                make.width.equalTo(@(fixedItemLength));
+                if (prev) {
+                    if (i == self.count - 1) {//last one
+                        make.right.equalTo(tempSuperView).offset(-tailSpacing);
+                    }
+                    else {
+                        CGFloat offset = (1-(i/((CGFloat)self.count-1)))*(fixedItemLength+leadSpacing)-i*tailSpacing/(((CGFloat)self.count-1));
+                        make.right.equalTo(tempSuperView).multipliedBy(i/((CGFloat)self.count-1)).with.offset(offset);
+                    }
+                }
+                else {//first one
+                    make.left.equalTo(tempSuperView).offset(leadSpacing);
+                }
+            }];
+            prev = v;
+        }
+    }
+    else {
+        MAS_VIEW *prev;
+        for (int i = 0; i < self.count; i++) {
+            MAS_VIEW *v = self[i];
+            [v mas_makeConstraints:^(MASConstraintMaker *make) {
+                make.height.equalTo(@(fixedItemLength));
+                if (prev) {
+                    if (i == self.count - 1) {//last one
+                        make.bottom.equalTo(tempSuperView).offset(-tailSpacing);
+                    }
+                    else {
+                        CGFloat offset = (1-(i/((CGFloat)self.count-1)))*(fixedItemLength+leadSpacing)-i*tailSpacing/(((CGFloat)self.count-1));
+                        make.bottom.equalTo(tempSuperView).multipliedBy(i/((CGFloat)self.count-1)).with.offset(offset);
+                    }
+                }
+                else {//first one
+                    make.top.equalTo(tempSuperView).offset(leadSpacing);
+                }
+            }];
+            prev = v;
+        }
+    }
+}
+
+- (MAS_VIEW *)mas_commonSuperviewOfViews
+{
+    MAS_VIEW *commonSuperview = nil;
+    MAS_VIEW *previousView = nil;
+    for (id object in self) {
+        if ([object isKindOfClass:[MAS_VIEW class]]) {
+            MAS_VIEW *view = (MAS_VIEW *)object;
+            if (previousView) {
+                commonSuperview = [view mas_closestCommonSuperview:commonSuperview];
+            } else {
+                commonSuperview = view;
+            }
+            previousView = view;
+        }
+    }
+    NSAssert(commonSuperview, @"Can't constrain views that do not share a common superview. Make sure that all the views in this array have been added into the same view hierarchy.");
+    return commonSuperview;
+}
+
+@end

Pods/Masonry/Masonry/NSArray+MASShorthandAdditions.h

@@ -0,0 +1,41 @@
+//
+//  NSArray+MASShorthandAdditions.h
+//  Masonry
+//
+//  Created by Jonas Budelmann on 22/07/13.
+//  Copyright (c) 2013 Jonas Budelmann. All rights reserved.
+//
+
+#import "NSArray+MASAdditions.h"
+
+#ifdef MAS_SHORTHAND
+
+/**
+ *	Shorthand array additions without the 'mas_' prefixes,
+ *  only enabled if MAS_SHORTHAND is defined
+ */
+@interface NSArray (MASShorthandAdditions)
+
+- (NSArray *)makeConstraints:(void(^)(MASConstraintMaker *make))block;
+- (NSArray *)updateConstraints:(void(^)(MASConstraintMaker *make))block;
+- (NSArray *)remakeConstraints:(void(^)(MASConstraintMaker *make))block;
+
+@end
+
+@implementation NSArray (MASShorthandAdditions)
+
+- (NSArray *)makeConstraints:(void(^)(MASConstraintMaker *))block {
+    return [self mas_makeConstraints:block];
+}
+
+- (NSArray *)updateConstraints:(void(^)(MASConstraintMaker *))block {
+    return [self mas_updateConstraints:block];
+}
+
+- (NSArray *)remakeConstraints:(void(^)(MASConstraintMaker *))block {
+    return [self mas_remakeConstraints:block];
+}
+
+@end
+
+#endif

Pods/Masonry/Masonry/NSLayoutConstraint+MASDebugAdditions.h

@@ -0,0 +1,16 @@
+//
+//  NSLayoutConstraint+MASDebugAdditions.h
+//  Masonry
+//
+//  Created by Jonas Budelmann on 3/08/13.
+//  Copyright (c) 2013 Jonas Budelmann. All rights reserved.
+//
+
+#import "MASUtilities.h"
+
+/**
+ *	makes debug and log output of NSLayoutConstraints more readable
+ */
+@interface NSLayoutConstraint (MASDebugAdditions)
+
+@end

Pods/Masonry/Masonry/NSLayoutConstraint+MASDebugAdditions.m

@@ -0,0 +1,146 @@
+//
+//  NSLayoutConstraint+MASDebugAdditions.m
+//  Masonry
+//
+//  Created by Jonas Budelmann on 3/08/13.
+//  Copyright (c) 2013 Jonas Budelmann. All rights reserved.
+//
+
+#import "NSLayoutConstraint+MASDebugAdditions.h"
+#import "MASConstraint.h"
+#import "MASLayoutConstraint.h"
+
+@implementation NSLayoutConstraint (MASDebugAdditions)
+
+#pragma mark - description maps
+
++ (NSDictionary *)layoutRelationDescriptionsByValue {
+    static dispatch_once_t once;
+    static NSDictionary *descriptionMap;
+    dispatch_once(&once, ^{
+        descriptionMap = @{
+            @(NSLayoutRelationEqual)                : @"==",
+            @(NSLayoutRelationGreaterThanOrEqual)   : @">=",
+            @(NSLayoutRelationLessThanOrEqual)      : @"<=",
+        };
+    });
+    return descriptionMap;
+}
+
++ (NSDictionary *)layoutAttributeDescriptionsByValue {
+    static dispatch_once_t once;
+    static NSDictionary *descriptionMap;
+    dispatch_once(&once, ^{
+        descriptionMap = @{
+            @(NSLayoutAttributeTop)      : @"top",
+            @(NSLayoutAttributeLeft)     : @"left",
+            @(NSLayoutAttributeBottom)   : @"bottom",
+            @(NSLayoutAttributeRight)    : @"right",
+            @(NSLayoutAttributeLeading)  : @"leading",
+            @(NSLayoutAttributeTrailing) : @"trailing",
+            @(NSLayoutAttributeWidth)    : @"width",
+            @(NSLayoutAttributeHeight)   : @"height",
+            @(NSLayoutAttributeCenterX)  : @"centerX",
+            @(NSLayoutAttributeCenterY)  : @"centerY",
+            @(NSLayoutAttributeBaseline) : @"baseline",
+            
+#if (__IPHONE_OS_VERSION_MIN_REQUIRED >= 80000) || (__TV_OS_VERSION_MIN_REQUIRED >= 9000) || (__MAC_OS_X_VERSION_MIN_REQUIRED >= 101100)
+            @(NSLayoutAttributeFirstBaseline) : @"firstBaseline",
+            @(NSLayoutAttributeLastBaseline) : @"lastBaseline",
+#endif
+            
+#if (__IPHONE_OS_VERSION_MIN_REQUIRED >= 80000) || (__TV_OS_VERSION_MIN_REQUIRED >= 9000)
+            @(NSLayoutAttributeLeftMargin)           : @"leftMargin",
+            @(NSLayoutAttributeRightMargin)          : @"rightMargin",
+            @(NSLayoutAttributeTopMargin)            : @"topMargin",
+            @(NSLayoutAttributeBottomMargin)         : @"bottomMargin",
+            @(NSLayoutAttributeLeadingMargin)        : @"leadingMargin",
+            @(NSLayoutAttributeTrailingMargin)       : @"trailingMargin",
+            @(NSLayoutAttributeCenterXWithinMargins) : @"centerXWithinMargins",
+            @(NSLayoutAttributeCenterYWithinMargins) : @"centerYWithinMargins",
+#endif
+            
+        };
+    
+    });
+    return descriptionMap;
+}
+
+
++ (NSDictionary *)layoutPriorityDescriptionsByValue {
+    static dispatch_once_t once;
+    static NSDictionary *descriptionMap;
+    dispatch_once(&once, ^{
+#if TARGET_OS_IPHONE || TARGET_OS_TV
+        descriptionMap = @{
+            @(MASLayoutPriorityDefaultHigh)      : @"high",
+            @(MASLayoutPriorityDefaultLow)       : @"low",
+            @(MASLayoutPriorityDefaultMedium)    : @"medium",
+            @(MASLayoutPriorityRequired)         : @"required",
+            @(MASLayoutPriorityFittingSizeLevel) : @"fitting size",
+        };
+#elif TARGET_OS_MAC
+        descriptionMap = @{
+            @(MASLayoutPriorityDefaultHigh)                 : @"high",
+            @(MASLayoutPriorityDragThatCanResizeWindow)     : @"drag can resize window",
+            @(MASLayoutPriorityDefaultMedium)               : @"medium",
+            @(MASLayoutPriorityWindowSizeStayPut)           : @"window size stay put",
+            @(MASLayoutPriorityDragThatCannotResizeWindow)  : @"drag cannot resize window",
+            @(MASLayoutPriorityDefaultLow)                  : @"low",
+            @(MASLayoutPriorityFittingSizeCompression)      : @"fitting size",
+            @(MASLayoutPriorityRequired)                    : @"required",
+        };
+#endif
+    });
+    return descriptionMap;
+}
+
+#pragma mark - description override
+
++ (NSString *)descriptionForObject:(id)obj {
+    if ([obj respondsToSelector:@selector(mas_key)] && [obj mas_key]) {
+        return [NSString stringWithFormat:@"%@:%@", [obj class], [obj mas_key]];
+    }
+    return [NSString stringWithFormat:@"%@:%p", [obj class], obj];
+}
+
+- (NSString *)description {
+    NSMutableString *description = [[NSMutableString alloc] initWithString:@"<"];
+
+    [description appendString:[self.class descriptionForObject:self]];
+
+    [description appendFormat:@" %@", [self.class descriptionForObject:self.firstItem]];
+    if (self.firstAttribute != NSLayoutAttributeNotAnAttribute) {
+        [description appendFormat:@".%@", self.class.layoutAttributeDescriptionsByValue[@(self.firstAttribute)]];
+    }
+
+    [description appendFormat:@" %@", self.class.layoutRelationDescriptionsByValue[@(self.relation)]];
+
+    if (self.secondItem) {
+        [description appendFormat:@" %@", [self.class descriptionForObject:self.secondItem]];
+    }
+    if (self.secondAttribute != NSLayoutAttributeNotAnAttribute) {
+        [description appendFormat:@".%@", self.class.layoutAttributeDescriptionsByValue[@(self.secondAttribute)]];
+    }
+    
+    if (self.multiplier != 1) {
+        [description appendFormat:@" * %g", self.multiplier];
+    }
+    
+    if (self.secondAttribute == NSLayoutAttributeNotAnAttribute) {
+        [description appendFormat:@" %g", self.constant];
+    } else {
+        if (self.constant) {
+            [description appendFormat:@" %@ %g", (self.constant < 0 ? @"-" : @"+"), ABS(self.constant)];
+        }
+    }
+
+    if (self.priority != MASLayoutPriorityRequired) {
+        [description appendFormat:@" ^%@", self.class.layoutPriorityDescriptionsByValue[@(self.priority)] ?: [NSNumber numberWithDouble:self.priority]];
+    }
+
+    [description appendString:@">"];
+    return description;
+}
+
+@end

Pods/Masonry/Masonry/View+MASAdditions.h

@@ -0,0 +1,111 @@
+//
+//  UIView+MASAdditions.h
+//  Masonry
+//
+//  Created by Jonas Budelmann on 20/07/13.
+//  Copyright (c) 2013 cloudling. All rights reserved.
+//
+
+#import "MASUtilities.h"
+#import "MASConstraintMaker.h"
+#import "MASViewAttribute.h"
+
+/**
+ *	Provides constraint maker block
+ *  and convience methods for creating MASViewAttribute which are view + NSLayoutAttribute pairs
+ */
+@interface MAS_VIEW (MASAdditions)
+
+/**
+ *	following properties return a new MASViewAttribute with current view and appropriate NSLayoutAttribute
+ */
+@property (nonatomic, strong, readonly) MASViewAttribute *mas_left;
+@property (nonatomic, strong, readonly) MASViewAttribute *mas_top;
+@property (nonatomic, strong, readonly) MASViewAttribute *mas_right;
+@property (nonatomic, strong, readonly) MASViewAttribute *mas_bottom;
+@property (nonatomic, strong, readonly) MASViewAttribute *mas_leading;
+@property (nonatomic, strong, readonly) MASViewAttribute *mas_trailing;
+@property (nonatomic, strong, readonly) MASViewAttribute *mas_width;
+@property (nonatomic, strong, readonly) MASViewAttribute *mas_height;
+@property (nonatomic, strong, readonly) MASViewAttribute *mas_centerX;
+@property (nonatomic, strong, readonly) MASViewAttribute *mas_centerY;
+@property (nonatomic, strong, readonly) MASViewAttribute *mas_baseline;
+@property (nonatomic, strong, readonly) MASViewAttribute *(^mas_attribute)(NSLayoutAttribute attr);
+
+#if (__IPHONE_OS_VERSION_MIN_REQUIRED >= 80000) || (__TV_OS_VERSION_MIN_REQUIRED >= 9000) || (__MAC_OS_X_VERSION_MIN_REQUIRED >= 101100)
+
+@property (nonatomic, strong, readonly) MASViewAttribute *mas_firstBaseline;
+@property (nonatomic, strong, readonly) MASViewAttribute *mas_lastBaseline;
+
+#endif
+
+#if (__IPHONE_OS_VERSION_MIN_REQUIRED >= 80000) || (__TV_OS_VERSION_MIN_REQUIRED >= 9000)
+
+@property (nonatomic, strong, readonly) MASViewAttribute *mas_leftMargin;
+@property (nonatomic, strong, readonly) MASViewAttribute *mas_rightMargin;
+@property (nonatomic, strong, readonly) MASViewAttribute *mas_topMargin;
+@property (nonatomic, strong, readonly) MASViewAttribute *mas_bottomMargin;
+@property (nonatomic, strong, readonly) MASViewAttribute *mas_leadingMargin;
+@property (nonatomic, strong, readonly) MASViewAttribute *mas_trailingMargin;
+@property (nonatomic, strong, readonly) MASViewAttribute *mas_centerXWithinMargins;
+@property (nonatomic, strong, readonly) MASViewAttribute *mas_centerYWithinMargins;
+
+#endif
+
+#if (__IPHONE_OS_VERSION_MAX_ALLOWED >= 110000) || (__TV_OS_VERSION_MAX_ALLOWED >= 110000)
+
+@property (nonatomic, strong, readonly) MASViewAttribute *mas_safeAreaLayoutGuide API_AVAILABLE(ios(11.0),tvos(11.0));
+@property (nonatomic, strong, readonly) MASViewAttribute *mas_safeAreaLayoutGuideTop API_AVAILABLE(ios(11.0),tvos(11.0));
+@property (nonatomic, strong, readonly) MASViewAttribute *mas_safeAreaLayoutGuideBottom API_AVAILABLE(ios(11.0),tvos(11.0));
+@property (nonatomic, strong, readonly) MASViewAttribute *mas_safeAreaLayoutGuideLeft API_AVAILABLE(ios(11.0),tvos(11.0));
+@property (nonatomic, strong, readonly) MASViewAttribute *mas_safeAreaLayoutGuideRight API_AVAILABLE(ios(11.0),tvos(11.0));
+
+#endif
+
+/**
+ *	a key to associate with this view
+ */
+@property (nonatomic, strong) id mas_key;
+
+/**
+ *	Finds the closest common superview between this view and another view
+ *
+ *	@param	view	other view
+ *
+ *	@return	returns nil if common superview could not be found
+ */
+- (instancetype)mas_closestCommonSuperview:(MAS_VIEW *)view;
+
+/**
+ *  Creates a MASConstraintMaker with the callee view.
+ *  Any constraints defined are added to the view or the appropriate superview once the block has finished executing
+ *
+ *  @param block scope within which you can build up the constraints which you wish to apply to the view.
+ *
+ *  @return Array of created MASConstraints
+ */
+- (NSArray *)mas_makeConstraints:(void(NS_NOESCAPE ^)(MASConstraintMaker *make))block;
+
+/**
+ *  Creates a MASConstraintMaker with the callee view.
+ *  Any constraints defined are added to the view or the appropriate superview once the block has finished executing.
+ *  If an existing constraint exists then it will be updated instead.
+ *
+ *  @param block scope within which you can build up the constraints which you wish to apply to the view.
+ *
+ *  @return Array of created/updated MASConstraints
+ */
+- (NSArray *)mas_updateConstraints:(void(NS_NOESCAPE ^)(MASConstraintMaker *make))block;
+
+/**
+ *  Creates a MASConstraintMaker with the callee view.
+ *  Any constraints defined are added to the view or the appropriate superview once the block has finished executing.
+ *  All constraints previously installed for the view will be removed.
+ *
+ *  @param block scope within which you can build up the constraints which you wish to apply to the view.
+ *
+ *  @return Array of created/updated MASConstraints
+ */
+- (NSArray *)mas_remakeConstraints:(void(NS_NOESCAPE ^)(MASConstraintMaker *make))block;
+
+@end

Pods/Masonry/Masonry/View+MASAdditions.m

@@ -0,0 +1,186 @@
+//
+//  UIView+MASAdditions.m
+//  Masonry
+//
+//  Created by Jonas Budelmann on 20/07/13.
+//  Copyright (c) 2013 cloudling. All rights reserved.
+//
+
+#import "View+MASAdditions.h"
+#import <objc/runtime.h>
+
+@implementation MAS_VIEW (MASAdditions)
+
+- (NSArray *)mas_makeConstraints:(void(^)(MASConstraintMaker *))block {
+    self.translatesAutoresizingMaskIntoConstraints = NO;
+    MASConstraintMaker *constraintMaker = [[MASConstraintMaker alloc] initWithView:self];
+    block(constraintMaker);
+    return [constraintMaker install];
+}
+
+- (NSArray *)mas_updateConstraints:(void(^)(MASConstraintMaker *))block {
+    self.translatesAutoresizingMaskIntoConstraints = NO;
+    MASConstraintMaker *constraintMaker = [[MASConstraintMaker alloc] initWithView:self];
+    constraintMaker.updateExisting = YES;
+    block(constraintMaker);
+    return [constraintMaker install];
+}
+
+- (NSArray *)mas_remakeConstraints:(void(^)(MASConstraintMaker *make))block {
+    self.translatesAutoresizingMaskIntoConstraints = NO;
+    MASConstraintMaker *constraintMaker = [[MASConstraintMaker alloc] initWithView:self];
+    constraintMaker.removeExisting = YES;
+    block(constraintMaker);
+    return [constraintMaker install];
+}
+
+#pragma mark - NSLayoutAttribute properties
+
+- (MASViewAttribute *)mas_left {
+    return [[MASViewAttribute alloc] initWithView:self layoutAttribute:NSLayoutAttributeLeft];
+}
+
+- (MASViewAttribute *)mas_top {
+    return [[MASViewAttribute alloc] initWithView:self layoutAttribute:NSLayoutAttributeTop];
+}
+
+- (MASViewAttribute *)mas_right {
+    return [[MASViewAttribute alloc] initWithView:self layoutAttribute:NSLayoutAttributeRight];
+}
+
+- (MASViewAttribute *)mas_bottom {
+    return [[MASViewAttribute alloc] initWithView:self layoutAttribute:NSLayoutAttributeBottom];
+}
+
+- (MASViewAttribute *)mas_leading {
+    return [[MASViewAttribute alloc] initWithView:self layoutAttribute:NSLayoutAttributeLeading];
+}
+
+- (MASViewAttribute *)mas_trailing {
+    return [[MASViewAttribute alloc] initWithView:self layoutAttribute:NSLayoutAttributeTrailing];
+}
+
+- (MASViewAttribute *)mas_width {
+    return [[MASViewAttribute alloc] initWithView:self layoutAttribute:NSLayoutAttributeWidth];
+}
+
+- (MASViewAttribute *)mas_height {
+    return [[MASViewAttribute alloc] initWithView:self layoutAttribute:NSLayoutAttributeHeight];
+}
+
+- (MASViewAttribute *)mas_centerX {
+    return [[MASViewAttribute alloc] initWithView:self layoutAttribute:NSLayoutAttributeCenterX];
+}
+
+- (MASViewAttribute *)mas_centerY {
+    return [[MASViewAttribute alloc] initWithView:self layoutAttribute:NSLayoutAttributeCenterY];
+}
+
+- (MASViewAttribute *)mas_baseline {
+    return [[MASViewAttribute alloc] initWithView:self layoutAttribute:NSLayoutAttributeBaseline];
+}
+
+- (MASViewAttribute *(^)(NSLayoutAttribute))mas_attribute
+{
+    return ^(NSLayoutAttribute attr) {
+        return [[MASViewAttribute alloc] initWithView:self layoutAttribute:attr];
+    };
+}
+
+#if (__IPHONE_OS_VERSION_MIN_REQUIRED >= 80000) || (__TV_OS_VERSION_MIN_REQUIRED >= 9000) || (__MAC_OS_X_VERSION_MIN_REQUIRED >= 101100)
+
+- (MASViewAttribute *)mas_firstBaseline {
+    return [[MASViewAttribute alloc] initWithView:self layoutAttribute:NSLayoutAttributeFirstBaseline];
+}
+- (MASViewAttribute *)mas_lastBaseline {
+    return [[MASViewAttribute alloc] initWithView:self layoutAttribute:NSLayoutAttributeLastBaseline];
+}
+
+#endif
+
+#if (__IPHONE_OS_VERSION_MIN_REQUIRED >= 80000) || (__TV_OS_VERSION_MIN_REQUIRED >= 9000)
+
+- (MASViewAttribute *)mas_leftMargin {
+    return [[MASViewAttribute alloc] initWithView:self layoutAttribute:NSLayoutAttributeLeftMargin];
+}
+
+- (MASViewAttribute *)mas_rightMargin {
+    return [[MASViewAttribute alloc] initWithView:self layoutAttribute:NSLayoutAttributeRightMargin];
+}
+
+- (MASViewAttribute *)mas_topMargin {
+    return [[MASViewAttribute alloc] initWithView:self layoutAttribute:NSLayoutAttributeTopMargin];
+}
+
+- (MASViewAttribute *)mas_bottomMargin {
+    return [[MASViewAttribute alloc] initWithView:self layoutAttribute:NSLayoutAttributeBottomMargin];
+}
+
+- (MASViewAttribute *)mas_leadingMargin {
+    return [[MASViewAttribute alloc] initWithView:self layoutAttribute:NSLayoutAttributeLeadingMargin];
+}
+
+- (MASViewAttribute *)mas_trailingMargin {
+    return [[MASViewAttribute alloc] initWithView:self layoutAttribute:NSLayoutAttributeTrailingMargin];
+}
+
+- (MASViewAttribute *)mas_centerXWithinMargins {
+    return [[MASViewAttribute alloc] initWithView:self layoutAttribute:NSLayoutAttributeCenterXWithinMargins];
+}
+
+- (MASViewAttribute *)mas_centerYWithinMargins {
+    return [[MASViewAttribute alloc] initWithView:self layoutAttribute:NSLayoutAttributeCenterYWithinMargins];
+}
+
+#endif
+
+#if (__IPHONE_OS_VERSION_MAX_ALLOWED >= 110000) || (__TV_OS_VERSION_MAX_ALLOWED >= 110000)
+
+- (MASViewAttribute *)mas_safeAreaLayoutGuide {
+    return [[MASViewAttribute alloc] initWithView:self item:self.safeAreaLayoutGuide layoutAttribute:NSLayoutAttributeBottom];
+}
+- (MASViewAttribute *)mas_safeAreaLayoutGuideTop {
+    return [[MASViewAttribute alloc] initWithView:self item:self.safeAreaLayoutGuide layoutAttribute:NSLayoutAttributeTop];
+}
+- (MASViewAttribute *)mas_safeAreaLayoutGuideBottom {
+    return [[MASViewAttribute alloc] initWithView:self item:self.safeAreaLayoutGuide layoutAttribute:NSLayoutAttributeBottom];
+}
+- (MASViewAttribute *)mas_safeAreaLayoutGuideLeft {
+    return [[MASViewAttribute alloc] initWithView:self item:self.safeAreaLayoutGuide layoutAttribute:NSLayoutAttributeLeft];
+}
+- (MASViewAttribute *)mas_safeAreaLayoutGuideRight {
+    return [[MASViewAttribute alloc] initWithView:self item:self.safeAreaLayoutGuide layoutAttribute:NSLayoutAttributeRight];
+}
+
+#endif
+
+#pragma mark - associated properties
+
+- (id)mas_key {
+    return objc_getAssociatedObject(self, @selector(mas_key));
+}
+
+- (void)setMas_key:(id)key {
+    objc_setAssociatedObject(self, @selector(mas_key), key, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
+}
+
+#pragma mark - heirachy
+
+- (instancetype)mas_closestCommonSuperview:(MAS_VIEW *)view {
+    MAS_VIEW *closestCommonSuperview = nil;
+
+    MAS_VIEW *secondViewSuperview = view;
+    while (!closestCommonSuperview && secondViewSuperview) {
+        MAS_VIEW *firstViewSuperview = self;
+        while (!closestCommonSuperview && firstViewSuperview) {
+            if (secondViewSuperview == firstViewSuperview) {
+                closestCommonSuperview = secondViewSuperview;
+            }
+            firstViewSuperview = firstViewSuperview.superview;
+        }
+        secondViewSuperview = secondViewSuperview.superview;
+    }
+    return closestCommonSuperview;
+}
+
+@end

Pods/Masonry/Masonry/View+MASShorthandAdditions.h

@@ -0,0 +1,133 @@
+//
+//  UIView+MASShorthandAdditions.h
+//  Masonry
+//
+//  Created by Jonas Budelmann on 22/07/13.
+//  Copyright (c) 2013 Jonas Budelmann. All rights reserved.
+//
+
+#import "View+MASAdditions.h"
+
+#ifdef MAS_SHORTHAND
+
+/**
+ *	Shorthand view additions without the 'mas_' prefixes,
+ *  only enabled if MAS_SHORTHAND is defined
+ */
+@interface MAS_VIEW (MASShorthandAdditions)
+
+@property (nonatomic, strong, readonly) MASViewAttribute *left;
+@property (nonatomic, strong, readonly) MASViewAttribute *top;
+@property (nonatomic, strong, readonly) MASViewAttribute *right;
+@property (nonatomic, strong, readonly) MASViewAttribute *bottom;
+@property (nonatomic, strong, readonly) MASViewAttribute *leading;
+@property (nonatomic, strong, readonly) MASViewAttribute *trailing;
+@property (nonatomic, strong, readonly) MASViewAttribute *width;
+@property (nonatomic, strong, readonly) MASViewAttribute *height;
+@property (nonatomic, strong, readonly) MASViewAttribute *centerX;
+@property (nonatomic, strong, readonly) MASViewAttribute *centerY;
+@property (nonatomic, strong, readonly) MASViewAttribute *baseline;
+@property (nonatomic, strong, readonly) MASViewAttribute *(^attribute)(NSLayoutAttribute attr);
+
+#if (__IPHONE_OS_VERSION_MIN_REQUIRED >= 80000) || (__TV_OS_VERSION_MIN_REQUIRED >= 9000) || (__MAC_OS_X_VERSION_MIN_REQUIRED >= 101100)
+
+@property (nonatomic, strong, readonly) MASViewAttribute *firstBaseline;
+@property (nonatomic, strong, readonly) MASViewAttribute *lastBaseline;
+
+#endif
+
+#if (__IPHONE_OS_VERSION_MIN_REQUIRED >= 80000) || (__TV_OS_VERSION_MIN_REQUIRED >= 9000)
+
+@property (nonatomic, strong, readonly) MASViewAttribute *leftMargin;
+@property (nonatomic, strong, readonly) MASViewAttribute *rightMargin;
+@property (nonatomic, strong, readonly) MASViewAttribute *topMargin;
+@property (nonatomic, strong, readonly) MASViewAttribute *bottomMargin;
+@property (nonatomic, strong, readonly) MASViewAttribute *leadingMargin;
+@property (nonatomic, strong, readonly) MASViewAttribute *trailingMargin;
+@property (nonatomic, strong, readonly) MASViewAttribute *centerXWithinMargins;
+@property (nonatomic, strong, readonly) MASViewAttribute *centerYWithinMargins;
+
+#endif
+
+#if (__IPHONE_OS_VERSION_MAX_ALLOWED >= 110000) || (__TV_OS_VERSION_MAX_ALLOWED >= 110000)
+
+@property (nonatomic, strong, readonly) MASViewAttribute *safeAreaLayoutGuideTop API_AVAILABLE(ios(11.0),tvos(11.0));
+@property (nonatomic, strong, readonly) MASViewAttribute *safeAreaLayoutGuideBottom API_AVAILABLE(ios(11.0),tvos(11.0));
+@property (nonatomic, strong, readonly) MASViewAttribute *safeAreaLayoutGuideLeft API_AVAILABLE(ios(11.0),tvos(11.0));
+@property (nonatomic, strong, readonly) MASViewAttribute *safeAreaLayoutGuideRight API_AVAILABLE(ios(11.0),tvos(11.0));
+
+#endif
+
+- (NSArray *)makeConstraints:(void(^)(MASConstraintMaker *make))block;
+- (NSArray *)updateConstraints:(void(^)(MASConstraintMaker *make))block;
+- (NSArray *)remakeConstraints:(void(^)(MASConstraintMaker *make))block;
+
+@end
+
+#define MAS_ATTR_FORWARD(attr)  \
+- (MASViewAttribute *)attr {    \
+    return [self mas_##attr];   \
+}
+
+@implementation MAS_VIEW (MASShorthandAdditions)
+
+MAS_ATTR_FORWARD(top);
+MAS_ATTR_FORWARD(left);
+MAS_ATTR_FORWARD(bottom);
+MAS_ATTR_FORWARD(right);
+MAS_ATTR_FORWARD(leading);
+MAS_ATTR_FORWARD(trailing);
+MAS_ATTR_FORWARD(width);
+MAS_ATTR_FORWARD(height);
+MAS_ATTR_FORWARD(centerX);
+MAS_ATTR_FORWARD(centerY);
+MAS_ATTR_FORWARD(baseline);
+
+#if (__IPHONE_OS_VERSION_MIN_REQUIRED >= 80000) || (__TV_OS_VERSION_MIN_REQUIRED >= 9000) || (__MAC_OS_X_VERSION_MIN_REQUIRED >= 101100)
+
+MAS_ATTR_FORWARD(firstBaseline);
+MAS_ATTR_FORWARD(lastBaseline);
+
+#endif
+
+#if (__IPHONE_OS_VERSION_MIN_REQUIRED >= 80000) || (__TV_OS_VERSION_MIN_REQUIRED >= 9000)
+
+MAS_ATTR_FORWARD(leftMargin);
+MAS_ATTR_FORWARD(rightMargin);
+MAS_ATTR_FORWARD(topMargin);
+MAS_ATTR_FORWARD(bottomMargin);
+MAS_ATTR_FORWARD(leadingMargin);
+MAS_ATTR_FORWARD(trailingMargin);
+MAS_ATTR_FORWARD(centerXWithinMargins);
+MAS_ATTR_FORWARD(centerYWithinMargins);
+
+#endif
+
+#if (__IPHONE_OS_VERSION_MAX_ALLOWED >= 110000) || (__TV_OS_VERSION_MAX_ALLOWED >= 110000)
+
+MAS_ATTR_FORWARD(safeAreaLayoutGuideTop);
+MAS_ATTR_FORWARD(safeAreaLayoutGuideBottom);
+MAS_ATTR_FORWARD(safeAreaLayoutGuideLeft);
+MAS_ATTR_FORWARD(safeAreaLayoutGuideRight);
+
+#endif
+
+- (MASViewAttribute *(^)(NSLayoutAttribute))attribute {
+    return [self mas_attribute];
+}
+
+- (NSArray *)makeConstraints:(void(NS_NOESCAPE ^)(MASConstraintMaker *))block {
+    return [self mas_makeConstraints:block];
+}
+
+- (NSArray *)updateConstraints:(void(NS_NOESCAPE ^)(MASConstraintMaker *))block {
+    return [self mas_updateConstraints:block];
+}
+
+- (NSArray *)remakeConstraints:(void(NS_NOESCAPE ^)(MASConstraintMaker *))block {
+    return [self mas_remakeConstraints:block];
+}
+
+@end
+
+#endif

Pods/Masonry/Masonry/ViewController+MASAdditions.h

@@ -0,0 +1,30 @@
+//
+//  UIViewController+MASAdditions.h
+//  Masonry
+//
+//  Created by Craig Siemens on 2015-06-23.
+//
+//
+
+#import "MASUtilities.h"
+#import "MASConstraintMaker.h"
+#import "MASViewAttribute.h"
+
+#ifdef MAS_VIEW_CONTROLLER
+
+@interface MAS_VIEW_CONTROLLER (MASAdditions)
+
+/**
+ *	following properties return a new MASViewAttribute with appropriate UILayoutGuide and NSLayoutAttribute
+ */
+@property (nonatomic, strong, readonly) MASViewAttribute *mas_topLayoutGuide;
+@property (nonatomic, strong, readonly) MASViewAttribute *mas_bottomLayoutGuide;
+@property (nonatomic, strong, readonly) MASViewAttribute *mas_topLayoutGuideTop;
+@property (nonatomic, strong, readonly) MASViewAttribute *mas_topLayoutGuideBottom;
+@property (nonatomic, strong, readonly) MASViewAttribute *mas_bottomLayoutGuideTop;
+@property (nonatomic, strong, readonly) MASViewAttribute *mas_bottomLayoutGuideBottom;
+
+
+@end
+
+#endif

Pods/Masonry/Masonry/ViewController+MASAdditions.m

@@ -0,0 +1,39 @@
+//
+//  UIViewController+MASAdditions.m
+//  Masonry
+//
+//  Created by Craig Siemens on 2015-06-23.
+//
+//
+
+#import "ViewController+MASAdditions.h"
+
+#ifdef MAS_VIEW_CONTROLLER
+
+@implementation MAS_VIEW_CONTROLLER (MASAdditions)
+
+- (MASViewAttribute *)mas_topLayoutGuide {
+    return [[MASViewAttribute alloc] initWithView:self.view item:self.topLayoutGuide layoutAttribute:NSLayoutAttributeBottom];
+}
+- (MASViewAttribute *)mas_topLayoutGuideTop {
+    return [[MASViewAttribute alloc] initWithView:self.view item:self.topLayoutGuide layoutAttribute:NSLayoutAttributeTop];
+}
+- (MASViewAttribute *)mas_topLayoutGuideBottom {
+    return [[MASViewAttribute alloc] initWithView:self.view item:self.topLayoutGuide layoutAttribute:NSLayoutAttributeBottom];
+}
+
+- (MASViewAttribute *)mas_bottomLayoutGuide {
+    return [[MASViewAttribute alloc] initWithView:self.view item:self.bottomLayoutGuide layoutAttribute:NSLayoutAttributeTop];
+}
+- (MASViewAttribute *)mas_bottomLayoutGuideTop {
+    return [[MASViewAttribute alloc] initWithView:self.view item:self.bottomLayoutGuide layoutAttribute:NSLayoutAttributeTop];
+}
+- (MASViewAttribute *)mas_bottomLayoutGuideBottom {
+    return [[MASViewAttribute alloc] initWithView:self.view item:self.bottomLayoutGuide layoutAttribute:NSLayoutAttributeBottom];
+}
+
+
+
+@end
+
+#endif

Pods/Masonry/README.md

@@ -0,0 +1,415 @@
+# Masonry [![Build Status](https://travis-ci.org/SnapKit/Masonry.svg?branch=master)](https://travis-ci.org/SnapKit/Masonry) [![Coverage Status](https://img.shields.io/coveralls/SnapKit/Masonry.svg?style=flat-square)](https://coveralls.io/r/SnapKit/Masonry) [![Carthage compatible](https://img.shields.io/badge/Carthage-compatible-4BC51D.svg?style=flat)](https://github.com/Carthage/Carthage) ![Pod Version](https://img.shields.io/cocoapods/v/Masonry.svg?style=flat)
+
+**Masonry is still actively maintained, we are committed to fixing bugs and merging good quality PRs from the wider community. However if you're using Swift in your project, we recommend using [SnapKit](https://github.com/SnapKit/SnapKit) as it provides better type safety with a simpler API.**
+
+Masonry is a light-weight layout framework which wraps AutoLayout with a nicer syntax. Masonry has its own layout DSL which provides a chainable way of describing your NSLayoutConstraints which results in layout code that is more concise and readable.
+Masonry supports iOS and Mac OS X.
+
+For examples take a look at the **Masonry iOS Examples** project in the Masonry workspace. You will need to run `pod install` after downloading.
+
+## What's wrong with NSLayoutConstraints?
+
+Under the hood Auto Layout is a powerful and flexible way of organising and laying out your views. However creating constraints from code is verbose and not very descriptive.
+Imagine a simple example in which you want to have a view fill its superview but inset by 10 pixels on every side
+```obj-c
+UIView *superview = self.view;
+
+UIView *view1 = [[UIView alloc] init];
+view1.translatesAutoresizingMaskIntoConstraints = NO;
+view1.backgroundColor = [UIColor greenColor];
+[superview addSubview:view1];
+
+UIEdgeInsets padding = UIEdgeInsetsMake(10, 10, 10, 10);
+
+[superview addConstraints:@[
+
+    //view1 constraints
+    [NSLayoutConstraint constraintWithItem:view1
+                                 attribute:NSLayoutAttributeTop
+                                 relatedBy:NSLayoutRelationEqual
+                                    toItem:superview
+                                 attribute:NSLayoutAttributeTop
+                                multiplier:1.0
+                                  constant:padding.top],
+
+    [NSLayoutConstraint constraintWithItem:view1
+                                 attribute:NSLayoutAttributeLeft
+                                 relatedBy:NSLayoutRelationEqual
+                                    toItem:superview
+                                 attribute:NSLayoutAttributeLeft
+                                multiplier:1.0
+                                  constant:padding.left],
+
+    [NSLayoutConstraint constraintWithItem:view1
+                                 attribute:NSLayoutAttributeBottom
+                                 relatedBy:NSLayoutRelationEqual
+                                    toItem:superview
+                                 attribute:NSLayoutAttributeBottom
+                                multiplier:1.0
+                                  constant:-padding.bottom],
+
+    [NSLayoutConstraint constraintWithItem:view1
+                                 attribute:NSLayoutAttributeRight
+                                 relatedBy:NSLayoutRelationEqual
+                                    toItem:superview
+                                 attribute:NSLayoutAttributeRight
+                                multiplier:1
+                                  constant:-padding.right],
+
+ ]];
+```
+Even with such a simple example the code needed is quite verbose and quickly becomes unreadable when you have more than 2 or 3 views.
+Another option is to use Visual Format Language (VFL), which is a bit less long winded.
+However the ASCII type syntax has its own pitfalls and its also a bit harder to animate as `NSLayoutConstraint constraintsWithVisualFormat:` returns an array.
+
+## Prepare to meet your Maker!
+
+Heres the same constraints created using MASConstraintMaker
+
+```obj-c
+UIEdgeInsets padding = UIEdgeInsetsMake(10, 10, 10, 10);
+
+[view1 mas_makeConstraints:^(MASConstraintMaker *make) {
+    make.top.equalTo(superview.mas_top).with.offset(padding.top); //with is an optional semantic filler
+    make.left.equalTo(superview.mas_left).with.offset(padding.left);
+    make.bottom.equalTo(superview.mas_bottom).with.offset(-padding.bottom);
+    make.right.equalTo(superview.mas_right).with.offset(-padding.right);
+}];
+```
+Or even shorter
+
+```obj-c
+[view1 mas_makeConstraints:^(MASConstraintMaker *make) {
+    make.edges.equalTo(superview).with.insets(padding);
+}];
+```
+
+Also note in the first example we had to add the constraints to the superview `[superview addConstraints:...`.
+Masonry however will automagically add constraints to the appropriate view.
+
+Masonry will also call `view1.translatesAutoresizingMaskIntoConstraints = NO;` for you.
+
+## Not all things are created equal
+
+> `.equalTo` equivalent to **NSLayoutRelationEqual**
+
+> `.lessThanOrEqualTo` equivalent to **NSLayoutRelationLessThanOrEqual**
+
+> `.greaterThanOrEqualTo` equivalent to **NSLayoutRelationGreaterThanOrEqual**
+
+These three equality constraints accept one argument which can be any of the following:
+
+#### 1. MASViewAttribute
+
+```obj-c
+make.centerX.lessThanOrEqualTo(view2.mas_left);
+```
+
+MASViewAttribute           |  NSLayoutAttribute
+-------------------------  |  --------------------------
+view.mas_left              |  NSLayoutAttributeLeft
+view.mas_right             |  NSLayoutAttributeRight
+view.mas_top               |  NSLayoutAttributeTop
+view.mas_bottom            |  NSLayoutAttributeBottom
+view.mas_leading           |  NSLayoutAttributeLeading
+view.mas_trailing          |  NSLayoutAttributeTrailing
+view.mas_width             |  NSLayoutAttributeWidth
+view.mas_height            |  NSLayoutAttributeHeight
+view.mas_centerX           |  NSLayoutAttributeCenterX
+view.mas_centerY           |  NSLayoutAttributeCenterY
+view.mas_baseline          |  NSLayoutAttributeBaseline
+
+#### 2. UIView/NSView
+
+if you want view.left to be greater than or equal to label.left :
+```obj-c
+//these two constraints are exactly the same
+make.left.greaterThanOrEqualTo(label);
+make.left.greaterThanOrEqualTo(label.mas_left);
+```
+
+#### 3. NSNumber
+
+Auto Layout allows width and height to be set to constant values.
+if you want to set view to have a minimum and maximum width you could pass a number to the equality blocks:
+```obj-c
+//width >= 200 && width <= 400
+make.width.greaterThanOrEqualTo(@200);
+make.width.lessThanOrEqualTo(@400)
+```
+
+However Auto Layout does not allow alignment attributes such as left, right, centerY etc to be set to constant values.
+So if you pass a NSNumber for these attributes Masonry will turn these into constraints relative to the view&rsquo;s superview ie:
+```obj-c
+//creates view.left = view.superview.left + 10
+make.left.lessThanOrEqualTo(@10)
+```
+
+Instead of using NSNumber, you can use primitives and structs to build your constraints, like so:
+```obj-c
+make.top.mas_equalTo(42);
+make.height.mas_equalTo(20);
+make.size.mas_equalTo(CGSizeMake(50, 100));
+make.edges.mas_equalTo(UIEdgeInsetsMake(10, 0, 10, 0));
+make.left.mas_equalTo(view).mas_offset(UIEdgeInsetsMake(10, 0, 10, 0));
+```
+
+By default, macros which support [autoboxing](https://en.wikipedia.org/wiki/Autoboxing#Autoboxing) are prefixed with `mas_`. Unprefixed versions are available by defining `MAS_SHORTHAND_GLOBALS` before importing Masonry.
+
+#### 4. NSArray
+
+An array of a mixture of any of the previous types
+```obj-c
+make.height.equalTo(@[view1.mas_height, view2.mas_height]);
+make.height.equalTo(@[view1, view2]);
+make.left.equalTo(@[view1, @100, view3.right]);
+````
+
+## Learn to prioritize
+
+> `.priority` allows you to specify an exact priority
+
+> `.priorityHigh` equivalent to **UILayoutPriorityDefaultHigh**
+
+> `.priorityMedium` is half way between high and low
+
+> `.priorityLow` equivalent to **UILayoutPriorityDefaultLow**
+
+Priorities are can be tacked on to the end of a constraint chain like so:
+```obj-c
+make.left.greaterThanOrEqualTo(label.mas_left).with.priorityLow();
+
+make.top.equalTo(label.mas_top).with.priority(600);
+```
+
+## Composition, composition, composition
+
+Masonry also gives you a few convenience methods which create multiple constraints at the same time. These are called MASCompositeConstraints
+
+#### edges
+
+```obj-c
+// make top, left, bottom, right equal view2
+make.edges.equalTo(view2);
+
+// make top = superview.top + 5, left = superview.left + 10,
+//      bottom = superview.bottom - 15, right = superview.right - 20
+make.edges.equalTo(superview).insets(UIEdgeInsetsMake(5, 10, 15, 20))
+```
+
+#### size
+
+```obj-c
+// make width and height greater than or equal to titleLabel
+make.size.greaterThanOrEqualTo(titleLabel)
+
+// make width = superview.width + 100, height = superview.height - 50
+make.size.equalTo(superview).sizeOffset(CGSizeMake(100, -50))
+```
+
+#### center
+```obj-c
+// make centerX and centerY = button1
+make.center.equalTo(button1)
+
+// make centerX = superview.centerX - 5, centerY = superview.centerY + 10
+make.center.equalTo(superview).centerOffset(CGPointMake(-5, 10))
+```
+
+You can chain view attributes for increased readability:
+
+```obj-c
+// All edges but the top should equal those of the superview
+make.left.right.and.bottom.equalTo(superview);
+make.top.equalTo(otherView);
+```
+
+## Hold on for dear life
+
+Sometimes you need modify existing constraints in order to animate or remove/replace constraints.
+In Masonry there are a few different approaches to updating constraints.
+
+#### 1. References
+You can hold on to a reference of a particular constraint by assigning the result of a constraint make expression to a local variable or a class property.
+You could also reference multiple constraints by storing them away in an array.
+
+```obj-c
+// in public/private interface
+@property (nonatomic, strong) MASConstraint *topConstraint;
+
+...
+
+// when making constraints
+[view1 mas_makeConstraints:^(MASConstraintMaker *make) {
+    self.topConstraint = make.top.equalTo(superview.mas_top).with.offset(padding.top);
+    make.left.equalTo(superview.mas_left).with.offset(padding.left);
+}];
+
+...
+// then later you can call
+[self.topConstraint uninstall];
+```
+
+#### 2. mas_updateConstraints
+Alternatively if you are only updating the constant value of the constraint you can use the convience method `mas_updateConstraints` instead of `mas_makeConstraints`
+
+```obj-c
+// this is Apple's recommended place for adding/updating constraints
+// this method can get called multiple times in response to setNeedsUpdateConstraints
+// which can be called by UIKit internally or in your code if you need to trigger an update to your constraints
+- (void)updateConstraints {
+    [self.growingButton mas_updateConstraints:^(MASConstraintMaker *make) {
+        make.center.equalTo(self);
+        make.width.equalTo(@(self.buttonSize.width)).priorityLow();
+        make.height.equalTo(@(self.buttonSize.height)).priorityLow();
+        make.width.lessThanOrEqualTo(self);
+        make.height.lessThanOrEqualTo(self);
+    }];
+
+    //according to apple super should be called at end of method
+    [super updateConstraints];
+}
+```
+
+### 3. mas_remakeConstraints
+`mas_updateConstraints` is useful for updating a set of constraints, but doing anything beyond updating constant values can get exhausting. That's where `mas_remakeConstraints` comes in.
+
+`mas_remakeConstraints` is similar to `mas_updateConstraints`, but instead of updating constant values, it will remove all of its constraints before installing them again. This lets you provide different constraints without having to keep around references to ones which you want to remove.
+
+```obj-c
+- (void)changeButtonPosition {
+    [self.button mas_remakeConstraints:^(MASConstraintMaker *make) {
+        make.size.equalTo(self.buttonSize);
+
+        if (topLeft) {
+        	make.top.and.left.offset(10);
+        } else {
+        	make.bottom.and.right.offset(-10);
+        }
+    }];
+}
+```
+
+You can find more detailed examples of all three approaches in the **Masonry iOS Examples** project.
+
+## When the ^&*!@ hits the fan!
+
+Laying out your views doesn't always goto plan. So when things literally go pear shaped, you don't want to be looking at console output like this:
+
+```obj-c
+Unable to simultaneously satisfy constraints.....blah blah blah....
+(
+    "<NSLayoutConstraint:0x7189ac0 V:[UILabel:0x7186980(>=5000)]>",
+    "<NSAutoresizingMaskLayoutConstraint:0x839ea20 h=--& v=--& V:[MASExampleDebuggingView:0x7186560(416)]>",
+    "<NSLayoutConstraint:0x7189c70 UILabel:0x7186980.bottom == MASExampleDebuggingView:0x7186560.bottom - 10>",
+    "<NSLayoutConstraint:0x7189560 V:|-(1)-[UILabel:0x7186980]   (Names: '|':MASExampleDebuggingView:0x7186560 )>"
+)
+
+Will attempt to recover by breaking constraint
+<NSLayoutConstraint:0x7189ac0 V:[UILabel:0x7186980(>=5000)]>
+```
+
+Masonry adds a category to NSLayoutConstraint which overrides the default implementation of `- (NSString *)description`.
+Now you can give meaningful names to views and constraints, and also easily pick out the constraints created by Masonry.
+
+which means your console output can now look like this:
+
+```obj-c
+Unable to simultaneously satisfy constraints......blah blah blah....
+(
+    "<NSAutoresizingMaskLayoutConstraint:0x8887740 MASExampleDebuggingView:superview.height == 416>",
+    "<MASLayoutConstraint:ConstantConstraint UILabel:messageLabel.height >= 5000>",
+    "<MASLayoutConstraint:BottomConstraint UILabel:messageLabel.bottom == MASExampleDebuggingView:superview.bottom - 10>",
+    "<MASLayoutConstraint:ConflictingConstraint[0] UILabel:messageLabel.top == MASExampleDebuggingView:superview.top + 1>"
+)
+
+Will attempt to recover by breaking constraint
+<MASLayoutConstraint:ConstantConstraint UILabel:messageLabel.height >= 5000>
+```
+
+For an example of how to set this up take a look at the **Masonry iOS Examples** project in the Masonry workspace.
+
+## Where should I create my constraints?
+
+```objc
+@implementation DIYCustomView
+
+- (id)init {
+    self = [super init];
+    if (!self) return nil;
+
+    // --- Create your views here ---
+    self.button = [[UIButton alloc] init];
+
+    return self;
+}
+
+// tell UIKit that you are using AutoLayout
++ (BOOL)requiresConstraintBasedLayout {
+    return YES;
+}
+
+// this is Apple's recommended place for adding/updating constraints
+- (void)updateConstraints {
+
+    // --- remake/update constraints here
+    [self.button remakeConstraints:^(MASConstraintMaker *make) {
+        make.width.equalTo(@(self.buttonSize.width));
+        make.height.equalTo(@(self.buttonSize.height));
+    }];
+    
+    //according to apple super should be called at end of method
+    [super updateConstraints];
+}
+
+- (void)didTapButton:(UIButton *)button {
+    // --- Do your changes ie change variables that affect your layout etc ---
+    self.buttonSize = CGSize(200, 200);
+
+    // tell constraints they need updating
+    [self setNeedsUpdateConstraints];
+}
+
+@end
+```
+
+## Installation
+Use the [orsome](http://www.youtube.com/watch?v=YaIZF8uUTtk) [CocoaPods](http://github.com/CocoaPods/CocoaPods).
+
+In your Podfile
+>`pod 'Masonry'`
+
+If you want to use masonry without all those pesky 'mas_' prefixes. Add #define MAS_SHORTHAND to your prefix.pch before importing Masonry
+>`#define MAS_SHORTHAND`
+
+Get busy Masoning
+>`#import "Masonry.h"`
+
+## Code Snippets
+
+Copy the included code snippets to ``~/Library/Developer/Xcode/UserData/CodeSnippets`` to write your masonry blocks at lightning speed!
+
+`mas_make` -> ` [<#view#> mas_makeConstraints:^(MASConstraintMaker *make) {
+     <#code#>
+ }];`
+
+`mas_update` -> ` [<#view#> mas_updateConstraints:^(MASConstraintMaker *make) {
+     <#code#>
+ }];`
+
+`mas_remake` -> ` [<#view#> mas_remakeConstraints:^(MASConstraintMaker *make) {
+     <#code#>
+ }];`
+
+## Features
+* Not limited to subset of Auto Layout. Anything NSLayoutConstraint can do, Masonry can do too!
+* Great debug support, give your views and constraints meaningful names.
+* Constraints read like sentences.
+* No crazy macro magic. Masonry won't pollute the global namespace with macros.
+* Not string or dictionary based and hence you get compile time checking.
+
+## TODO
+* Eye candy
+* Mac example project
+* More tests and examples
+