58 lines
2.3 KiB
Mathematica
58 lines
2.3 KiB
Mathematica
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// ZLCollectionReusableView.m
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// ZLCollectionView
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//
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// Created by zhaoliang chen on 2018/7/9.
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// Copyright © 2018年 zhaoliang chen. All rights reserved.
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//
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#import "ZLCollectionReusableView.h"
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#import "ZLCollectionViewLayoutAttributes.h"
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@interface ZLCollectionReusableView ()
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@property(nonatomic,strong)UIImageView* ivBackground;
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@end
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@implementation ZLCollectionReusableView
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- (instancetype)initWithFrame:(CGRect)frame {
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if (self == [super initWithFrame:frame]) {
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self.translatesAutoresizingMaskIntoConstraints = NO;
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[self addSubview:self.ivBackground];
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self.ivBackground.translatesAutoresizingMaskIntoConstraints = NO;
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[self addConstraints:@[
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[NSLayoutConstraint constraintWithItem:self.ivBackground attribute:NSLayoutAttributeLeft relatedBy:NSLayoutRelationEqual toItem:self attribute:NSLayoutAttributeLeft multiplier:1.0 constant:0.0],
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[NSLayoutConstraint constraintWithItem:self.ivBackground attribute:NSLayoutAttributeRight relatedBy:NSLayoutRelationEqual toItem:self attribute:NSLayoutAttributeRight multiplier:1.0 constant: 0.0],
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[NSLayoutConstraint constraintWithItem:self.ivBackground attribute:NSLayoutAttributeTop relatedBy:NSLayoutRelationEqual toItem:self attribute:NSLayoutAttributeTop multiplier:1.0 constant: 0.0],
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[NSLayoutConstraint constraintWithItem:self.ivBackground attribute:NSLayoutAttributeBottom relatedBy:NSLayoutRelationEqual toItem:self attribute:NSLayoutAttributeBottom multiplier:1.0 constant: 0.0]
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]];
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}
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return self;
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}
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- (void)applyLayoutAttributes:(UICollectionViewLayoutAttributes *)layoutAttributes {
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[super applyLayoutAttributes:layoutAttributes];
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//设置背景颜色
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ZLCollectionViewLayoutAttributes *ecLayoutAttributes = (ZLCollectionViewLayoutAttributes*)layoutAttributes;
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if (ecLayoutAttributes.color) {
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self.backgroundColor = ecLayoutAttributes.color;
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}
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if (ecLayoutAttributes.image) {
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self.ivBackground.image = ecLayoutAttributes.image;
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}
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}
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- (UIImageView*)ivBackground {
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if (!_ivBackground) {
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_ivBackground = [[UIImageView alloc]init];
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_ivBackground.contentMode = UIViewContentModeScaleAspectFill;
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_ivBackground.backgroundColor = [UIColor clearColor];
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}
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return _ivBackground;
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}
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@end
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