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Pods/CRBoxInputView/PodCode/Classes/CRBoxFlowLayout.m

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+//
+//  CRBoxFlowLayout.m
+//  CaiShenYe
+//
+//  Created by Chobits on 2019/1/3.
+//  Copyright © 2019 Chobits. All rights reserved.
+//
+
+#import "CRBoxFlowLayout.h"
+
+@implementation CRBoxFlowLayout
+
+- (instancetype)init
+{
+    self = [super init];
+    
+    if (self) {
+        [self initPara];
+    }
+    
+    return self;
+}
+
+- (void)initPara
+{
+    self.ifNeedEqualGap = YES;
+    self.scrollDirection = UICollectionViewScrollDirectionHorizontal;
+    self.minimumLineSpacing = 0;
+    self.minimumInteritemSpacing = 0;
+    self.sectionInset = UIEdgeInsetsZero;
+    self.itemNum = 1;
+}
+
+- (void)prepareLayout
+{
+    if (_ifNeedEqualGap) {
+        [self autoCalucateLineSpacing];
+    }
+    
+    [super prepareLayout];
+}
+
+- (void)autoCalucateLineSpacing
+{
+    if (self.itemNum > 1) {
+        CGFloat width = CGRectGetWidth(self.collectionView.frame);
+        self.minimumLineSpacing = floor(1.0 * (width - self.itemNum * self.itemSize.width) / (self.itemNum - 1));
+    }else{
+        self.minimumLineSpacing = 0;
+    }
+}
+
+@end