瀑布流自定义瀑布流自定义

// // EWWaterFallLayout.h // UICollectionViewDemo // // Created by 丁瀚林 on 2022/7/1. // #import <UIKit/UIKit.h> @class EWWaterFallLayout; @protocol EWWaterFallLayoutDataSource<NSObject> @required /** * 每个item的高度 */ - (CGFloat)waterFallLayout:(EWWaterFallLayout *)waterFallLayout heightForItemAtIndexPath:(NSUInteger)indexPath itemWidth:(CGFloat)itemWidth; @optional /** * 有多少列 */ - (NSUInteger)columnCountInWaterFallLayout:(EWWaterFallLayout *)waterFallLayout; /** * 每列之间的间距 */ - (CGFloat)columnMarginInWaterFallLayout:(EWWaterFallLayout *)waterFallLayout; /** * 每行之间的间距 */ - (CGFloat)rowMarginInWaterFallLayout:(EWWaterFallLayout *)waterFallLayout; /** * 每个item的内边距 */ - (UIEdgeInsets)edgeInsetsInWaterFallLayout:(EWWaterFallLayout *)waterFallLayout; @end @interface EWWaterFallLayout : UICollectionViewLayout /** * 代理 */ @property (nonatomic, weak) id<EWWaterFallLayoutDataSource> delegate; @end