//
|
// LMJHorizontalFlowLayout.h
|
// 瀑布流完善接口
|
//
|
// Created by apple on 16/7/31.
|
// Copyright © 2016年 NJHu. All rights reserved.
|
//
|
|
#import <UIKit/UIKit.h>
|
|
|
@class LMJHorizontalFlowLayout;
|
|
|
@protocol LMJHorizontalFlowLayoutDelegate <NSObject>
|
|
@required
|
/**
|
* 要求实现
|
*
|
* @param waterflowLayout 哪个布局需要代理返回高度
|
* @param indexPath 对应的cell, 的indexPath, 但是indexPath.section == 0
|
* @param itemHeight layout内部计算的高度
|
*
|
* @return 需要代理高度对应的cell的宽度
|
*/
|
- (CGFloat)waterflowLayout:(LMJHorizontalFlowLayout *)waterflowLayout collectionView:(UICollectionView *)collectionView widthForItemAtIndexPath:(NSIndexPath *)indexPath itemHeight:(CGFloat)itemHeight;
|
@optional
|
|
/**
|
* 需要显示的行数, 默认3
|
*/
|
- (NSInteger)waterflowLayout:(LMJHorizontalFlowLayout *)waterflowLayout linesInCollectionView:(UICollectionView *)collectionView;
|
|
/**
|
* 列间距, 默认10
|
*/
|
- (CGFloat)waterflowLayout:(LMJHorizontalFlowLayout *)waterflowLayout collectionView:(UICollectionView *)collectionView columnsMarginForItemAtIndexPath:(NSIndexPath *)indexPath;
|
|
/**
|
* 行间距, 默认10
|
*/
|
- (CGFloat)waterflowLayout:(LMJHorizontalFlowLayout *)waterflowLayout linesMarginInCollectionView:(UICollectionView *)collectionView;
|
|
/**
|
* 距离collectionView四周的间距, 默认{10, 10, 10, 10}
|
*/
|
- (UIEdgeInsets)waterflowLayout:(LMJHorizontalFlowLayout *)waterflowLayout edgeInsetsInCollectionView:(UICollectionView *)collectionView;
|
|
|
@end
|
|
|
|
@interface LMJHorizontalFlowLayout : UICollectionViewLayout
|
|
/** layout的代理 */
|
- (instancetype)initWithDelegate:(id<LMJHorizontalFlowLayoutDelegate>)delegate;
|
|
+ (instancetype)flowLayoutWithDelegate:(id<LMJHorizontalFlowLayoutDelegate>)delegate;
|
@end
|
