UICollectionViewLayout各种布局
三种有趣的布局, 线性布局, 圆形布局, 格子布局
App首页布局
@class LMJElementsFlowLayout;
@protocol LMJElementsFlowLayoutDelegate <NSObject>
@required
/**
* 要求实现
*
* @param waterflowLayout 哪个布局需要代理返回大小
* @param indexPath 对应的cell, 的indexPath, 但是indexPath.section == 0
*
* @return 需要代理高度对应的cell的尺寸
*/
- (CGSize)waterflowLayout:(LMJElementsFlowLayout *)waterflowLayout collectionView:(UICollectionView *)collectionView sizeForItemAtIndexPath:(NSIndexPath *)indexPath;
@optional
/**
* 列间距, 默认10
*/
- (CGFloat)waterflowLayout:(LMJElementsFlowLayout *)waterflowLayout collectionView:(UICollectionView *)collectionView columnsMarginForItemAtIndexPath:(NSIndexPath *)indexPath;
/**
* 行间距, 默认10
*/
- (CGFloat)waterflowLayout:(LMJElementsFlowLayout *)waterflowLayout collectionView:(UICollectionView *)collectionView linesMarginForItemAtIndexPath:(NSIndexPath *)indexPath;
/**
* 距离collectionView四周的间距, 默认{20, 10, 10, 10}
*/
- (UIEdgeInsets)waterflowLayout:(LMJElementsFlowLayout *)waterflowLayout edgeInsetsInCollectionView:(UICollectionView *)collectionView;
@end
@interface LMJElementsFlowLayout : UICollectionViewLayout
/** layout的代理 */
- (instancetype)initWithDelegate:(id<LMJElementsFlowLayoutDelegate>)delegate;
+ (instancetype)flowLayoutWithDelegate:(id<LMJElementsFlowLayoutDelegate>)delegate;
@end
水平流水布局
@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
垂直流水布局
@class LMJVerticalFlowLayout;
@protocol LMJVerticalFlowLayoutDelegate <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 width layout内部计算的宽度
*
* @return 需要代理高度对应的cell的高度
*/
- (CGFloat)waterflowLayout:(LMJVerticalFlowLayout *)waterflowLayout collectionView:(UICollectionView *)collectionView heightForItemAtIndexPath:(NSIndexPath *)indexPath itemWidth:(CGFloat)itemWidth;
@optional
/**
* 需要显示的列数, 默认3
*/
- (NSInteger)waterflowLayout:(LMJVerticalFlowLayout *)waterflowLayout columnsInCollectionView:(UICollectionView *)collectionView;
/**
* 列间距, 默认10
*/
- (CGFloat)waterflowLayout:(LMJVerticalFlowLayout *)waterflowLayout columnsMarginInCollectionView:(UICollectionView *)collectionView;
/**
* 行间距, 默认10
*/
- (CGFloat)waterflowLayout:(LMJVerticalFlowLayout *)waterflowLayout collectionView:(UICollectionView *)collectionView linesMarginForItemAtIndexPath:(NSIndexPath *)indexPath;
/**
* 距离collectionView四周的间距, 默认{20, 10, 10, 10}
*/
- (UIEdgeInsets)waterflowLayout:(LMJVerticalFlowLayout *)waterflowLayout edgeInsetsInCollectionView:(UICollectionView *)collectionView;
@end
@interface LMJVerticalFlowLayout : UICollectionViewLayout
/** layout的代理 */
- (instancetype)initWithDelegate:(id<LMJVerticalFlowLayoutDelegate>)delegate;
+ (instancetype)flowLayoutWithDelegate:(id<LMJVerticalFlowLayoutDelegate>)delegate;
@end
