https://github.com/zhangyanlf/lottery
瀑布流
https://github.com/zhangyanlf/lottery
Last synced: 3 months ago
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瀑布流
- Host: GitHub
- URL: https://github.com/zhangyanlf/lottery
- Owner: zhangyanlf
- Created: 2018-03-15T02:06:59.000Z (about 7 years ago)
- Default Branch: master
- Last Pushed: 2018-03-16T09:08:26.000Z (about 7 years ago)
- Last Synced: 2025-01-09T14:40:20.019Z (4 months ago)
- Language: Objective-C
- Size: 4.97 MB
- Stars: 0
- Watchers: 1
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
Awesome Lists containing this project
README
# Lottery
瀑布流
# 自定义布局
``` iOS
/**
初始化
*/
- (void)prepareLayout
{
[super prepareLayout];
//清楚之前的
[self.attriArray removeAllObjects];
//开始创建每一个cell对应的布局属性
NSInteger count = [self.collectionView numberOfItemsInSection:0];
for (NSInteger i = 0; i < count; i++) {
//创建位置
NSIndexPath *indexPath = [NSIndexPath indexPathForRow:i inSection:0];
//获取indexPath位置cell对应的布局属性
UICollectionViewLayoutAttributes *attri = [self layoutAttributesForItemAtIndexPath:indexPath];
[self.attriArray addObject:attri];
}
}
/**
决定cell的排序
*/
- (NSArray *)layoutAttributesForElementsInRect:(CGRect)rect
{
NSLog(@"%s",__func__);
return self.attriArray;
}
/**
返回indexPath 位置 cell对应的布局属性
*/
- (UICollectionViewLayoutAttributes *)layoutAttributesForItemAtIndexPath:(NSIndexPath *)indexPath
{
//创建布局属性
UICollectionViewLayoutAttributes *attri = [UICollectionViewLayoutAttributes layoutAttributesForCellWithIndexPath:indexPath];
//设置布局属性的frame
attri.frame = CGRectMake(arc4random_uniform(300), arc4random_uniform(300), arc4random_uniform(300), arc4random_uniform(300));
return attri;
}
- (CGSize)collectionViewContentSize
{
return CGSizeMake(0, 1000);
}
```
# 自定义接口 -- 通过代理方法 实现 瀑布流布局 （高度/行数/间距等）
``` iOS
@protocol ZFWaterflowLayoutDelegate
@required
- (CGFloat)waterflowLayout:(ZFWaterflowLayout *)waterflowLayout heightForItemAtIndexPath:(NSInteger )index itemWidth:(CGFloat)itemWidth;
@optional
/**
每一列的行数
@param waterFlowerLayout waterFlowerLayout
@return 返回行数 默认3行
*/
- (NSInteger) columnCountInWaterFlowerLayout:(ZFWaterflowLayout *)waterFlowerLayout;
/**
每一列的间距
@param waterFlowerLayout waterFlowerLayout
@return 返回列间距 默认 10
*/
- (CGFloat) columnMarginInWaterFlowerLayout:(ZFWaterflowLayout *)waterFlowerLayout;
/**
每一行的间距
@param waterFlowerLayout waterFlowerLayout
@return 返回行间距 默认 10
*/
- (CGFloat) rowMarginInWaterFlowerLayout:(ZFWaterflowLayout *)waterFlowerLayout;
/**
边缘距离
@param waterFlowerLayout waterFlowerLayout
@return 返回边缘距离 默认为 {10,10,10,10}
*/
- (UIEdgeInsets) edgeInsetsInWaterFlowerLayout:(ZFWaterflowLayout *)waterFlowerLayout;
@end
```
# 