openboy2012 / ddcollectionviewflowlayout Goto Github PK
View Code? Open in Web Editor NEWa CollectionViewFlowLayout implement the Waterfall Effect and support mutiple section
Home Page: http://dwz.cn/IRTpt
ddcollectionviewflowlayout's People
Contributors
Stargazers
Watchers
Forkers
fanzhengfeng lewis180777 xueselangman91 sylarcao monkee wzhifang haiwei-lee lan603168 kerasking liuyunclouder msdgwzhy6 cqiaoyu hasenbaumeister teamlet jianoll overcls xhlinux hnkf sky0372lsk aashouwang niumengfei unclewj lihuiyao1986 myandroid007 longchliu whirlwind fishmwei dingbl wingsraoddcollectionviewflowlayout's Issues
感觉没有必要单独声明一个 Delegate 属性
系统的 Layout 的Delegate是取的 CollectionView.delegate。例如 UICollectionViewFlowLayout 的 delegate 是 UICollectionViewDelegateFlowLayout，并未单独设置 UICollectionViewFlowLayout.delegate ，而是直接用 collectionView.delegate 即可。
header 或者 footer 为nil会导致crash
在使用系统的 FlowLayout 的时候，有实现 header 和 footer 的相关回调：
- (CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout referenceSizeForFooterInSection:(NSInteger)section {
if (section == 0) {
return CGSizeZero;
} else { return CGSizeMake(320, 10); }
}
系统判断，如果高度为0，不会调用 - (UICollectionReusableView *)collectionView:(UICollectionView *)collectionView viewForSupplementaryElementOfKind:(NSString *)kind atIndexPath:(NSIndexPath *)indexPath.
目前的 DDCollectionViewLayout 在 - (NSArray *)layoutAttributesForElementsInRect:(CGRect)rect 中，没有判断 height 为 0 的情况：
// Check footer layout attributes's rectangles if intersectes the collectionView's rectangles.
if ([self.headerFooterItemAttributes[UICollectionElementKindSectionFooter] count] > sectionIdx) {
UICollectionViewLayoutAttributes *footerAttribute = self.headerFooterItemAttributes[UICollectionElementKindSectionFooter][sectionIdx];
BOOL isVisible = CGRectIntersectsRect(rect, footerAttribute.frame);
if (isVisible && footerAttribute)
[itemAttrs addObject:footerAttribute];
self.currentEdgeInsets = UIEdgeInsetsZero;
} else {
self.currentEdgeInsets = [self.sectionInsetses[sectionIdx] UIEdgeInsetsValue];
}
应该修改为
if (isVisible && footerAttribute && footerAttribute.frame.size.height > 0)
header 同理。
滑动时图片会跳变
layout 的 minimumInteritemSpacing 之类的属性不生效
Layout 可以设置默认属性，例如 minimumLineSpacing ，minimumInteritemSpacing，sectionInset 这些可以不通过 delegate 来设置。目前貌似无效。
看到你媳妇照片的一瞬间，你这个朋友我交定了！
collectionView 未设置 numberOfSections 会导致 crash
collectionView 采用datasource 设置 section 数量，那么 self.collectionView.numberOfSections 总是 0，导致后面数组越界引起crash
Recommend Projects
-
React
A declarative, efficient, and flexible JavaScript library for building user interfaces.
-
Vue.js
🖖 Vue.js is a progressive, incrementally-adoptable JavaScript framework for building UI on the web.
-
Typescript
TypeScript is a superset of JavaScript that compiles to clean JavaScript output.
-
TensorFlow
An Open Source Machine Learning Framework for Everyone
-
Django
The Web framework for perfectionists with deadlines.
-
Laravel
A PHP framework for web artisans
-
D3
Bring data to life with SVG, Canvas and HTML. 📊📈🎉
-
Recommend Topics
-
javascript
JavaScript (JS) is a lightweight interpreted programming language with first-class functions.
-
web
Some thing interesting about web. New door for the world.
-
server
A server is a program made to process requests and deliver data to clients.
-
Machine learning
Machine learning is a way of modeling and interpreting data that allows a piece of software to respond intelligently.
-
Visualization
Some thing interesting about visualization, use data art
-
Game
Some thing interesting about game, make everyone happy.
Recommend Org
-
Facebook
We are working to build community through open source technology. NB: members must have two-factor auth.
-
Microsoft
Open source projects and samples from Microsoft.
-
Google
Google ❤️ Open Source for everyone.
-
Alibaba
Alibaba Open Source for everyone
-
D3
Data-Driven Documents codes.
-
Tencent
China tencent open source team.