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UICollectionView #82

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ShannonChenCHN opened this issue Aug 4, 2017 · 4 comments
Open

UICollectionView #82

ShannonChenCHN opened this issue Aug 4, 2017 · 4 comments
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@ShannonChenCHN
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@ShannonChenCHN ShannonChenCHN mentioned this issue Aug 4, 2017
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ShannonChenCHN commented Aug 4, 2017 •
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ShannonChenCHN commented Jan 5, 2018 •
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常见问题 1：iOS 11 中， UICollectionView 的 scroll indicator 会被 section header 遮住

解决方案：将 section header 的 zIndex 设为 0。

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ShannonChenCHN commented Jan 22, 2018 •
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常见问题 2：如何实现 UICollectionView 的以 cell 宽度为页宽的 Paging 效果（而不是以屏幕宽度为页宽）？

问题：设置 pagingEnabled 属性只能实现 以屏幕宽度为页宽 的paging 效果。

解决方案一：重写 - (void)scrollViewWillEndDragging:(UIScrollView *)scrollView withVelocity:(CGPoint)velocity targetContentOffset:(inout CGPoint *)targetContentOffset 方法，自己手动实现手指拖动停止后的惯性滑动位移。

解决方案二：自定义 UICollectionViewFlowLayout 子类，重写 - (CGPoint)targetContentOffsetForProposedContentOffset:(CGPoint)offset withScrollingVelocity:(CGPoint)velocity 方法，重新计算 targetContentOffset。

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ShannonChenCHN commented May 15, 2018 •
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如何自定义 UICollectionView 子类？

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