I have an UICollectionView. When I touch one of the cells I present a popover view from its location with the arrow pointing to the cell with some extra information about the cell.I have an UICollectionView. When I touch one of
阅读背景：
在屏幕旋转后如何在UICollectionView中跟踪一个单元的移动?
来源：互联网
分享到：
