ios - 在UICollectionView的cell中添加subView不显示的问题

Question

在cellForItemAtIndexPath方法中
var videoView = videos["video"] as UIView
videoView.frame = cell.frame
self.collectionView.addSubview(videoView)

如果我设置了 videoView.frame = cell.frame 这句，那么这个subview 就不会显示

我修改了frame（包含在cell中）

var videoView = videos["video"] as UIView
videoView.frame = videoView.frame = CGRect(x: 37, y: 94, width: 100, height: 100)
self.collectionView.addSubview(videoView)

这样就显示了

请问这是什么原因？

Answer 1

Print out videoView.frame = cell.frame in cell.frame and you will know~

Answer 2

Set a breakpoint at cellForItemAtIndexPath and check whether cell.frame is what you expected. But why not use auto layout