Subview frame is incorrect when creating UICollectionViewCell
You can get the final frames of your cell by overriding layoutIfNeeded() in your custom Cell class like this:
override func layoutIfNeeded() { super.layoutIfNeeded() self.subView.layer.cornerRadius = self.subView.bounds.width / 2}then in your UICollectionView data Source method cellForRowAtIndexPath: do this:
let cell = collectionView.dequeueReusableCellWithReuseIdentifier("Cell", forIndexPath: indexPath) as! CustomCollectionViewCellcell.setNeedsLayout()cell.layoutIfNeeded()
I had the same issue with a UICollectionViewCell using auto layout constraints.
I had to call layoutIfNeeded before I was configuring my subview that relied on the views frame width.
Had this issue with Core Graphics drawing in iOS 10, Swift 3.0.1.
Add this method to UICollectionView subclass:
override func didMoveToSuperview() { super.didMoveToSuperview() setNeedsLayout() layoutIfNeeded()}My problem was that Core Graphics shapes were not calculated properly, because a layoutSubviews() wasn't called.