UICollectionViewCell gets hidden randomly

Question

I have a UIView in which I am adding a UICollectionView to act as a banner view to look like a carousel. The Viewcontroller in which UIView

Answer 1

I've encountered the same problem.

After

• checking if the UICollectionView reloadData was called in some thread other than the MainThread
• checking if there is any cases about multi-calling reloadData or updateconstraints

without solving my problem, I realized that in some occasions CGSizeZero was returned for collectionView:layout:sizeForItemAtIndexPath:.

When avoiding the CGSizeZero result, everything works well.