CollectionView sizeForItemAtIndexPath never called

Question

This is driving me crazy! I have a UICollectionViewController as shown below:

class PhrasesCompactCollectionViewController: UICollectionViewController 

The numberOfSections and cellForItemAt are being called but the sizeForItemAtIndexPath is never called. I am using the same exact code somewhere else and it fires correctly. I am using Xcode 8 Beta 6.

func collectionView(collectionView: UICollectionView,                         layout collectionViewLayout: UICollectionViewLayout,                         sizeForItemAtIndexPath indexPath:  NSIndexPath) -> CGSize {          return CGSize(width: 120, height:120)      } 

Answer 1

You need to specify that you implement the protocol UICollectionViewDelegateFlowLayout in your class declaration.

class PhrasesCompactCollectionViewController: UICollectionViewController, UICollectionViewDelegateFlowLayout

Answer 2

I had the same problem. The one thing that helped me was to make the 'Estimated Size' for the Cell Size under the collectionView size inspector 'None'.