deletePhotoImage Crash!!

[keasonHuang]

deletePhotoImage Crash
When I change the UICollectionViewDelegateFlowLayout code:

Changed Code
return CGSize(width: collectionView.bounds.width/4, height: collectionView.bounds.height/4)

Origin Code:
return CGSize(width: collectionView.bounds.width, height: collectionView.bounds.height)