UICollectionView only calling didSelectItemAtIndexPath if user double taps, will not call when user single taps

Question

I have a UICollectionView which is about the size of the screen. The UICollectionViewCells that it displays are the same size as the collectionView. Each cell has a UIImage

Answer 1

In my case it was just

self.collectionView.allowsSelection  =NO;

I had in code.

changing to

self.collectionView.allowsSelection  =YES;

fix it.