UICollectionView doesn't call delegate methods

Question

I've setup a UICollectionView in a storyboard and connected the dataSource and delegate outlets. I've registered a cell via nib which I dequeue in the cellForItemAtIndexPath: method.

All works perfectly expect that the delegate methods are never called. For example: When touching on a cell, I expect the didSelectItemAtIndexPath: to be called.

I've double-checked the delegate of the collection view - it's assigned correctly.

Does anybody know the reason why the methods are not called?

Answer 1

It's completely my fault. I've added a transparent subview to the front which consumes the touches - a really bad mistake.