I want to use this excellent UICollectionView layout: https://github.com/bryceredd/RFQuiltLayout
As expected, it wants me to set my Collection View's layout class to it. This can't be done, because Xcode does not accept RFQuiltLayout in the class field (beeps, and clears the field if I select anything else).
I tried this with a new, empty project too.
What did I wrong?
(Tried in both Xcode 4.2.1/iOS 6 and Xcode 5/iOS 7, OS X Mavericks.)