developmentseed/fingertips — pull request #6 by 0xced (2013-04-22 12:29:31+00:00)
Title: Test touchView class instead of assert

It might happen that other views are added as subviews of the key window, e.g. https://github.com/defagos/CoconutKit/blob/2.0.2/CoconutKit/Sources/Animation/HLSLayerAnimationStep.m#L90
So it is better to just test rather than assert in order not to crash.