问题
I have a UICollectionView set up in which I have cells. I want to tap these cells to play a sound, and also have the ability to drag these cells into a different view to drop those sounds in.
To play sounds, I use the -collectionView:collectionView didSelectItemAtIndexPath method. And to implement the drag functionality, I used custom login in the touchesBegan, touchesMoved etc. methods.
However, if I have the methods touchesBegan, touchesMoved, the UICollectionView delegate methods never get called. Is there a way I can delay the touch events being delivered until the delegate methods have failed? Or if I use touch events, do I have to implement custom logic to detect a tap on cell too?
来源：https://stackoverflow.com/questions/21329277/touch-events-on-uicollectionview-causing-delegate-methods-to-not-be-called