The problem is:
When the screen orientation changed, the UIPanPressGestureRecognizer state will always be changed to UIGestureRecognizerStateCancelled and make this gesture invalid.But i found the gestures in the Photos didn't, when i was dragging the listview of photos(i think it is a UICollectionView) and rotated my iPhone, the screen orientation will no be changed Immediately unless i stopped my dragging.How to do this?
Is there any way of avoiding this? Or is there some other approach of doing it?
Thank you very much!