ryanmeisters/UIView-DragDrop — pull request #4 by jakubknejzlik (2014-11-08 23:21:14+00:00)
Title: UIViewDragDropDelegate optional methods

In protocol declaration of UIViewDragDropDelegate all methods are marked as optional, but these three has to be implemented (are called without checking if implemented):

(void) view:(UIView *)view wasDroppedOnDropView:(UIView *)drop;

(void) draggingDidBeginForView:(UIView*)view;

(void) draggingDidEndWithoutDropForView:(UIView*)view;