UIPanGestureRecognizer does not switch to state “End” or “Cancel” if user panned x and y in negative direction

Question

I\'ve got a little problem with the UIPanGestureRecognizer. The Recognizer does not report the UIGestureRecognizerStateEnded state if the user panned to the top left (means nega

Answer 1

The line

[self addGestureRecognizer:pan];

looks wrong to me.

It seems like you are creating the gesture recognizer from inside a UIView and not a UIViewController. So if the view is dealloc both it and the gesture recognizer will disappear.

Better to create the gesture recognizer from the UIViewController. Also the UIViewController needs to keep a strong point to the recognizer.