Detecting Pan Gesture End

Question

I've got a view and I applied a UIPanGestureRecogniser to this view:

UIPanGestureRecognizer *panGesture = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(panAnim:)]; [sliderView addGestureRecognizer:panGesture]; [panGesture release]; 

I can detect and process the gesture just fine. However, I wish to initiate another method once the gesture has ended.

I know there are two methods that allow this kind of detection. touchesEnded and touchesCancelled however, I've found that touchesCancelled gets called as soon as the touch becomes a gesture i.e. I move my finger enough to warrant a gesture call and touchesEnded rarely, if ever, gets called.

I want to be able to pan left / right and then initiate another function call upon gesture ending. How do I do this?

Answer 1

Pan gesture end event can be detected by checking its state with UIGestureRecognizerStateEnded.

Check with the below code .

-(void) panAnim:(UIPanGestureRecognizer*) gestureRecognizer {    if(gestureRecognizer.state == UIGestureRecognizerStateEnded)    {       //All fingers are lifted.    } } 

From Apple documentation

A panning gesture is continuous. It begins (UIGestureRecognizerStateBegan) when the minimum number of fingers allowed (minimumNumberOfTouches) has moved enough to be considered a pan. It changes (UIGestureRecognizerStateChanged) when a finger moves while at least the minimum number of fingers are pressed down. It ends (UIGestureRecognizerStateEnded) when all fingers are lifted.

Read more about UIPanGestureRecognizer

Answer 2

Pan gesture end event can be detected by checking the it's state with UIGestureRecognizerStateEnded or UIGestureRecognizerStateCancelled or UIGestureRecognizerStateFailed

Check with the below code .

   -(void) panGesture:(UIPanGestureRecognizer*) gestureRecognizer     {      if(gestureRecognizer.state == UIGestureRecognizerStateEnded || gestureRecognizer.state == UIGestureRecognizerStateFailed || gestureRecognizer.state == UIGestureRecognizerStateCancelled)              {                 //code what you want.              }      }