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I am working on a sample of Pan Gesture. I am keen to know that can I add single gesture on two views?

My code is as follows:

UIPanGestureRecognizer *panGesture = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(invokePanGesture:)]; [panGesture setMinimumNumberOfTouches:1]; [panGesture setMaximumNumberOfTouches:2]; [btnGreen addGestureRecognizer:panGesture]; [btnYellow addGestureRecognizer:panGesture];

my handler method is as follows:

- (void)invokePanGesture:(UIPanGestureRecognizer*)recognizer { CGPoint translation = [recognizer translationInView:self.view]; recognizer.view.center = CGPointMake(recognizer.view.center.x + translation.x, recognizer.view.center.y + translation.y); [recognizer setTranslation:CGPointMake(0, 0) inView:self.view]; }

The problem now is gesture recognizer is considering only last view in my case btnYellow as its view. If I create two separate GestureRecognizer object it works. So please clear me that:

  1. Is it possible to have single gesture in multiple views or not?

  2. If yes then how?

  3. If now then why?

Thanks in Advance

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From the docs for UIGestureRecognizer

A gesture recognizer operates on touches hit-tested to a specific view and all of that view’s subviews. It thus must be associated with that view. To make that association you must call the UIView method addGestureRecognizer:. A gesture recognizer does not participate in the view’s responder chain.

So, in summary the only way a GestureRecognizer can operate on more than one view is if the recognizer operates on a superview of the other views.

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I don't think it's possible.

Please have a look at https://stackoverflow.com/a/5567684/470964.

Also https://stackoverflow.com/a/7883902/470964: Maybe it's also a solution for your problem. I think the answer is that the GestureRecognizer has only one view property, that will be set.

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Can't you just write your invokePanGesture method to do the same thing to both views at the same time?

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I can't because I want to know that on which view the gesture is invoked and move that view only. If I do the same you are saying than it won't work. It will keep the both view object with same frame according to you.
Then why use a single gesture recognizer?

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