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Editorial Team
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Asked: 2026-05-20T11:10:55+00:00

I have a method that I would like to call when a 2 finger

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I have a method that I would like to call when a 2 finger pan gesture is recognized. I have it setup and working ok, but the problem is that there is only about 15 times I need the method to be called (it filters through images), and by the time I’ve panned about an inch, the method has been called a hundred times and the images went by so fast I didn’t know what was going on.

What can I do to slow down my gesture recognizer?

UIPanGestureRecognizer *panRecognizer = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(move:)];
[panRecognizer setMinimumNumberOfTouches:2];
[panRecognizer setMaximumNumberOfTouches:2];
[panRecognizer setDelegate:self];
[self view] addGestureRecognizer:panRecognizer]];
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1 Answer

  1. Editorial Team

    Presumably you’re changing images every time you get a pan event. That’s not very good. Instead you should ask the pan gesture recognizer for the drag distance (use -translationInView:) and only change images once you’ve passed a specific threshold.

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