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UIPanGestureRecognizer translationInView returns different values ​​on iPhone / ipad

Hi I have this code of code in my project,

- (void)scrollViewWillBeginDragging:(UIScrollView *)scrollView {
    CGPoint translation = [scrollView.panGestureRecognizer translationInView:scrollView];
    if(translation.x < 0.0f) {
        // Something
    }
}

and it works great on iPhone but for some reason on iPad my CGPoint always returns (0,0). Any ideas as to why?

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1 answer


I had the same problem and came up with a nasty workaround using a method instead velocityInView()

. I don't have a real iPad, so I suspect the problem may actually be with the simulator.

Objective-C:

CGPoint velocity = [scrollView.panGestureRecognizer velocityInView: scrollView];
CGPoint translation = CGPointMake(velocity.x * 0.1, velocity.y * 0.1);


Swift:

let translation = scrollView.panGestureRecognizer.velocityInView(self) * 0.1

I am using the very handy CGPoint extension, you can find it right here.

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