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iosswiftuiscrollviewswipe

Disable UIScrollView inertia (scrollViewDidEndDecelerating) Swift

Setup: I have a Scroll View that works great horizontally as well as a UISwipeGestureRecognizer that triggers a segue to another view when I swipe down.

Problem: If I am scrolling horizontally and I begin to swipe down (vertical scrolling disabled) WHILE the scrolling is decelerating, the swipe down action (segue) does not execute. It only works once the scrolling deceleration is complete.

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Is there a way to disable the scroll deceleration (aka inertia) so that my swipe down gesture can be detected instantly? Perhaps there's a workaround to force UISwipeGestureRecognizer to be detected first?

Solutions in Swift are highly appreciated!

Solution

  • UIScrollView has a pinchGestureRecognizer and a panGestureRecognizer.If you have a UISwipeGestureRecognizer,the gesture will most likely be recognized as a UIPanGestureRecognizer.
    You can add a dependence to solve the problem:

    scrollView.panGestureRecognizer.requireGestureRecognizerToFail(swipeGesture)