I'm trying to recognize left/right swipe gesture in a UIScrollView. I've tried to create UISwipeGestureRecognizers and associate them with the scroll view. It works but very rarely. Most of the time I do not get called. Why?
How can I reliably get swiping left/right to work? Can I use the gesture recognizers or do I have to somehow handle it myself in touchesBegan/Ended
Thanks
For those who want to animate and customize their swipe gesture recognizers.
We can use UIScrollView and UIGestureRecognizer delegates:
Class ViewController: UIViewController, UISCrollViewDelegate, UIGestureRecognizerDelegate {
override func viewDidLoad() {
super.viewDidLoad()
scrollView.delegate = self
swipeLeft.delegate = self
swipeRight.delegate = self
}
func gestureRecognizer(_ gestureRecognizer: UIGestureRecognizer, shouldReceive touch: UITouch) -> Bool {
return true
}
func gestureRecognizer(_ gestureRecognizer: UIGestureRecognizer, shouldRecognizeSimultaneouslyWith otherGestureRecognizer: UIGestureRecognizer) -> Bool {
return true
}
func gestureRecognizerShouldBegin(_ gestureRecognizer: UIGestureRecognizer) -> Bool {
return scrollView.alwaysBounceHorizontal
}
func scrollViewWillEndDragging(_ scrollView: UIScrollView, withVelocity velocity: CGPoint, targetContentOffset: UnsafeMutablePointer<CGPoint>) {
// Your custom animation at the end of scrolling.
}
}