Add swipe-up gesture recognizer to a modal view

user_8076266 0
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I want to add a swipe-up recognizer to a view that has been presented modally. However, it seems like swipe-up and swipe-down gestures are reserved for view dismissal in modally presented views. When I set the recognizer to recognize left or right swipe, it works just fine but when I set it to recognize upwards swipe, it doesn't work. How can I get around with this problem?

swift ios
1 Answers

Add delegates and override the gesture:

class VC2: UIViewController {
    

    override func viewDidLoad() {
        super.viewDidLoad()
        let direction: UISwipeGestureRecognizer.Direction = .up
        let gesture = UISwipeGestureRecognizer(target: self, action: #selector(swipeAction(sender:)))
        gesture.direction = direction
        gesture.delegate = self
        self.view.addGestureRecognizer(gesture)
    }
    
    @objc func swipeAction(sender: UISwipeGestureRecognizer) {
       print(sender.direction)
     }
}

extension VC2: UIGestureRecognizerDelegate {
    func gestureRecognizerShouldBegin(_ gestureRecognizer: UIGestureRecognizer) -> Bool {
        return true
    }

    func gestureRecognizer(_ gestureRecognizer: UIGestureRecognizer, shouldRequireFailureOf otherGestureRecognizer: UIGestureRecognizer) -> Bool {
        return false
    }

    func gestureRecognizer(_ gestureRecognizer: UIGestureRecognizer, shouldBeRequiredToFailBy otherGestureRecognizer: UIGestureRecognizer) -> Bool {
        return true
    }

    func gestureRecognizer(_ gestureRecognizer: UIGestureRecognizer, shouldRecognizeSimultaneouslyWith otherGestureRecognizer: UIGestureRecognizer) -> Bool {
        return true
    }
}
user_65763150
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