ios - ScrollView 平移手势与 panGestureRecognizer 之间的冲突

Question

我在 UIViewController 中有一个 UIScrollView，它由 segue 模态显示，另外一个 UIPanGestureRecognizer 确实关闭了 View Controller 平底锅。此手势仅在

 scrollView.contentOffset.y == 0

问题是，现在两个平移手势相互冲突，我不能再 ScrollView 了。

为了解决这个问题，我尝试使用 gestureRecognizer(_: shouldRecognizeSimultaneouslyWith:) 方法，返回是，而且，我尝试将我的自定义平移手势添加到 UIScrollView 像这样平移手势识别器:

 scrollView.panGestureRecognizer.addTarget(self, action: #selector(handlePanGesture(_:)))

但是这些并不能解决问题如果您知道如何解决此问题，我将不胜感激。

已编辑

这是我关闭 View Controller 的平移手势的代码:

     @IBAction func handlePanGesture(_ sender: UIPanGestureRecognizer) {
    let percentThreshold: CGFloat = 0.3

    if scrollView.contentOffset.y == 0 {
        let translation = sender.translation(in: view)
        let verticalMovement = translation.y / view.bounds.height
        let downwardMovement = fmaxf(Float(verticalMovement), 0.0)
        let downwardMovementPercent = fminf(downwardMovement, 1.0)
        let progress = CGFloat(downwardMovementPercent)

        guard let interactor = interactor else {return}
        switch sender.state {
        case .began:
            interactor.hasStarted = true
            dismiss(animated: true, completion: nil)
        case .changed:
            interactor.shouldFinish = progress > percentThreshold
            interactor.update(progress)
        case .cancelled:
            interactor.hasStarted = false
            interactor.cancel()
        case .ended:
            interactor.hasStarted = false
            interactor.shouldFinish ? interactor.finish() : interactor.cancel()
        default:
            break
        }

    }
}

EDITED_2以下是 Interactor 的代码:

class Interactor: UIPercentDrivenInteractiveTransition {
var hasStarted = false
var shouldFinish = false 

附言我知道有很多类似的问题，但它们对我不起作用。

Answer 1

要在 UIPanGestureRecognizer 在 ScrollView 上时允许滚动，您需要创建一个 UIGestureRecognizerDelegate，它在 gestureRecognizer(_:shouldRecognizeSimultaneouslyWith:) 上返回 true >

如果不这样做，将无法在 ScrollView 上滚动。

这样做是这样的:

let scrollViewPanGesture = UIPanGestureRecognizer(target: self, action: #selector(onPan(_:)))
scrollViewPanGesture.delegate = self
scrollView.addGestureRecognizer(scrollViewPanGesture)

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