Ios （Swift）UIPangestureRecognitor在视图上工作良好，直到将子视图添加到其中

我有以下视图（它是全局视图控制器的子视图）：

这里是我为它设置约束的地方：

// constraints for super view
func setupSuperView() {
    superView.centerXAnchor.constraint(equalTo: view.centerXAnchor).isActive = true
    superView.centerYAnchor.constraint(equalTo: view.centerYAnchor).isActive = true

    superView.widthAnchor.constraint(equalTo: view.widthAnchor, constant: -24).isActive = true
    superView.heightAnchor.constraint(equalTo: view.heightAnchor, constant: -200).isActive = true

    // ISSUE: For some reason, adding this subview with or without constraints screws up the pan functionality of the superview
    superView.addSubview(subView)
}

这是我添加到superView内部的子视图（我将其视为容器视图）：

及其制约因素：

// constraints for yes/no view within superview
func setupSubView() {
    subView.centerXAnchor.constraint(equalTo: superView.centerXAnchor).isActive = true
    subView.centerYAnchor.constraint(equalTo: superView.centerYAnchor).isActive = true
}

最后，这里是我为平移手势建立功能的地方：

 // pan functionality for swiping on superview
func handlePan(gesture: UIPanGestureRecognizer) {

    guard let superview = gesture.view else {
        return
    }

    // point you are tapped on
    let point = gesture.translation(in: view)

    // reference for how far left or right of the center of the superview your pan is
    let xFromCenter = superview.center.x - view.center.x

    // allows the superview to move with your finger
    superview.center = CGPoint(x: view.center.x + point.x, y: view.center.y + point.y)

    // dragged right
    if xFromCenter > 0 {
        subView.image = #imageLiteral(resourceName: "yes")
        subView.tintColor = UIColor.green

    // else dragged left
    } else {
        subView.image = #imageLiteral(resourceName: "no")
        subView.tintColor = UIColor.red
    }

    // when you let go
    if gesture.state == UIGestureRecognizerState.ended {
        // animate superview back to center where it originally was
        UIView.animate(withDuration: 0.2) {

            superview.center = self.view.center
        }
    }

}

在我添加子视图之前（以及当我注释掉它时），平移手势在superview上工作得非常好。但是，当我将子视图约束在superview的中心，并尝试围绕视图控制器移动superview时，它的行为会很奇怪（只是正确地向左移动，向右移动时会不断地回缩到中心）

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非常感谢您提供的任何帮助。

在您的子视图上禁用

用户交互

，我想它会工作的

你的代码应该是这样的

  subView.isUserInteractionEnabled = false

---

我解决了这个问题。虽然我不知道这是修复的原因，但问题在于，我用于向左平移容器视图的“否”选项的图像导致整个视图的行为异常，因为它是一个不同的图像

我通过将两个选项都设置为“是”来测试这一点，不管您是向左还是向右平移视图。这修复了一个问题，使我相信问题在于图像切换取决于向左还是向右滑动。我不知道为什么它在显示两个不同的图像时会出现问题，但我也会设法解决这个问题

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感谢您的所有有用的输入

尝试将panGesture添加到下面的superView

superView。addSubview（subView）

Function您的意思是一旦添加子视图，您的pan手势就停止工作了吗？@Lion正确，一旦我将我的子视图添加到superView，平移手势将停止正常工作。如果您将

uiview

或

uiimageview

添加为子视图，则将其用户交互设置为

false

，它将正常工作think@AravindAR试过了,，不幸的是，我仍然遇到同样的问题。我尝试了这个，但不幸的是，我仍然遇到同样的问题。

 // pan functionality for swiping on superview
func handlePan(gesture: UIPanGestureRecognizer) {

    guard let superview = gesture.view else {
        return
    }

    // point you are tapped on
    let point = gesture.translation(in: view)

    // reference for how far left or right of the center of the superview your pan is
    let xFromCenter = superview.center.x - view.center.x

    // allows the superview to move with your finger
    superview.center = CGPoint(x: view.center.x + point.x, y: view.center.y + point.y)

    // dragged right
    if xFromCenter > 0 {
        subView.image = #imageLiteral(resourceName: "yes")
        subView.tintColor = UIColor.green

    // else dragged left
    } else {
        subView.image = #imageLiteral(resourceName: "no")
        subView.tintColor = UIColor.red
    }

    // when you let go
    if gesture.state == UIGestureRecognizerState.ended {
        // animate superview back to center where it originally was
        UIView.animate(withDuration: 0.2) {

            superview.center = self.view.center
        }
    }

}

  subView.isUserInteractionEnabled = false