Ios UIview的起始中心错误。（假视觉）

视频说明：

我有一个UIView，您可以将其拖动到另一个视图的中心以执行操作。该视图应具有来自中心视图+24的前导约束

在较大的iphone（iPhone8）上打印的起始中心X值约为324

在iphone 5s和其他一些较小的手机上，视图似乎放在了正确的位置，但一旦我移动视图，它就会弹回到错误的位置。.ended PanGesture将使其捕捉到其起始中心X值

我在324处打印它的起始值，但一旦我移动它，它就会捕捉到屏幕右侧的324

这是什么原因造成的？为什么一开始它似乎位于正确的位置

Pangesture检查按钮如下：

@objc func checkButtonWasDragged(_ sender: UIPanGestureRecognizer) {

    if sender.state == UIGestureRecognizerState.began || sender.state == UIGestureRecognizerState.changed {
        self.view.bringSubview(toFront: checkButton)
        let translation = sender.translation(in: self.view)
        checkButton.center = CGPoint(x: checkButton.center.x + translation.x, y: checkButton.center.y)
        print(checkButton.center.x)
        distanceCounter += translation.x
        if distanceCounter > 0 {
            distanceCounter = 0
        }
        if checkButton.center.x > startingPointCheckBtn {
            checkButton.center.x = startingPointCheckBtn
        } else if checkButton.center.x < largeCircle.center.x && distanceCounter < checkBtnDistance{
            checkButton.center.x = largeCircle.center.x
            distanceCounter = checkBtnDistance
        } else {
            sender.setTranslation(CGPoint.zero, in: self.view)
        }
        // hide the buttons after we drag over them
        if distanceCounter < -60.0 && !rightCirclesHidden {
            for circle in rightCircles {
                circle.layer.removeAllAnimations()
                circle.backgroundColor = #colorLiteral(red: 1, green: 1, blue: 1, alpha: 0)
            }
            rightCirclesHidden = true
        } else if distanceCounter > -60.0 && rightCirclesHidden {
            for i in 0..<leftCircles.count {
                leftCircles[i].layer.removeAllAnimations()
                //rightCircles[i].backgroundColor = #colorLiteral(red: 1, green: 1, blue: 1, alpha: 0)
                rightCircles[i].backgroundColor = #colorLiteral(red: 1.0, green: 1.0, blue: 1.0, alpha: 1.0)
                leftCircles[i].backgroundColor = #colorLiteral(red: 1.0, green: 1.0, blue: 1.0, alpha: 1.0)
            }
            startAnimatingCircles()
            rightCirclesHidden = false
        }
    } else if sender.state == UIGestureRecognizerState.ended {
        if largeCircle.center.x - checkButton.center.x >= -35.0 {
            checkButton.center = largeCircle.center
            self.loadSignUpPage()
        } else {
            checkButton.center.x = startingPointCheckBtn
            self.view.layoutIfNeeded()
            print(startingPointCheckBtn)
            if rightCirclesHidden {
                for i in 0..<leftCircles.count {
                    leftCircles[i].layer.removeAllAnimations()
                    //rightCircles[i].backgroundColor = #colorLiteral(red: 1, green: 1, blue: 1, alpha: 0)
                    rightCircles[i].backgroundColor = #colorLiteral(red: 1.0, green: 1.0, blue: 1.0, alpha: 1.0)
                    leftCircles[i].backgroundColor = #colorLiteral(red: 1.0, green: 1.0, blue: 1.0, alpha: 1.0)
                }
                startAnimatingCircles()
                rightCirclesHidden = false
            }
        }
        distanceCounter = 0
    }
}

setUpCheckButton代码：

    func setUpCheckButton() {
    startingPointCheckBtn = checkButton.center.x
    print("check circle center: " + "\(startingPointCheckBtn)")
    checkBtnDistance = largeCircle.center.x - startingPointCheckBtn
    let checkGestureDrag = UIPanGestureRecognizer(target: self, action: #selector(AdViewPageVC.checkButtonWasDragged(_:)))
    checkButton.addGestureRecognizer(checkGestureDrag)
}

---

您不应该在

viewDidLoad

中设置它，而应该在

viewDidAppear

中设置它，以便在屏幕上显示复选标记时获得实际值。同时将您的手势结束块更改为此

UIView.animate(withDuration: 0.70, delay: 0, options: .curveEaseOut, animations: {
      self.checkButton.center.x = self.startingPointCheckBtn
      self.view.layoutIfNeeded()
}, completion: nil)

---

请显示视图的panGesture和te约束的代码。哇，这是很多检查。但是看看你需要什么。如果您将

checkButton

的起始位置存储在

startingPointCheckButton

中，它应该可以正常工作。检查起始位置是否确实存储在该变量中。另外，我建议您使用自动布局约束进行动画。还可以使用

UIView.animate

轻松地在复选标记中返回原始位置。请在

viewdide中显示代码。我想你可能用了框架而不是边界什么的。你能加入聊天吗？
UIView.animate(withDuration: 0.70, delay: 0, options: .curveEaseOut, animations: {
      self.checkButton.center.x = self.startingPointCheckBtn
      self.view.layoutIfNeeded()
}, completion: nil)