Question

view.bringSubviewToFront(tappedView)

当我拖动（平移）视图时，

起作用，但是当我点击它们时却不起作用。我的问题是，当我在一个视图上叠加另一个视图时，我希望在点击时底部视图位于前面。目前，只有在拖动时它才会位于最前面。我是否需要一些其他代码来做到这一点？谢谢。

这是我的代码的摘录，内容更多：

@objc func didPan(_ recognizer: UIPanGestureRecognizer) {
        let location = recognizer.location(in: self.view)
            switch recognizer.state {
            case .began:
                currentTappedView = moviePieceView.filter { pieceView -> Bool in
                    let convertedLocation = view.convert(location, to: pieceView)
                    return pieceView.point(inside: convertedLocation, with: nil)
                    }.first
                currentTargetView = movieTargetView.filter { $0.pieceView == currentTappedView }.first
            case .changed:
                guard let tappedView = currentTappedView else { return }
                let translation = recognizer.translation(in: self.view)
                tappedView.center = CGPoint(x: tappedView.center.x + translation.x, y: tappedView.center.y + translation.y)
                recognizer.setTranslation(.zero, in: view)
                view.bringSubviewToFront(tappedView)
    ```

Answer 1

我遇到了同样的问题，我设法通过以下方式解决了这个问题：

在视图中添加一个手势识别器，并将其放入代码中。 在将其附加到代码时不要忘记设置委托！

@IBAction func tappedView1(recognizer: UITapGestureRecognizer) {
        view.bringSubviewToFront(myView)
    }

将其放入您的viewDidLoad：

  let tap = UITapGestureRecognizer(target: self, action: #selector(tappedView1))
        tap.cancelsTouchesInView = false
        self.view.addGestureRecognizer(tap)

如果要通过panGesture进行操作，请检查我的question。

Answer 2

谢谢大家。当我编写了didPan（）之外的第二个函数时，它起作用了。

这是附加代码：

    override func viewDidLoad() {
        super.viewDidLoad()
        configureLabel()

        let panGestureRecognizer = UIPanGestureRecognizer(target: self, action: #selector(didPan(_:)))
        view.addGestureRecognizer(panGestureRecognizer)

        let tapGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(didTap(_:)))
            view.addGestureRecognizer(tapGestureRecognizer)
    }

    @objc func didTap(_ recognizer: UITapGestureRecognizer) {
        let location = recognizer.location(in: self.view)
        currentTappedView = moviePieceView.filter { pieceView -> Bool in
            let convertedLocation = view.convert(location, to: pieceView)
            return pieceView.point(inside: convertedLocation, with: nil)
            }.first
        guard let tappedView = currentTappedView else { return }
        view.bringSubviewToFront(tappedView)
    }

但是，我发现，如果您不想通过编程方式进行操作，也可以在“图像视图”中勾选“已启用用户交互”框。

为什么BringSubviewToFront（）仅适用于平移，而不是轻按？

2 个答案: