代码之家 › 专栏 › 技术社区 › Khushbu Desai

ios swift 4视图可见部分的触摸事件

touch events swift ios

Khushbu Desai · 技术社区 · 7 年前

我的工作是 照片拼贴 它在 Swift4 ,我用 UIBezierPath 如下所示

我有5个滚动视图 Storyboard 以及 Scrollviews 如下所示

使用我正在创建的以下代码形状 :

    var path1 = UIBezierPath()
    path1.move(to: CGPoint(x: 0, y: 0))
    path1.addLine(to: CGPoint(x: superView.frame.width / 2, y: 0))
    path1.addLine(to: CGPoint(x: 0, y: superView.frame.width / 2))
    path1.addLine(to: CGPoint(x: 0, y: 0))

    var borderPathRef1 = path1.cgPath

    var borderShapeLayer1 = CAShapeLayer()
    borderShapeLayer1.path = borderPathRef1

    scroll1.layer.mask = borderShapeLayer1
    scroll1.layer.masksToBounds = true


    var path2 = UIBezierPath()
    path2.move(to: CGPoint(x: 0, y: 0))
    path2.addLine(to: CGPoint(x: superView.frame.width / 2, y: 0))
    path2.addLine(to: CGPoint(x: superView.frame.width / 2, y: superView.frame.width / 2))
    path2.addLine(to: CGPoint(x: 0, y: 0))

    var borderPathRef2 = path2.cgPath

    var borderShapeLayer2 = CAShapeLayer()
    borderShapeLayer2.path = borderPathRef2

    scroll2.layer.mask = borderShapeLayer2
    scroll2.layer.masksToBounds = true

现在的问题是我无法得到 滚动视图 作为 Scroll5 在上面。我想接触重叠的视图,比如 Scroll1 , Scroll2 等等。总之我需要 在视图可见的区域部分上的特定视图的触摸事件。

请看下面的图片,我想触摸查看。

我怎样才能接触到 Overlapped Views ?

请帮忙!

1 回复 | 直到 6 年前

Versus 6 年前

必须确保将scrollview的superView设置为 isUserInterfaceEnabled=true 第一。

要获取重叠视图触摸事件:

这是我的代码:

class CustomView: UIView {
let view1: UIView
let view2: UIView
let view3: UIView
let view4: UIView
let view5: UIView

override init(frame: CGRect) {
    view1 = UIView(frame: CGRect(x: 0, y: 0, width: 100, height: 100))
    view1.backgroundColor = UIColor.black
    view1.isUserInteractionEnabled = true
    view2 = UIView(frame: CGRect(x: 100, y: 0, width: 100, height: 100))
    view2.backgroundColor = UIColor.orange
    view2.isUserInteractionEnabled = true
    view3 = UIView(frame: CGRect(x: 0, y: 100, width: 100, height: 100))
    view3.backgroundColor = UIColor.blue
    view3.isUserInteractionEnabled = true
    view4 = UIView(frame: CGRect(x: 100, y: 100, width: 100, height: 100))
    view4.backgroundColor = UIColor.brown
    view4.isUserInteractionEnabled = true
    view5 = UIView(frame: CGRect(x: 0, y: 0, width: 200, height: 200))
    view5.tag = 121
    view5.backgroundColor = UIColor.red
    super.init(frame: frame)
    self.addSubview(view1)
    self.addSubview(view2)
    self.addSubview(view3)
    self.addSubview(view4)
    self.addSubview(view5)
    view1.addGestureRecognizer(UITapGestureRecognizer(target: self, action: #selector(touchAction)))
}

@objc func touchAction () {
    print("----------- touch view 1")
}

required init?(coder aDecoder: NSCoder) {
    fatalError("init(coder:) has not been implemented")
}

override func hitTest(_ point: CGPoint, with event: UIEvent?) -> UIView? {
    if (view1.point(inside: self.convert(point, to: view1), with: event)) {
        return view1
    }
    return self
}

}

功能 碰撞试验 决定你正在触摸哪个视图,所以你只需要返回重叠视图。