class GreenView: UIView{
    override func hitTest(_ point: CGPoint, with event: UIEvent?) -> UIView? {
        var afterThat = next
        while afterThat != nil{
            if let tmp = afterThat as? ViewController{
                if let target = tmp.pagedController.viewControllers?.first{
                    return target.view
                }
            }
            else{
                afterThat = afterThat?.next
            }
        }
        return nil
    }
}

同時要捕捉綠色視圖的點擊事件，

通過閱讀頁面的視圖控制器，來捕捉

class ContentCtrl: UIViewController {
    override func touchesEnded(_ touches: Set<UITouch>, with event: UIEvent?) {
        if let touch = touches.first, greenFrame.contains(touch.location(in: view)){
            NotificationCenter.default.post(name: .hitGreen, object: nil)
        }
    }
}

場景二

用戶在直播室，吃瓜

來了一條重要的消息，必須要用戶處理，

用戶退出直播室，也要展示，

同時不影響用戶給主播送禮物

如上圖，用戶看到消息，也可以滑動閱讀器

（在消息的區(qū)域，滑動無效）

思路肯定是 window,

脫離控制器，也能展示

實現(xiàn)一，創(chuàng)建新的 window

class MsgWindow: UIWindow {
    init() {
        let originX: CGFloat = 50
        let width = UIScreen.main.bounds.width - originX * 2
        // 窗口大小固定
        super.init(frame: CGRect(x: originX, y: 100, width: width, height: 150))
        clipsToBounds = true
        layer.cornerRadius = 8
        backgroundColor = UIColor.cyan
        // 提升 zIndex
        windowLevel = UIWindow.Level.statusBar + 100
        isHidden = true
    }
    func show(){
         // 展現(xiàn)的必要配置
        if windowScene == nil, let scene = UIApplication.shared.connectedScenes.first as? UIWindowScene{
            windowScene = scene
        }
        isHidden = false
    }
}

實現(xiàn) 2，使用老的 window 和 View

class MsgView: UIView {
    init() {
        let originX: CGFloat = 50
        let width = UIScreen.main.bounds.width - originX * 2
        super.init(frame: CGRect(x: originX, y: 100, width: width, height: 150))
        clipsToBounds = true
        layer.cornerRadius = 8
        backgroundColor = UIColor.cyan
        // 設(shè)置 z Index
        layer.zPosition = CGFloat.infinity
        isHidden = true
    }
    func show(){
        // 找到 key window, 
        // 把視圖，添加上去
        let scenes = UIApplication.shared.connectedScenes
        for sce in scenes{
            if let windowScene = sce as? UIWindowScene, windowScene.activationState == .foregroundActive , let win = windowScene.windows.first{
                isHidden = false
                win.addSubview(self)
                return
            }
        }
    }
}

場景三

用戶在直播室，吃瓜

來了一條重要的消息，必須要用戶處理，

用戶退出直播室，也要展示，

同時不影響用戶給主播送禮物

這條消息，很長

（在消息的區(qū)域，滑動有效）

思路，擴展場景 2 的第 2 種實現(xiàn)

一句話，限定了響應范圍，

重寫了 func point(inside

class MsgView: UIView {
    let rect : CGRect = {
        let originX: CGFloat = 50
        let width = UIScreen.main.bounds.width - originX * 2
        return CGRect(x: originX, y: 100, width: width, height: 400)
    }()
    let btnRect = CGRect(x: 10, y: 10, width: 50, height: 50)
    init() {
        super.init(frame: rect)
        clipsToBounds = true
        layer.cornerRadius = 8
        backgroundColor = UIColor.clear
        layer.zPosition = CGFloat.infinity
        isHidden = true
        let bg = UIView(frame: CGRect(origin: .zero, size: rect.size))
        bg.backgroundColor = UIColor.cyan
        bg.alpha = 0.5
        addSubview(bg)
        let btn = UIButton(frame: btnRect)
        btn.backgroundColor = UIColor.red
        btn.layer.cornerRadius = 8
        btn.backgroundColor = UIColor.white
        addSubview(btn)
        btn.addTarget(self, action: #selector(hide), for: .touchUpInside)
    }
    @objc func hide(){
        isHidden = true
    }
    override func point(inside point: CGPoint, with event: UIEvent?) -> Bool {
        return btnRect.contains(point)
    }
}

為啥這條消息，不用 scroll View ?

ha ha

同時，解決了場景一

一般情況下

github repo

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