将UIView覆盖TabBar和NavBar

Question

我正在尝试使用透明背景（另一个UIView）制作一个弹出窗口（UIView）。对于[popup UIView”，一切正常，但我不知道如何带来“透明背景UIView”（在NavigationBar和TabBar上方）。

首先，我在情节提要中创建了UIView并连接了插座：

popupView.center = CGPointMake(CGRectGetMidX(self.view.bounds), tableView.center.y);
self.view.addSubview(popupView)
popupView.clipsToBounds = true
popupView.alpha = 0

然后，在显示popupView时，我正在创建透明背景UIView：

 func clicked() {
    self.popupView.alpha = 1

    let screenSize: CGRect = UIScreen.mainScreen().bounds
    let opaqueView = UIView()
    opaqueView.frame.size = CGSize(width: screenSize.width, height: screenSize.height)
    opaqueView.backgroundColor = UIColor.blackColor()
    opaqueView.alpha = 0.5

    self.view.addSubview(opaqueView)
 }

但是，背景视图不会越过NavigationBar或TabBar。我试过了，但没有任何变化：

myTabBar.view.bringSubviewToFront(opaqueView)

[我想要实现的是，虽然在最前面有popup UIView，但在[Nav]和TabBar等所有内容上都具有opaque UIView，但在popup UIView之后

---

更新：

关于@Alex的答案，通过这一块，我实现了在TabBar和NavBar上显示opaqueView；但现在它也在popupView之上。

func display() {
   popupView.center = CGPointMake(CGRectGetMidX(self.view.bounds), tableView.center.y);
    self.view.addSubview(popupView)
    popupView.clipsToBounds = true

    let opaqueView = UIView()
    let screenSize: CGRect = UIScreen.mainScreen().bounds
    opaqueView.frame.size = CGSize(width: screenSize.width, height: screenSize.height)
    UIApplication.sharedApplication().keyWindow!.insertSubview(opaqueView, belowSubview: popupView) 
}

如何将opaqueView置于popupView之下，而opaqueView则位于其他一切之上？

Answer 1

尝试一下：

UIApplication.sharedApplication().keyWindow!.bringSubviewToFront(opaqueView)

为Swift 4.2更新

 UIApplication.shared.keyWindow!.bringSubview(toFront: opaqueView!)

Answer 2

（swift 3+），这将使您的视图在标签栏和导航栏的顶部

UIApplication.shared.keyWindow!.addSubview(yourView)
UIApplication.shared.keyWindow!.bringSubview(toFront: yourView)

Answer 3

    func addButtonTapped(){
              if self.transparentBackground == nil{
                  self.transparentBackground = UIView(frame: UIScreen.main.bounds)
                  self.transparentBackground.backgroundColor = UIColor(white: 0.0, alpha: 0.54)
                  UIApplication.shared.keyWindow!.addSubview(self.transparentBackground)
                  self.opaqueView = self.setupOpaqueView()
                  self.transparentBackground.addSubview(opaqueView)
                  UIApplication.shared.keyWindow!.bringSubview(toFront: self.transparentBackground)
                  self.view.bringSubview(toFront: transparentBackground)
              }
          }

          func setupOpaqueView() -> UIView{
                let mainView = UIView(frame: CGRect(x: 16, y: 100, width: Int(UIScreen.main.bounds.width-32), height: 200))
                mainView.backgroundColor = UIColor.white
                let titleLabel = UILabel(frame: CGRect(x: 16, y: 20, width: Int(mainView.frame.width-32), height: 100))
                titleLabel.text = "This is the opaque"
                titleLabel.textAlignment = .center
                titleLabel.font = font
                titleLabel.textColor = UIColor(white: 0.0, alpha: 0.54)
                mainView.addSubview(titleLabel)


                let  OKbutton = UIButton(frame: CGRect(x: 16, y: Int(mainView.frame.height-60), width: Int(mainView.frame.width-32), height: 45))
                OKbutton.backgroundColor = UIColor(red: 40.0 / 255.0, green: 187.0 / 255.0, blue: 187.0 / 255.0, alpha: 1)
                OKbutton.layer.cornerRadius = 10
                mainView.addSubview(OKbutton)
                OKbutton.setTitle("OK", for: .normal)
                OKbutton.setTitleColor(UIColor.white, for: .normal)
                OKbutton.titleLabel?.font = font
                OKbutton.addTarget(self, action:  #selector(FirstViewController.handleOKButtonTapped(_:)), for: .touchUpInside)

                return mainView

          }

          func handleOKButtonTapped(_ sender: UIButton){
              UIView.animate(withDuration: 0.3, animations: {
                  self.transparentBackground.alpha = 0
              }) { done in
                  self.transparentBackground.removeFromSuperview()
                  self.transparentBackground = nil

              }
          }

Answer 4

最佳解决方案是：

tabBarController?.view.addSubview(view)

Answer 5

UIApplication.shared.keyWindow！.bringSubviewToFront（view：view）在iOS 13之后被贬值。使透明视图同时覆盖Tab控制器和nav控制器的最佳方法是这样做。

if let tabBarController = self.tabBarController {
    tabBarController.view.addSubview(view)
}

Answer 6

要透明的视图，使用此

yourView.backgroundColor = UIColor.black.withAlphaComponent（0.7）