关闭第二个 UIWindow 后恢复状态栏状态

Question

主要的UIWindow 包含MainViewController，它使用lightContent 作为preferredStatusBarStyle。我创建了第二个UIWindow 实例来显示PopupViewController，它使用default 作为preferredStatusBarStyle。

当我用PopupViewController 显示第二个UIWindow 时，状态栏样式更改为default，但是当我隐藏它时，样式不会变回lightContent。

同样的问题适用于我在弹出窗口中有隐藏状态栏的 VC 的情况 - 当弹出窗口被解除时状态栏不显示。

新UIWindow创建：

// Prepare window to show dialog box in
newWindow = UIWindow(frame: UIScreen.main.bounds)
newWindow?.windowLevel = 3

// Overlay new window
newWindow?.makeKeyAndVisible()
self.mainWindow.windowLevel = 1
self.mainWindow.endEditing(true)
newWindow?.isHidden = false

// Display dialog
newWindow?.rootViewController = PopupViewController()

新的UIWindow 解雇：

UIView.animate(
    withDuration: 1.0,
    delay: 0,
    usingSpringWithDamping: 1,
    initialSpringVelocity: 0,
    options: .curveEaseOut,
    animations: { [weak self] in
        self?.newWindow?.alpha = 0
    },
    completion: { [weak self] _ in
        self?.newWindow?.windowLevel = 0
        self?.newWindow?.rootViewController = nil
        self?.newWindow?.alpha = 1
        self?.mainWindow.makeKeyAndVisible()
    }
)

谢谢！

编辑：弹窗随时可能出现，我不知道当时哪个VC活跃

Answer 1

更改 ViewWillAppear 上的状态栏样式

override func viewWillAppear(_ animated: Bool) {
    UIApplication.shared.statusBarStyle = .lightContent
}

Answer 2

1. 请在您更改状态栏颜色 Light 的第一个控制器上添加以下代码。

   覆盖 func viewDidAppear(_ animated: Bool) { UIApplication.shared.setStatusBarStyle(UIStatusBarStyle.lightContent, animated: false) }

2. 现在在您想要默认状态栏样式的第二个控制器中，输入代码：

   覆盖 func viewDidAppear(_ animated: Bool) { UIApplication.shared.setStatusBarStyle(UIStatusBarStyle.default, animated: false) }

通过上面的代码，你一定会得到正确的解决方案

Answer 3

为您的案例提供简单的解决方案

1. 显示窗口

为您的案例提供简单的解决方案

1. 新的 UIWindow 创建：

   // Prepare window to show dialog box in
   newWindow = UIWindow(frame: UIScreen.main.bounds)
   newWindow?.windowLevel = 3
   
   // Overlay new window
   newWindow?.makeKeyAndVisible()
   self.mainWindow.windowLevel = 1
   self.mainWindow.endEditing(true)
   newWindow?.isHidden = false
   
   // Display dialog
   newWindow?.rootViewController = PopupViewController()
   // Now you can change status bar style default or other style
   UIApplication.shared.statusBarStyle = .default
   

2. 新的 UIWindow 关闭：

   UIView.animate(
       withDuration: 1.0,
       delay: 0,
       usingSpringWithDamping: 1,
       initialSpringVelocity: 0,
       options: .curveEaseOut,
       animations: { [weak self] in
           self?.newWindow?.alpha = 0
           // Revert back to default
           UIApplication.shared.statusBarStyle = .lightContent
       },
       completion: { [weak self] _ in
           self?.newWindow?.windowLevel = 0
           self?.newWindow?.rootViewController = nil
           self?.newWindow?.alpha = 1
           self?.mainWindow.makeKeyAndVisible()
       }
   )
   

Answer 4

我要找的是UIViewController.setNeedsStatusBarAppearanceUpdate()。告诉 VC 状态栏外观已更改，需要恢复是一种方便的方法。

// make main window key but transparent
self.mainWindow.alpha = 0
self.newWindow?.windowLevel = 0
self.newWindow?.alpha = 1
self.mainWindow.makeKey()

// restore status bar appearance  
self.mainWindow.rootViewController!.setNeedsStatusBarAppearanceUpdate()

// Fade in main window with (status bar is in proper state at this moment)
UIView.animate(
        withDuration: 0.9,
        delay: 0,
        usingSpringWithDamping: 1,
        initialSpringVelocity: 0,
        options: .curveEaseIn,
        animations: { [weak self] in
            self?.mainWindow.alpha = 1
        },
        completion: { [weak self] _ in
            // destroy popup VC
            self?.newWindow?.rootViewController = nil
        }
)

Here is useful article on this subject

谢谢大家！