关闭第二个 UIWindow 后恢复状态栏状态

Question

有一个主要的UIWindow保存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。

当我显示第二个UIWindow时PopupViewController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具有隐藏状态栏的VC的情况 - 弹出窗口关闭时状态栏不显示。

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：弹出窗口可以随时出现，我不知道当时哪个VC处于活动状态

Answer 1

我一直在寻找的东西是UIViewController.setNeedsStatusBarAppearanceUpdate().告诉 VC 状态栏外观已更改并且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
}
)

这是关于这个主题的有用文章

谢谢大家！

Answer 2

更改 ViewWillAppear 上的状态栏样式

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

Answer 3

1. 请在更改状态栏颜色 Light 的第一个控制器上添加以下代码。

   override 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：

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

您一定会通过上面的代码获得正确的解决方案

Answer 4

适合您情况的简单解决方案

1. 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()
   // Now you can change status bar style default or other style
   UIApplication.shared.statusBarStyle = .default
   

2. 新 UIWindow 解雇：

   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()
   }
   )