关闭第二个 UIWindow 后恢复状态栏状态

Question

有主 UIWindow 持有 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。

当我显示带有 PopupViewController 的第二个 UIWindow 时，状态栏样式更改为 default，但当我隐藏它时，样式不会变回 lightContent。

同样的问题适用于我 VC 在弹出窗口 window 中隐藏状态栏的情况 - 当弹出窗口 window 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：弹出窗口随时可能出现，我不知道那个VC当时处于活动状态

Answer 1

更改 ViewWillAppear 上的状态栏样式

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

Answer 2

请在您第一个更改状态栏颜色 Light 的控制器上添加以下代码。

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

通过上面的代码你一定会得到正确的解决方案

Answer 3

针对您的情况的简单解决方案

显示Window

针对您的情况的简单解决方案

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

新用户界面Window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()
    }
)

Answer 4

我要找的东西是 UIViewController.setNeedsStatusBarAppearanceUpdate()。这是告诉 VC 状态栏外观已更改且需要恢复的便捷方法。

// 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！

关闭第二个 UIWindow 后恢复状态栏状态

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