ios - prefersStatusBarHidden 未调用

Question

我有一个 UITabViewController -> UINavigationController -> UIViewController 并且想要隐藏和取消隐藏 statusBar。当我调用 setNeedsStatusBarAppearanceUpdate() 时，方法 prefersStatusBarHidden 没有被调用。

func fadeOutStatusBar (notification: NSNotification) {
    statusBarHidden = true
    self.setNeedsStatusBarAppearanceUpdate()
}

func fadeInStatusBar (notification: NSNotification) {
    statusBarHidden = false
    self.setNeedsStatusBarAppearanceUpdate()
}

override func prefersStatusBarHidden() -> Bool {
    return statusBarHidden
}

Answer 1

首先，.plist 文件中的View controller-based status bar appearance 必须设置为YES。

• 如果您希望在整个应用程序中隐藏状态栏:

对于 Objective-C:

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    [application setStatusBarHidden:YES];

    return YES;
}

对于 Swift:

func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject:AnyObject]?) -> Bool {
    application.statusBarHidden = true

    return true
}

• 如果你想让状态栏在Specify View Controller中消失，在.m文件中，只需执行:

对于 Objective-C:

- (BOOL)prefersStatusBarHidden {
    return YES;
}

对于 Swift:

override func prefersStatusBarHidden() -> Bool {
    return true
}