iOS 7 - 隐藏子视图控制器上的状态栏 [英] iOS 7 - Hide status bar on a child view controller

问题描述

UIApplication.SharedApplication.SetStatusBarHidden （MonoTouch代码，但也适用于Obj-C）为iOS 6做了工作，但对于iOS 7，我们必须：

UIApplication.SharedApplication.SetStatusBarHidden(MonoTouch code, but also applies to Obj-C) does the job for iOS 6, but for iOS 7 we must:

1. 在视图控制器上调用 SetNeedsStatusBarAppearanceUpdate（）（例如：显示a的视图控制器）全屏图片）


2. 在同一视图控制器上覆盖 PrefersStatusBarHidden（）。

1. Invoke SetNeedsStatusBarAppearanceUpdate () on the view controller (e.g.: a view controller that is showing a fullscreen image)
2. Override PrefersStatusBarHidden () on the same view controller.

然而，上面提到的视图控制器嵌入在导航栏中，导航栏也嵌入在滑出菜单中。即使使用 AddChildViewController（）将所有嵌入式视图控制器添加到层次结构中，尝试更新子视图控制器中的状态栏也无效。

However the view controller mentioned above is embedded in a navigation bar, which is also embedded in a slideout menu. Even though all embedded view controllers are added to the hierarchy using AddChildViewController(), attempting to update the status bar in a child view controller has no effect.

任何想法？

编辑

Window.RootViewController (Menu)
|___ ViewControllerA (Navigation Bar)
     |___ ViewControllerB (Actual View controller)

其中 ViewControllerB 想要隐藏/显示状态bar

Where ViewControllerB wants to hide/show the status bar

推荐答案

ViewControllerA应覆盖childViewControllerForStatusBarHidden并返回ViewControllerB。

ViewControllerA should override childViewControllerForStatusBarHidden and return ViewControllerB.

- (UIViewController *)childViewControllerForStatusBarHidden {
    return _viewControllerB;
}

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