本文介绍了prefersStatusBarHidden未调用的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我有一个 UITabViewController - > UINavigationController - > UIViewController 并希望隐藏和取消隐藏statusBar。当我调用 setNeedsStatusBarAppearanceUpdate（）时，不调用方法 prefersStatusBarHidden 。
I have a UITabViewController -> UINavigationController -> UIViewController and want to hide and unhide the statusBar. when I call setNeedsStatusBarAppearanceUpdate() the method prefersStatusBarHidden is not called.
func fadeOutStatusBar (notification: NSNotification) {
statusBarHidden = true
self.setNeedsStatusBarAppearanceUpdate()
}
func fadeInStatusBar (notification: NSNotification) {
statusBarHidden = false
self.setNeedsStatusBarAppearanceUpdate()
}
override func prefersStatusBarHidden() -> Bool {
return statusBarHidden
}
推荐答案
想出来。在info.plist文件中：
视图控制器状态栏外观应设置为YES
Figured it out. in info.plist file: view controller-status bar appearance should be set to YES
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