iOS 全屏播放网页视频退出后状态栏被隐藏

使用wkWebView播放网页上的视频，播放完成后，退出视频返回到网页发现app的状态整个被隐藏了，解决方法，监听状态栏隐藏通知，在适当的时候让状态栏显示出来

    [[NSNotificationCenter defaultCenter]addObserver:self selector:@selector(windowDidBecomeHidden:) name:UIWindowDidBecomeHiddenNotification object:nil];

-(void)windowDidBecomeHidden:(NSNotification *)noti{

    UIWindow * win = (UIWindow *)noti.object;

    if(win){

        UIViewController *rootVC = win.rootViewController;

        NSArray<__kindof UIViewController *> *vcs = rootVC.childViewControllers;

        if([vcs.firstObject isKindOfClass:NSClassFromString(@"AVPlayerViewController")]){

            [[UIApplication sharedApplication] setStatusBarHidden:NO withAnimation:UIStatusBarAnimationNone];
        }
    }
}