关于ios:iOS-监听横屏竖屏-隐藏状态栏

BOOL _isFullScreen;[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(rotated:) name:UIDeviceOrientationDidChangeNotification object:nil];- (void)rotated:(NSNotification *)notification{    UIDevice *dv = notification.object;    /*          UIInterfaceOrientationLandscapeLeft = UIDeviceOrientationLandscapeRight     */    if (dv.orientation == UIDeviceOrientationLandscapeLeft ||        dv.orientation == UIDeviceOrientationLandscapeRight)    {        NSLog(@"横屏");        _isFullScreen = true;      }else if (dv.orientation == UIDeviceOrientationFaceUp ||         dv.orientation == UIDeviceOrientationFaceDown)     {         NSLog(@"face");     }else{         NSLog(@"竖屏");         _isFullScreen = NO;    }    [self reloadStatuestBar];}- (BOOL)prefersStatusBarHidden{    return _isFullScreen;}- (void)reloadStatuestBar {    if ( [self  respondsToSelector:@selector(setNeedsStatusBarAppearanceUpdate)] ) {        // go prefersStatusBarHidden         [self setNeedsStatusBarAppearanceUpdate];    } else {        [[UIApplication sharedApplication] setStatusBarHidden:_isFullScreen];    }}