支持横屏的设备才收到监听，并准确判断当前屏幕方向

//  监听屏幕旋转通知（因为监听的是状态栏的方向变化，所以只有支持横屏的设备才会收到通知）
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(doRotateAction:) name:UIApplicationDidChangeStatusBarOrientationNotification object:nil];


#pragma mark - 屏幕旋转监听后方法
- (void)doRotateAction:(NSNotification *)notification
{
    // 此时根据当前的设备方向来判断是横屏还是竖屏更加准确
    if ([[UIDevice currentDevice] orientation] == UIDeviceOrientationPortrait || [[UIDevice currentDevice] orientation] == UIDeviceOrientationPortraitUpsideDown)
    {   // 竖屏
        
    }
    else if ([[UIDevice currentDevice] orientation] == UIDeviceOrientationLandscapeLeft || [[UIDevice currentDevice] orientation] == UIDeviceOrientationLandscapeRight)
    {   // 横屏
        
    }
}