查iPhone iPad Orientation

查iPhone iPad Orientation,用 statusBarOrientation, 例如:

if ([UIApplication sharedApplication].statusBarOrientation == UIInterfaceOrientationLandscapeLeft || [UIApplication sharedApplication].statusBarOrientation == UIInterfaceOrientationLandscapeRight)

不要用[UIDevice currentDevice].orientation,如下,因為不準:

[UIDevice currentDevice].orientation == UIDeviceOrientationLandscapeLeft ||[UIDevice currentDevice].orientation == UIDeviceOrientationLandscapeRight