Get device current orientation (App Extension)

Question

How to get device current orientation in an App Extension, I have tried below two methods but no success.

1. It always return UIDeviceOrientationUnknown

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Answer 1

I know it's late, but the mistake in this question was in this line:

[[NSNotificationCenter defaultCenter] addObserver:self.view selector:@selector(notification_OrientationWillChange:) name:UIApplicationWillChangeStatusBarOrientationNotification object:nil];

addObserver:self.view is wrong, the notification should be attached on self for being called. Work also on iOS8.