How do I detect a rotation on the iPhone without the device autorotating?

You can register for the notification UIDeviceOrientationDidChangeNotification (from UIDevice. H), and then when you care about orientation changes call this method: UIDevice currentDevice beginGeneratingDeviceOrientationNotifications When you no longer care about orientation changes, call this method: UIDevice currentDevice endGeneratingDeviceOrientationNotifications The notification will be sent when applicable, and you can check UIDevice currentDevice. Orientation to find out what the current orientation is.

You can register for the notification UIDeviceOrientationDidChangeNotification (from UIDevice. H), and then when you care about orientation changes call this method: UIDevice currentDevice beginGeneratingDeviceOrientationNotifications; When you no longer care about orientation changes, call this method: UIDevice currentDevice endGeneratingDeviceOrientationNotifications; The notification will be sent when applicable, and you can check UIDevice currentDevice. Orientation to find out what the current orientation is.

Thanks - this is exactly what I was after! – Nick Cartwright Jun 15 '09 at 16:54 Bad side effect is that the device will not go to sleep anymore. – drvdijk Aug 6 '09 at 14:59.

On a side note shouldAutoRotateToInterfaceOrientation used to be called on the time for rotation in 2. X, but in 3.0 it's much less consistent. The notification mentioned in the other post is the way to go for reliable indication of rotation.

Thanks Kendall for the tip! N – Nick Cartwright Jun 16 '09 at 9:39.

You're returning YES from shouldAutorotateToInterfaceOrientation:, which I suspect you didn't mean to do. That's the only method you need to implement to prevent the device from rotating. As for getting the current orientation of the device, you can use UIDevice currentDevice orientation.

There - thanks for your suggestion! UIDevice currentDevice orientation will get the current orientation - but I need to detect when this happens without the phone auto-rotating. If I return NO from shouldAutorotateToInterfaceOrientation, none of the delegate functions get called so I loose the ability to detect when rotation happens.

Does anyone else have any ideas? Cheers, Nick. – Nick Cartwright Jun 15 '09 at 15:54.

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