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# UIInterfaceOrientation

The initial orientation of the app’s user interface.

## Discussion

The default value is `UIInterfaceOrientationPortrait`. If you add the [`UISupportedInterfaceOrientations`](/documentation/BundleResources/Information-Property-List/UISupportedInterfaceOrientations) key to the information property list, the system ignores this key.

For more information, see <doc://com.apple.documentation/documentation/UIKit/UIInterfaceOrientation>.

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