# childForInterfaceOrientationLock A child view controller to query for the interface orientation lock preference. ``` var childForInterfaceOrientationLock: UIViewController? { get } ``` ## Discussion Override to return a child view controller or `nil`. If you return a view controller, the system uses that view controller’s preference for interface orientation lock. If you return `nil`, the system uses `self` to get the preference for interface orientation lock. Call [`setNeedsUpdateOfPrefersInterfaceOrientationLocked()`](/documentation/UIKit/UIViewController/setNeedsUpdateOfPrefersInterfaceOrientationLocked()) if the child view controller that the system needs to query for the interface orientation lock preference changes. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)