Our iPadOS app is currently built with Xcode 26 / iOS 26 SDK.
The app still contains some legacy code that prevents the UI from being fully compliant with the latest system constraints (e.g. resizable scenes and updated design system behaviors).
We rely on:
- UIDesignRequiresCompatibility to preserve our existing UI while evaluating the new design system
- UIRequiresFullScreen to maintain a fixed layout not yet adapted to resizable scenes
We are actively modernizing the app and planning our migration to iOS 27, and would like clarification on upcoming requirements.
- Will UIDesignRequiresCompatibility continue to be supported with the iOS 27 SDK, or will the new UI system become mandatory?
- Will UIRequiresFullScreen be ignored or cause App Store rejections when using the iOS 27 SDK?
- Will support for multitasking and UIScene become required for submission?
- Will there be a grace period to continue shipping updates with the iOS 26 SDK?
- When is the expected enforcement timeline for iOS 27 SDK adoption?
- Are there any exemptions for apps with fixed-layout requirements?