Did anything in the app delegate change that I must be aware of
Asked on 2025-06-24
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Yes, there are changes related to the app delegate that you should be aware of. In iOS 26, adopting the UI Scene Lifecycle will become mandatory when building with the latest SDK. This means that the app delegate's role in determining the scene configuration for a connecting session is crucial. The UI Scene Lifecycle is required for all apps, not just those supporting multiple windows. This change is highlighted in the session Make your UIKit app more flexible.
Additionally, legacy UI application delegate callbacks and UIApplication launch option keys are being deprecated. Only the init window scene initializer for UIWindow remains, and every other initializer is deprecated. This is discussed in the session What’s new in UIKit.
These changes emphasize the importance of transitioning to the UI Scene Lifecycle to ensure your app remains compatible with future iOS releases.
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