26.7 Summary

The @SceneStorage and @AppStorage property wrappers provide two ways to persistently store small amounts of data within a SwiftUI app. Scene storage is intended primarily for saving and restoring the state of a scene when an app is terminated while in the background. Each scene within an app has its own local scene storage which is not directly accessible to other areas of the app. App storage uses the UserDefaults system and is used for storing data that is to be accessible from anywhere within an app. Through the use of App Groups, app storage may also be shared between different targets within the same app project, or even entirely different apps. Changes to app storage are immediate regardless of whether the app is currently in the foreground or background.

Both the @AppStorage and @SceneStorage property wrappers support storing Bool, Int, Double, String, URL and Data types. Other types need to be encoded and encapsulated in Data objects before being placed into...