SwiftUI Data & ArchitectureLesson 57Free preview

AppStorage & SceneStorage

This lesson is part of Swift · All levels

Summary

This lesson reviews the state storage of the dedicated interface in SwiftUI using @AppStorage and @SceneStorage. @AppStorage synchronizes variables globally to UserDefaults, while @SceneStorage saves the local state specific to a single window/scene (very useful for state recovery when multitasking on iPadOS and macOS).

Key points

@AppStorage automatically reads and writes values to UserDefaults
@SceneStorage saves a standalone window state that is automatically restored when the app reopens
@SceneStorage is ideal for iPadOS Split View where there are two windows of the same app
Supports primitive types such as String, Int, Double, Bool, and URL data

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