ARK-OS/arkos/arkrt/ark.ui.basic/Sources/SwiftCrossUI.docc/State basics.md

State basics

Overview

These concepts form the foundation of SwiftCrossUI's reactivity.

Use the State property wrapper to store state within your apps, scenes, and views. State generally trickles down through your view hierarchies. Variables without the State annotation aren't reactive.

If you want to persist a small amount of data to disk, use AppStorage.

For situations where you need data to trickle back up again, use Binding (think mutable references to state).

Topics

• State
• Binding
• ObservableObject
• ObservableObject()
• ObservationIgnored()
• Published
• Publisher
• Cancellable

App Storage

• AppStorage
• AppStorageKey
• AppStorageValues
• AppStorageProvider
• DefaultAppStorageProvider
• UserDefaultsAppStorageProvider
• View/appStorageProvider(_:)