# init(_:store:) Creates a property that can save and restore an Optional string, transforming it to an Optional `RawRepresentable` data type. ``` init(_ key: String, store: UserDefaults? = nil) where Value == R?, R : RawRepresentable, R.RawValue == String ``` ## Parameters `key` The key to read and write the value to in the user defaults store. `store` The user defaults store to read and write to. A value of `nil` will use the user default store from the environment. ## Discussion Defaults to nil if there is no restored value A common usage is with enumerations: ``` enum MyEnum: String { case a case b case c } struct MyView: View { @AppStorage("MyEnumValue") private var value: MyEnum? var body: some View { ... } } ``` --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)