# LocalAuthenticationView A SwiftUI view that displays an authentication interface. ``` @MainActor @preconcurrency struct LocalAuthenticationView where Label : View ``` ## Overview Use a [`LocalAuthenticationView`](/documentation/LocalAuthentication/LocalAuthenticationView) to display a view that prompts users to authenticate with the app. The view visually represents the state of an [`LAPolicy`](/documentation/LocalAuthentication/LAPolicy) evaluation from the [`Local Authentication`](/documentation/LocalAuthentication) framework. The following shows a [`LocalAuthenticationView`](/documentation/LocalAuthentication/LocalAuthenticationView) in a Mac app with an implicit [`LAContext`](/documentation/LocalAuthentication/LAContext) instance: ```swift var body: some View { LocalAuthenticationView( "Continue with Touch ID", reason: Text("Access sandcastle competition designs") ) { result in switch result { case .success: print("Authorized") case .failure(let error): print("Authorization failed: \(error)") } } .controlSize(.large) } ``` If your app’s authorization flow reuses an existing [`LAContext`](/documentation/LocalAuthentication/LAContext), pass it as part of initializing a [`LocalAuthenticationView`](/documentation/LocalAuthentication/LocalAuthenticationView) and call its [`evaluatePolicy(_:localizedReason:reply:)`](/documentation/LocalAuthentication/LAContext/evaluatePolicy(_:localizedReason:reply:)) method after the view appears. ## Topics ### Authenticating with an implicit context [`init(reason:context:result:label:)`](/documentation/LocalAuthentication/LocalAuthenticationView/init(reason:context:result:label:)) Creates a local authentication view. [`init(_:reason:context:result:)`](/documentation/LocalAuthentication/LocalAuthenticationView/init(_:reason:context:result:)-8ubaq) Creates a local authentication view with a title. [`init(_:reason:context:result:)`](/documentation/LocalAuthentication/LocalAuthenticationView/init(_:reason:context:result:)-917ds) Creates a local authentication view with a localizable title. [`init(_:reason:context:result:)`](/documentation/LocalAuthentication/LocalAuthenticationView/init(_:reason:context:result:)-4pkpi) Creates a local authentication view with a title text view. ### Authenticating with a context you supply [`init(_:context:)`](/documentation/LocalAuthentication/LocalAuthenticationView/init(_:context:)-9xeoo) Creates a local authentication view with a required context. [`init(context:label:)`](/documentation/LocalAuthentication/LocalAuthenticationView/init(context:label:)) Creates a local authentication view with a label and required context. [`init(_:context:)`](/documentation/LocalAuthentication/LocalAuthenticationView/init(_:context:)-676qx) Creates a local authentication view with a localizable title and required context. ### Instance Methods --- 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)