smf_apple_sign_in 0.6.0

The SMF module of Sign in with Apple for the Flutter app that SMF generates. The users of the app sign in with their Apple Account on iOS, next to the other ways to sign in of the app.

example/README.md

Generate a Flutter app that signs in with Apple

apple_sign_in is the module of the SMF CLI with which the users of the app sign in with their Apple Account on iOS. Choose it with -m, next to a provider of sign-in:

dart pub global activate smf_flutter_cli
smf create my_app -m firebase_auth,apple_sign_in,sign_in,bloc

The module adds sign_in_with_apple and crypto to the pubspec.yaml of the app, and lib/core/apple_sign_in/apple_sign_in.dart with appleCredential(), which asks Apple for a credential, and AppleSignInIcon, the icon of its button. The auth role lists the way to sign in in appSignInMethods of lib/core/auth/sign_in_methods.dart:

const List<SignInMethod> appSignInMethods = [
  SignInMethod(
    label: _appleSignInLabel,
    icon: method0.AppleSignInIcon(),
    platforms: {TargetPlatform.iOS},
    credential: method0.appleCredential,
    issuer: 'https://appleid.apple.com',
    revokesOnDeletion: true,
  ),
];

A screen of sign-in shows a button for each way to sign in that isAvailable on the platform of the app, here on iOS only. On a tap, its state asks for a credential and gives it to the session of the app:

final credential = await method.credential();
if (credential == null) return; // The user closed the sheet of Apple.
await appSession.signInWith(credential);

An anonymous user who signs in with Apple keeps the id. Deleting an account that signs in with Apple asks Apple again, so that the provider of sign-in can revoke the tokens of Apple.

The module signs the iOS app with the entitlement com.apple.developer.applesignin in ios/Runner/Runner.entitlements. Signing with it needs a team of the paid Apple Developer Program, and the README of the app tells how to run the app on an iPhone with a free team.

The documentation has more on the apple_sign_in module.