Have you ever tried to implement Apple Sign In with Flutter Firebase on iOS, only to find that the user’s email and name are nowhere to be found? You’re not alone! This frustrating issue has been plaguing developers for a while, but fear not, dear reader, for we’ve got the solution right here.
The Problem: No Email/Name on iOS
When you implement Apple Sign In with Flutter Firebase on iOS, you might notice that the user’s email and name are not being returned in the authentication result. This is because Apple’s Sign In API doesn’t provide this information by default. But don’t worry, we can still get it with a little creativity and some extra steps.
Why Does Apple Hide the Email/Name?
Apple is very particular about user privacy, and rightly so. By not providing the email and name by default, they’re protecting users from potential misuse of their personal information. However, as developers, we need this information to create a seamless user experience. So, let’s dive into the solution.
The Solution: Ask for Permissions
To get the user’s email and name, we need to ask for permission explicitly. We’ll do this by adding a few lines of code to our `signInWithApple` function.
import 'package:firebase_auth/firebase_auth.dart';
import 'package:flutter/material.dart';
Future signInWithApple() async {
try {
final AppleAuthProvider appleAuthProvider = AppleAuthProvider();
final authResult = await appleAuthProvider.signIn();
final oAuthToken = authResult.credential.accessToken;
// Ask for email and name permissions
final authService = oAuthToken.getAuthenticationService();
final perm Resp = await authService.request(
url: 'https://appleid.apple.com/auth/authorize',
method: 'POST',
headers: {
'Content-Type': 'application/x-www-form-urlencoded',
},
body: 'client_id=com.example.flutter_app&redirect_uri=http://localhost:8080&response_type=code&scope=name+email&response_mode=form_post',
);
// Get the authorization code
final code = permResp.body['code'];
// Exchange the code for an access token
final tokenResp = await authService.request(
url: 'https://appleid.apple.com/auth/token',
method: 'POST',
headers: {
'Content-Type': 'application/x-www-form-urlencoded',
},
body: 'grant_type=authorization_code&code=$code&redirect_uri=http://localhost:8080&client_id=com.example.flutter_app&client_secret=your_client_secret',
);
// Get the access token
final accessToken = tokenResp.body['access_token'];
// Use the access token to get the user's email and name
final userInfoResp = await authService.request(
url: 'https://appleid.apple.com/auth/userinfo',
method: 'GET',
headers: {
'Authorization': 'Bearer $accessToken',
},
);
// Extract the email and name
final email = userInfoResp.body['email'];
final name = userInfoResp.body['name'];
// Create a Firebase user with the email and name
final userCredential = await FirebaseAuth.instance.createUserWithEmailAndPassword(
email: email,
password: '123456', // Temporary password, you can generate a strong one
);
// Update the user's display name
await userCredential.user.updateDisplayName(name);
// You can now use the user's email and name
print('User email: $email');
print('User name: $name');
} catch (e) {
print('Error: $e');
}
}
What’s happening in this code?
- We’re using the `AppleAuthProvider` to sign in with Apple.
- We’re asking for permission to access the user’s email and name using the `request` method.
- We’re exchanging the authorization code for an access token using the `request` method again.
- We’re using the access token to get the user’s email and name from the userinfo endpoint.
- We’re creating a Firebase user with the email and name, and updating the display name.
Troubleshooting Tips
Here are some common issues you might run into and how to solve them:
Error | Solution |
---|---|
Invalid client ID | Make sure you’ve replaced `com.example.flutter_app` with your actual client ID. |
Invalid client secret | Make sure you’ve replaced `your_client_secret` with your actual client secret. |
Error 400: Bad Request | Check that your request body is correctly formatted and that you’re sending the correct headers. |
Error 401: Unauthorized | Make sure you’re using the correct access token and that it hasn’t expired. |
Best Practices
Here are some best practices to keep in mind when implementing Apple Sign In with Flutter Firebase:
- Always handle errors and exceptions properly to provide a seamless user experience.
- Store the user’s email and name securely in your Firebase Realtime Database or Firestore.
- Use the user’s email and name to personalize their experience and provide a more engaging app.
- Make sure to comply with Apple’s guidelines and terms of service when implementing Sign In with Apple.
Conclusion
Implementing Apple Sign In with Flutter Firebase on iOS can be a bit tricky, but with the right approach, you can get the user’s email and name easily. By asking for permissions and using the correct API endpoints, you can provide a seamless user experience and access the user’s information securely. Remember to troubleshoot any issues that arise and follow best practices to ensure a smooth and engaging app.
Happy coding, and don’t forget to share your experiences and tips in the comments below!
Here are the 5 Questions and Answers about “Flutter Firebase Apple Sign In missing Email/Name on iOS”:
Frequently Asked Question
Get answers to the most common queries about Flutter Firebase Apple Sign In on iOS.
Why is Firebase Apple Sign In not returning the user’s email or name on iOS?
This is because Apple’s Sign in with Apple feature does not always return the user’s email or name. Apple only shares this information with the app if the user explicitly grants permission. To overcome this, you can add an additional step in your app to ask the user for their email or name.
How can I request the user’s email or name after Apple Sign In on iOS?
You can use the `requestappleidcredential` method in Flutter to request the user’s email or name after Apple Sign In. This method will prompt the user to grant permission to share their email or name.
What if the user denies permission to share their email or name?
If the user denies permission, you can still create an anonymous user account in Firebase and allow them to use your app. Later, you can prompt them to update their profile with an email or name.
Is it possible to get the user’s email or name on the first sign in attempt?
No, it’s not possible to get the user’s email or name on the first sign in attempt using Apple Sign In on iOS. Apple’s privacy policies require explicit user permission to share this information.
How does Firebase handle Apple Sign In on iOS?
Firebase uses the Apple Sign In framework to authenticate users on iOS devices. Firebase then uses the received credentials to create a Firebase User object, which can be used to access Firebase services.