After updating my Flutter project to version 3.0.0, I'm no longer able to build on iOS.

Error:

    [!] CocoaPods could not find compatible versions for pod "FBSDKCoreKit":
      In Podfile:
        FBSDKCoreKit (= 4.39.1)
        flutter_facebook_login (from `.symlinks/plugins/flutter_facebook_login/ios`) was resolved to 0.0.1, which depends on
          FBSDKCoreKit (~> 5.5)
    Specs satisfying the `FBSDKCoreKit (= 4.39.1), FBSDKCoreKit (~> 5.5)` dependency were found, but they required a higher minimum deployment target.

This is even with setting a minimum deployment target of 11.0 both in the Podfile, and in the Xcode project settings.

flutter doctor:

Doctor summary (to see all details, run flutter doctor -v):
[✓] Flutter (Channel stable, v1.9.1+hotfix.4, on Mac OS X 10.14.4 18E226, locale en-GB)
 
[✓] Android toolchain - develop for Android devices (Android SDK version 28.0.3)
[✓] Xcode - develop for iOS and macOS (Xcode 10.2)
[✓] Android Studio (version 3.5)
[✓] VS Code (version 1.39.1)
[✓] Connected device (3 available)

• No issues found!

pod --version is 1.8.3

Already run pod repo update prior to building the app.

None of this is a problem with version 2.x.

This is to prevent exceptions when updating the ValueNotifier after the parent widget is disposed following a successful sign in.

This is to prevent exceptions when updating the ValueNotifier after the parent widget is disposed following a successful sign in.

error Exception has occurred. PlatformException (PlatformException(sign_in_failed, com.google.android.gms.common.api.ApiException: 12500: , null))

please resolve this problem

@SaputraGo I'm closing this but feel free to open a new issue if you still have problems.

I am trying to get the 'Sign in aborted by user.' dialog box to show when I close the Google Sign In. Right now when I click close the app crashes and this is what appears:

Exception has occurred.

PlatformException (PlatformException(sign_in_canceled, com.google.GIDSignIn, The user canceled the sign-in flow.))

The line appears on the following line of code in the Auth.dart file:

GoogleSignInAccount googleUser = await googleSignIn.signIn();

Just to test the functionality of the dialog box, I changed the if statement in auth.dart from:

if (googleUser != null)

to

if (googleUser == null)

This results in the dialog box appearing. So throwing the PlatformException must be working correctly. It seems like the problem is that the app crashes before the program checks if the user is null.

I have even tried directly catching the error like this:

GoogleSignInAccount googleUser;
      try {
        googleUser = await googleSignIn.signIn();
      } catch (e) {
        throw PlatformException(
          code: "ERROR_ABORTED_BY_USER",
          message: 'Sign in aborted by user.',
          );
      }

I think that googleSignIn.signIn() might be returning an exception instead of null, but I have the same version as the videos.

Closing this - feel free to reopen if there are still issues.

Thank you for sharing this amazing repo.

Just a quick request/question.

• How do I show user information after signing in?

@urbanmania see #39 which moves the auth StreamBuilder above the MaterialApp. This should fix any problems with Providers not found.

Hello, Thanks for the article... How do you add multiple provider,,, Suppose , I have another provider name shopping that I also need down stream...

Thanks

Thanks for a great demo! I'm running into an issue trying to incorporate navigation after the user has successfully logged in.

Problem

When I call Navigator.push(context, <any_route>) it causes the LandingPage widget tree to be rebuilt, which then recreates the StreamBuilder<User>. Upon successful login, I changed your code to return an AuthenticatedLandingPage widget instead of HomePage so I can load the user's profile before displaying the home page. Unfortunately, every time I navigate it reloads their profile due to the rebuilding.

Question

Do you have any established best practices for dealing with loading data like this after logging in? I know the build method can be called at anytime it just seems like using StreamBuilder inside of build results in lots of recreations of the User stream (and any subsequent data streams dependent on the User like in my case UserProfile).

Code

// LandingPage.dart

class LandingPage extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return StreamBuilder<FirebaseUser>(
      stream: FirebaseAuth.instance.onAuthStateChanged,
      builder: (context, snapshot) {
        if (snapshot.connectionState == ConnectionState.active) {
          if (!snapshot.hasData) {
            return AuthSplashPage();
          }
          
          final user = snapshot.data;
          return Provider<FirebaseUser>.value(
            value: user,
            child: const AuthenticatedLandingPage(),
          );
        }

        return _loadingScreen("Authenticating");
      },
    );
  }
}

class AuthenticatedLandingPage extends StatelessWidget {
  const AuthenticatedLandingPage();

  @override
  Widget build(BuildContext context) {
    // this gets rebuilt every time we navigate in the app
    final user = Provider.of<FirebaseUser>(context);
    final userService = Provider.of<UserService>(context);

    return StreamBuilder<UserProfile>(
      stream: userService.streamProfile(user.uid), // calls Firestore.instance.collection("user_profile").document(user.uid).snapshots()
      builder: (context, snapshot) {
        if (snapshot.connectionState == ConnectionState.active) {
          if (!snapshot.hasData) {
            return OnboardingSplashPage();
          }

          final profile = snapshot.data;
          return Provider<UserProfile>.value(
            value: profile,
            child: const HomePage(),
          );
        }

        return _loadingScreen("Loading profile");
      },
    );
  }
}

Thanks!

@narciero Take a look at the latest changes: #39.

With this setup, the auth state StreamBuilder has been moved above the MaterialApp, and I no longer see the rebuilds. I have tested that this works when pushing a new route, as well as showing the on-screen keyboard.

Closing - but let me know if you have more questions

This is used to create user-bound providers if there is a signed-in user.

Solves the problem of providers that are not accessible inside pushed routes.

TODO

• [x] Add AuthWidget class
• [x] Add tests
• [x] Update architecture diagrams
• [x] Test StreamBuilder rebuilds not called when pushing routes (see #32)
• [x] Update FirebaseEmailLinkHandler to use PublishSubject instead of BehaviorSubject to avoid duplicate alerts when the auth state changes. Updated tests

This is used to create user-bound providers if there is a signed-in user.

Solves the problem of providers that are not accessible inside pushed routes.

TODO

• [x] Add AuthWidget class
• [x] Add tests
• [ ] Update architecture diagrams

Thanks for contributing everyone!

MissingPluginException(No implementation found for method pickImage on channel com.musevisions.flutter/imagePicker)

@shadyshrif done. Please note that this was an example project to show how to use platform channels, so it was deliberately not using the official image picker plugin.

The current channels cause expectation: Missing plugin Exception #3

I added a dependency to package image_picker and solved the issue. I test it on Android and IOS

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@yasinarik A couple of things worth noting:

• Your pod repo may be updated. Have you tried running pod repo update?
• You're running on Xcode 9.4.1. Have you tried updating to Xcode 10 or 11?

Let me know if any of these fixes your problem.

@narciero thanks for mentioning this.

I have encountered this problem in various projects, however I haven't found a good solution yet. One idea worth exploring is to convert the LandingPage into a StatefulWidget that holds a subscription to the onAuthStateChanged stream.

This way, a local FirebaseUser variable can be stored and updated when the user changes. And this may reduce unnecessary StreamBuilder rebuilds.

NOTE: I'm mentioning this as something worth exploring - I haven't tested it in practice.

@srihamat thank you very much for contributing. Merged.

You mention in the readme, that we have to download and install a google-services.json, but you don't mention, where it can be downloaded. Could you add that info, please? Thank you!

Reason: I think that somebody, who comes to this site directly and does not know about Firebase or your course or whatever, should get all information needed to be well-informed what to do. In this case it would help to make things very clear, when sth like "Download google-services.json from your firebase account that is needed for this project."

This is even helpful for people, who already worked through your tutorial and come back to it sometimes later. Thank you!

Thanks all for contributing to this. I have now merged this to master.

Added how to setup firebase (googleservice.json) Ref: https://github.com/bizz84/firebase_auth_demo_flutter/issues/34