iOS restorePreviousSignIn: restorePreviousSignIn is not triggered in v6.0.1 when reopen the app.

[Haibo-Zhou]

Hello, my iOS app can't restorePreviousSignIn in v6.0.1.

Before, I used signIn:didSignInForUser:withError: to restore user signIn state, and it works fine.
Now, I follow your migration guide, to Move the logic from signIn:didSignInForUser:withError: to the callback block of signInWithConfiguration:presentingViewController:callback:.

Now, I put signInWithConfiguration:presentingViewController:callback: into Google signIn button, I could sign in but when I close and reopen my app, signInWithConfiguration:presentingViewController:callback: is not triggered, then I couldn't restore the previous user signIn state.

Is this the correct position it should be, how could I fix this issue? This version is quite new, I couldn't find related issue in internet, please help, guys.

@objc func signInButtonTapped(_ sender: Any) {
        GIDSignIn.sharedInstance.signIn(with: modelController.signInConfig, presenting: self) { [weak self] user, error in
            
            if let error = error {
                print("SignIn failed, \(error), \(error.localizedDescription)")
            } else {
                print("Authenticate successfully")
                let driveScope = "https://www.googleapis.com/auth/drive.readonly"
                guard let user = user else { return }
    
                let grantedScopes = user.grantedScopes
                print("scopes: \(String(describing: grantedScopes))")
                
                if grantedScopes == nil || !grantedScopes!.contains(driveScope) {
                    // Request additional Drive scope if it doesn't exist in scope.
                    GIDSignIn.sharedInstance.addScopes([driveScope], presenting: self!) { user, error in
                        if let error = error {
                            print("add scope failed, \(error), \(error.localizedDescription)")
                        }

                        guard let user = user else { return }

                        // Check if the user granted access to the scopes you requested.
                        if let scopes = user.grantedScopes,
                           scopes.contains(driveScope) {
                            print("Scope added")
                            print("NEW scopes: \(String(describing: scopes))")
                            self?.createGoogleDriveService(user: user)
                        }
                    }
                }
            }
        }
    }

func createGoogleDriveService(user: GIDGoogleUser) {
        let service = GTLRDriveService()
        service.authorizer = user.authentication.fetcherAuthorizer()

        // dependency inject
        modelController.googleAPIs = GoogleDriveAPI(service: service)

        // Post notification after user successfully sign in
        NotificationCenter.default.post(name: .signInGoogleCompleted, object: nil)
        
        user.authentication.do { [weak self] authentication, error in
            guard error == nil else { return }
            guard let authentication = authentication else { return }
            
            // Or, get an object that conforms to GTMFetcherAuthorizationProtocol for
            // use with GTMAppAuth and the Google APIs client library.
            let service = GTLRDriveService()
            service.authorizer = authentication.fetcherAuthorizer()
            
            // dependency inject
            self?.modelController.googleAPIs = GoogleDriveAPI(service: service)
            
            // Post notification after user successfully sign in
            NotificationCenter.default.post(name: .signInGoogleCompleted, object: nil)
        }
    }

previous restore logic code

func sign(_ signIn: GIDSignIn!, didSignInFor user: GIDGoogleUser!, withError error: Error!) {
        if let error = error {
            print("SignIn failed, \(error), \(error.localizedDescription)")
        } else {
            print("Authenticate successfully")
            let service = GTLRDriveService()
            service.authorizer = user.authentication.fetcherAuthorizer()

            // dependency inject
            modelController.googleAPIs = GoogleDriveAPI(service: service)

            // Post notification after user successfully sign in
            NotificationCenter.default.post(name: .signInGoogleCompleted, object: nil)
        }
    }

[petea]

Are you making a call to restorePreviousSignInWithCallback:, passing a GIDSignInCallback block to be called on completion?

[Haibo-Zhou]

Yes, I make that call. And I found the reason why I cannot restore the login yesterday. I need to put code which creates google api service into restorePreviousSignInWithCallback: 's call back.

Before I only need to create google api service once in the delegate sign(didSignInFor) method, however now I need to put it in two places, one in signIn button and another in restorePreviousSignInWithCallback.

[Haibo-Zhou]

Close as not an issue on API.