When I use the apple to log in, the selection box will pop up. I choose to use the password to continue and the prompt is not complete

Question

iOS13 (beta) Apple Login error

@available(iOS 13.0, *)
    func authorizationController(controller: ASAuthorizationController, didCompleteWithError error: Error)         


        

Answer 1

From Apple's example,

performExistingAccountSetupFlows, only call this method once on viewDidAppear. If user info exists already then Apple will show it to login. If not then it will throw error.

handleAuthorizationAppleIDButtonPress, whenever user taps on Sign in with Apple button, note that if an account already had existed it would have shown it to the user already. I believe its still in progress and not all use cases are covered, for example if user sees the login info initially from ViewDidAppear call and cancels it then user have to create a new account when tapping on this method since its missing ASAuthorizationPasswordProvider request. If user had some login info then in that case this call (with ASAuthorizationPasswordProvider) will succeed but if no data is available then user will not see any action on tapping this button since it will throw error.

I am still figuring this out, if I have anything more to add then I will update the answer. So, for now we can only have this one use case to use this Sign in with Apple option.

Update: Once I created a new account, I was offered by this same flow to login with the already existing account. So, I can say that there is no need to include call to ASAuthorizationPasswordProvider request in handleAuthorizationAppleIDButtonPress method. I am doing all the testing on device.

You can always go to Settings -> AppleId -> Password & Security -> Apple ID Logins to check and delete account if you need to test various scenarios.

Update 2: Everything seems to work fine in other scenarios too if you already have a saved password or App Id account created, so even if I pass ASAuthorizationPasswordProvider in the handleAuthorizationAppleIDButtonPress call, it is working fine. I would suggest to not pass ASAuthorizationPasswordProvider in the next call and keep the flow as described above, this way if no saved password is present or Apple Id created then it will provide option to the user to create a new id, if there is already an id that exists then it will show that id.

 override func viewDidAppear(_ animated: Bool) {
        super.viewDidAppear(animated)
        performExistingAccountSetupFlows()
    }

    func performExistingAccountSetupFlows() {
        // Prepare requests for both Apple ID and password providers.
        let requests = [ASAuthorizationAppleIDProvider().createRequest(),
                        ASAuthorizationPasswordProvider().createRequest()]

        // Create an authorization controller with the given requests.
        let authorizationController = ASAuthorizationController(authorizationRequests: requests)
        authorizationController.delegate = self
        authorizationController.presentationContextProvider = self
        authorizationController.performRequests()
    }

    @objc
    func handleAuthorizationAppleIDButtonPress() {
        let appleIDProvider = ASAuthorizationAppleIDProvider()
        let request = appleIDProvider.createRequest()
        request.requestedScopes = [.fullName, .email]

        let authorizationController = ASAuthorizationController(authorizationRequests: [request])
        authorizationController.delegate = self
        authorizationController.presentationContextProvider = self
        authorizationController.performRequests()
    }