Detect iOS Google+ Sign In was incomplete.

Question

By \"incomplete\" I\'m referring to a particular user journey

• user opens iOS application, and chooses Google+ to sign in.
• Google SDK navigates user to G+

Answer 1

As per the situation described, that a user has skipped the authentication process of Google Sign in or has navigate to Home Screen by tapping home button.

1st Way:-

On that basis, GPPSignInDelegate never gets called

- (void)finishedWithAuth: (GTMOAuth2Authentication *)auth
                   error: (NSError *) error {
    NSLog(@"Received error %@ and auth object %@",error, auth);
}

Now, if the developer is saving the Google Plus auth key in NSUserDefault or a in a plist or in local DB , then he directly check it in didBecomeActive method of AppDelegate .

-(void)applicationDidBecomeActive:(UIApplication *)application
{
  //Check whether Google Plus auth key is present from the stored location or variable    
}

2nd Way:-

In applicationDidBecomeActive method one can directly check if authentication is completed or not

-(void)applicationDidBecomeActive:(UIApplication *)application
    {
       if ([[GPPSignIn sharedInstance] authentication]) {
             // The user has  signed in properly
           }
        else
         {
               // The user has  not  signed in properly
         }
    }