Facebook iOS - Error when disallowing app on SSO and then uninstalling app

Question

I've developed an app with Facebook integration and I'm testing multiple failed login scenarios. Then I've saw one that is stucking me.

The scenario is:

1. User have iOS 6 SSO configured with his account.
2. Then user open the app and DO NOT authorize it.
3. Then user removes his Facebook account from iOS.

The result:

App is getting stuck because it is getting the unauthorized information and I cannot change this anymore because the Facebook account isn't integrated to iOS anymore.

My problem is:

I need to know if the user has set his Facebook credentials on iOS (Settings > Facebook). How can I know it? I've searched Facebook documentation and could not find out.

Here is my code:

+ (void)initFacebook:(void (^)(int))initResult
{
    NSLog(@"init: activeSession.state = %i", FBSession.activeSession.state);

    [FBSession renewSystemCredentials:^(ACAccountCredentialRenewResult result, NSError *error) {
        if (result == ACAccountCredentialRenewResultFailed) {
            //User has changed his password and must update his iOS login credentials
            NSLog(@"sync: ACAccountCredentialRenewResultFailed -- error.code = %i", error.code);

            //Display some message to user…           

            //Get rid of the token with wrong credentials
            [FBSession.activeSession closeAndClearTokenInformation];
            FBSession.activeSession = [[FBSession alloc] init];

            initResult(1);
        }
        else if (result == ACAccountCredentialRenewResultRejected) {
            //User has unauthorized my App in Settings > Facebook
            NSLog(@"sync: ACAccountCredentialRenewResultRejected -- error.code = %i", error.code);

            //Display some message to user…

            //Get rid of the token with wrong credentials            
            [FBSession.activeSession closeAndClearTokenInformation];
            FBSession.activeSession = [[FBSession alloc] init];

            initResult(2);
        }
        else if (result == ACAccountCredentialRenewResultRenewed) {
            //Everything is fine with iOS credentials
            NSLog(@"sync: ACAccountCredentialRenewResultRenewed -- error.code = %i", error.code);

            //Just to be sure that the session state is right
            if (FBSession.activeSession.state == FBSessionStateCreated ||
                FBSession.activeSession.state == FBSessionStateCreatedOpening ||
                FBSession.activeSession.state == FBSessionStateCreatedTokenLoaded) {

                //Open the active session
                [FBSession openActiveSessionWithReadPermissions:@[@"basic_info", @"user_photos"]
                                                   allowLoginUI:YES
                                              completionHandler:^(FBSession *session, FBSessionState status, NSError *error) {
                                                  NSLog(@"opensession: activeSession.state = %i", FBSession.activeSession.state);


                                              }];
            }
        }
    }];
}

Thanks!

Answer 1

Your problem is that you're looking for your info in wrong place. Quit looking Facebook SDK docs and go to Social.framework documentation for that. These are about system facebook accounts.