Facebook authorization fails on iOS6 when switching FB account on device

by

Another answer gives a way to manually resync the device with the server. I defined a method called fbRsync to call this code. Make sure to #import <Accounts/Accounts.h> in your implementation file and then define this method:

-(void)fbResync
{
    ACAccountStore *accountStore;
    ACAccountType *accountTypeFB;
    if ((accountStore = [[ACAccountStore alloc] init]) && (accountTypeFB = [accountStore accountTypeWithAccountTypeIdentifier:ACAccountTypeIdentifierFacebook] ) ){

    NSArray *fbAccounts = [accountStore accountsWithAccountType:accountTypeFB];
    id account;
    if (fbAccounts && [fbAccounts count] > 0 && (account = [fbAccounts objectAtIndex:0])){

    [accountStore renewCredentialsForAccount:account completion:^(ACAccountCredentialRenewResult renewResult, NSError *error) {
        //we don't actually need to inspect renewResult or error.
        if (error){

        }
    }];
}

}

I then call fbResync if openActiveSessionWithReadPermissions yields an error:

[FBSession openActiveSessionWithReadPermissions:permissions
                                   allowLoginUI:YES
                              completionHandler:^(FBSession *session, FBSessionState state, NSError *error) {
     if(error)
     {
         NSLog(@"Session error");
         [self fbResync];
         [NSThread sleepForTimeInterval:0.5];   //half a second
         [FBSession openActiveSessionWithReadPermissions:permissions
                                            allowLoginUI:YES
                                       completionHandler:^(FBSession *session, FBSessionState state, NSError *error) {
            [self sessionStateChanged:session state:state error:error];
                                       }];

     }
     else
         [self sessionStateChanged:session state:state error:error];
 }];

The half a second delay is likely unnecessary, but it currently gives me piece of mind.

This seems to solve the problem for me. I can now switch between Facebook accounts and am able to log in. Yay!

More Related Contents:

  1. FBSDKLog: Cannot use the Facebook app or Safari to authorize, fb**** is not registered as a URL Scheme
  2. Facebook SDK 3.1 – Error validating access token
  3. Could not insert new outlet connection [duplicate]
  4. UIPageViewController navigates to wrong page with Scroll transition style
  5. How to make a push notification for a pass
  6. What are Unwind segues for and how do you use them?
  7. Attempt to present UIViewController on UIViewController whose view is not in the window hierarchy
  8. How to force a UIViewController to Portrait orientation in iOS 6
  9. UILabel sizeToFit doesn’t work with autolayout ios6
  10. Programmatically Request Access to Contacts
  11. File is universal (three slices), but it does not contain a(n) ARMv7-s slice error for static libraries on iOS, anyway to bypass?
  12. Detect if the app was launched/opened from a push notification
  13. shouldAutorotateToInterfaceOrientation not being called in iOS 6
  14. App crashed in iOS 6 when user changes Contacts access permissions
  15. Circular Progress Bars in IOS
  16. UICollectionView flowLayout not wrapping cells correctly
  17. iOS Autolayout – How to set two different distances between views, depends on the screen height
  18. iOS 6 shouldAutorotate: is NOT being called
  19. iOS 9 Facebook login simulator -canOpenURL: failed for URL: “fbauth2:///” – error: “(null)”
  20. dismissModalViewControllerAnimated deprecated
  21. presentRequestsDialogModallyWithSession does not work, but gives good result
  22. Dynamically setting layout on UICollectionView causes inexplicable contentOffset change
  23. is groupTableViewBackgroundColor deprecated on iOS 6?
  24. Like button in iOS application
  25. nib but didn’t get a UITableView
  26. No such module ‘RestKit’ with cocoapods and swift
  27. Different data for sharing providers in UIActivityViewController
  28. Creating an android smart app banner
  29. Handle invalid accessToken with FBSession openActiveSessionWithReadPermissions in Facebook iOS 3.1.1 SDK
  30. Make UICollectionView zoomable?

Leave a Comment