Facebook authorization fails on iOS6 when switching FB account on device

Question

I\'m using die Facebook SDK 3.1.1 to implement FB Connect in my iOS application. This works fine in the simple case with either the new FB integration (logged in on iOS) or

Answer 1

In ios 6 with fb sdk 3.1.1. Please pass permissions param as "nil or email" in "[FBSessio openActiveSessionWithReadPermissions..." method. Here my code it was works great.

#define IOS_NEWER_OR_EQUAL_TO_6 ( [ [ [ UIDevice currentDevice ] systemVersion ] floatValue ] >= 6.0 )

-(void)showFBLogin
{
    [FBSession.activeSession closeAndClearTokenInformation];

    NSArray *permissions = [NSArray arrayWithObjects:@"email, publish_actions, publish_stream", nil];

#ifdef IOS_NEWER_OR_EQUAL_TO_6
    permissions = nil; or NSArray *permissions = [NSArray arrayWithObjects:@"email",nil];
#endif

    NSLog(@"\npermissions = %@", permissions);
    [FBSession openActiveSessionWithReadPermissions:permissions
                                       allowLoginUI:YES
                                  completionHandler:
     ^(FBSession *session,
       FBSessionState state, NSError *error) {
         NSLog(@"\nfb sdk error = %@", error);
         switch (state) {
             case FBSessionStateOpen:
                 [[FBRequest requestForMe] startWithCompletionHandler:
                  ^(FBRequestConnection *connection, NSDictionary<FBGraphUser> *user, NSError *error) {
                      if (!error) {
                          //success
                      } 
                  }];
                 break;
             case FBSessionStateClosed:
                 //need to handle
                 break;
             case FBSessionStateClosedLoginFailed:
                 //need to handle
                 break;
             default:
                 break;
         }
     }];
}

Answer 2

I had the same problem. Check that your FB App is enabled in Settings -> Facebook. Mine was disabled (even though I don't remember disabling it) and once I enabled it, it was fixed.

In my test process, I've added and removed my FB App several times from my FB Account, which is linked with my iPhone. It may explain why, magically, my app was disabled.

Answer 3

I have the same problem on 3.1.3 FB SDK with iOS7.1. And I find a solution here. Hope it help!!
I have tried all answers here.
@loganathan nil permissions, @ill_always_be_a_warriors fbResync.
All of those don't work for me.

But I found it will works well when I launch the same code in iPhone 7.1 simulator
(without SSO"Single Sign On")

The same code works well on old version iOS FB SDK(not sure which version, but not 3.13)
(but no SSO will show when try to login)

So, I try to re-write a sample problem. I found several different here.
1. https://developers.facebook.com/docs/ios/getting-started Add new FacebookDisplayName
2. I modify my BundleID for iTune connect but I am not update it back to Faceboook App Dev


After modify those setting, it works on my iOS app with SSO feature.
Hope it help!!

Answer 4

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!

Answer 5

Did you Try the RenewSystemCredential Methods? Take a look at this post:

Facebook iOS SDK extendAccessToken not Working - fbDidExtendToken not being called

Answer 6

I got the same error. But i used @ill_always_be_a_warriors method: -(void)fbResync but not work for me.

I finally found it's my permissions issue, i removed offline_access permission, it works, hope it helps some one.