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 *user, NSError *error) {
                      if (!error) {
                          //success
                      } 
                  }];
                 break;
             case FBSessionStateClosed:
                 //need to handle
                 break;
             case FBSessionStateClosedLoginFailed:
                 //need to handle
                 break;
             default:
                 break;
         }
     }];
}