Just a small piece of code to get the basic info + profile picture

NSObject+FacebookImage

+ (void(^)())facebookImageBlockWithCompletionHandler:(void(^)(id profilePicture, id userInformation, NSError *error))completionHandler
{
    void(^facebookBlock)()= ^{[FBSession openActiveSessionWithReadPermissions:@[@"basic_info", @"email"]
                                                                 allowLoginUI:YES
                                                            completionHandler:^(FBSession *session,
                                                                                FBSessionState status,
                                                                                NSError *error)
                               {
                                   if (!error)
                                   {
                                       if (status != FBSessionStateOpen)
                                       {
                                           // Don't do anything, just return it
                                           return;
                                       }
                                       
                                       [FBRequestConnection startForMeWithCompletionHandler:^(FBRequestConnection *userInfoConnection, id userInfo, NSError *error1)
                                        {
                                            [FBRequestConnection startWithGraphPath:@"me?fields=picture.type(large)" completionHandler:^(FBRequestConnection *userPictureConnection, id profilePicture, NSError *errorr2)
                                             {
                                                 if(errorr2)
                                                 {
                                                     completionHandler(nil,nil,error);
                                                 }
                                                 else
                                                 {
                                                     completionHandler(profilePicture,userInfo,nil);
                                                 }
                                             }];
                                        }];
                                   }
                                   else
                                   {
                                       completionHandler(nil,nil,error);
                                   }
                               }];};
    
    return facebookBlock;
}