http://stackoverflow.com/questions/13859570/insert-new-rows-in-uitableview-after-refreshing-table#comment19084578_13859570

gistfile1.m

AFJSONRequestOperation *operationJSON = [AFJSONRequestOperation
                                           JSONRequestOperationWithRequest:requestJSON
                                           success:^(NSURLRequest *request, NSHTTPURLResponse *response, id JSON) {
                                               NSMutableArray *results = [JSON valueForKey:@"results"];

                                               // UPDATED CODE

                                               for (id obj in [results valueForKey:@"value"]) {
                                                   if (![items containsObject:obj]) {
                                                       [items addObject:obj];
                                                   }
                                               }

                                               for (id obj2 in [results valueForKey:@"value2"]) {
                                                   if (![items2 containsObject:obj2]) {
                                                       [items2 addObject:obj2];
                                                   }
                                               }

                                               // END OF UPDATED CODE
                                               /**
                                                  AFJSONOperation dispatches work to background thread. UIKit is not thread-safe      . So dispatching work to main queue.
                                                */
                                              dispatch_async(dispatch_get_main_queue(),^{
                                               [table reloadData];
                                               [table scrollRectToVisible:CGRectMake(0, 0, 1, 1) animated:YES];
                                               [table.pullToRefreshView stopAnimating];
                                              });
                                           }
                                           failure:^(NSURLRequest *request, NSHTTPURLResponse *response, NSError *error, id JSON) {
                                               NSLog(@"%@", [error userInfo]);
                                           }];
  [operationJSON start];
  [table reloadData];
}