Utilizando NSFetchedResultsController

gistfile1.m

NSFetchedResultsController *frc = [[NSFetchedResultsController alloc] initWithFetchRequest:[TGRTweet fetchRequestForAllTweets]
                                                                          managedObjectContext:managedObjectContext
                                                                            sectionNameKeyPath:nil
                                                                                     cacheName:nil];