Utilizando NSFetchedResultsController

gistfile1.m

- (void)controller:(NSFetchedResultsController *)controller
   didChangeObject:(id)anObject
	   atIndexPath:(NSIndexPath *)indexPath
	 forChangeType:(NSFetchedResultsChangeType)type
	  newIndexPath:(NSIndexPath *)newIndexPath
{
    // Aquí podemos utilizar los métodos de UITableView para
    // actualizar nuestra tabla
}