gistfile1.m

- (void)tableView:(UITableView *)tableView moveRowAtIndexPath:(NSIndexPath *)fromIndexPath toIndexPath:(NSIndexPath *)toIndexPath
{
    NSInteger newIndex = toIndexPath.row;
    NSInteger oldIndex = fromIndexPath.row;
    
    EKReminder *movedReminder = self.remindersList[oldIndex];
    
    [self.remindersList removeObjectAtIndex:oldIndex];
    [self.remindersList insertObject:movedReminder atIndex:newIndex];
    
    movedReminder.sortOrder = newIndex;
}