UIBarButtonItem 设置的先后顺序，顺序设置有误将导致显示时，先出现rightBarButtonItem在左边，然后移到右边。

tableView.delegate = self;

tableView.dataSource = self;

self.title = _(@"defaultBlackList");

//navigation left barbutton for editing and done

rightItem = [ [ UIBarButtonItem alloc ] initWithTitle:_(@"Edit") 

style:UIBarButtonItemStyleDone 

  target:self 

  action:@selector(startEditing)

            ];

self.navigationItem.rightBarButtonItem = rightItem;

[ rightItem release ];

self.view = tableView;

[ tableView release ];