iOS开发长按tabbaleVew

实现步骤:
1.给cell添加UILongPressGestureRecognizer和相应处理事件

• (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
  {
  ..............
  UILongPressGestureRecognizer * longPressGesture = [[UILongPressGestureRecognizer alloc]initWithTarget:selfaction:@selector(cellLongPress:)];
  [cell addGestureRecognizer:longPressGesture];
  return cell;
  }
  2.配置和显示UIMenuController

• (void)cellLongPress:(UIGestureRecognizer *)recognizer{
  if (recognizer.state == UIGestureRecognizerStateBegan) {
  CGPoint location = [recognizer locationInView:self];
  NSIndexPath * indexPath = [self indexPathForRowAtPoint:location];
  UIMyTableViewCell *cell = (UIMyTableViewCell *)recognizer.view;
  　　　　　//这里把cell做为第一响应(cell默认是无法成为responder,需要重写canBecomeFirstResponder方法)
  [cell becomeFirstResponder];

    UIMenuItem *itCopy = [[UIMenuItem alloc] initWithTitle:@"复制" action:@selector(handleCopyCell:)];
    UIMenuItem *itDelete = [[UIMenuItem alloc] initWithTitle:@"删除" action:@selector(handleDeleteCell:)];        
    UIMenuController *menu = [UIMenuController sharedMenuController];
  

[menu setMenuItems:[NSArray arrayWithObjects:itCopy, itDelete, nil]];
[menu setTargetRect:cell.frame inView:self];
[menu setMenuVisible:YES animated:YES];

    [itCopy release];
    [itDelete release];
}

}

• (void)handleCopyCell:(id)sender{//复制cell
  NSLog(@"handle copy cell");
  }

• (void)handleDeleteCell:(id)sender{//删除cell
  NSLog(@"handle delete cell");
  }

3.在自定义的cell里重写canBecomeFirstResponder方法，返回yes
//为了让菜单显示，目标视图必须在responder链中，很多UIKit视图默认并无法成为一个responder，因此你需要使这些视图重载 canBecomeFirstResponder方法，并返回YES

• (BOOL)canBecomeFirstResponder{
  return YES;
  }

经过这几步，就可以成功显示了，又在网上看到一篇讲这个的外文，分享一下：
http://www.intridea.com/blog/2010/12/22/developers-notes-for-uimenucontroller