在实现系统提示菜单时，一般用户的行为是，长按给出系统提示菜单
下例子为长按弹出系统复制菜单，并给予实现
- (BOOL) tableView:(UITableView *)tableView shouldShowMenuForRowAtIndexPath:(NSIndexPath *)indexPath
{
return YES;
}
- (BOOL) tableView:(UITableView *)tableView canPerformAction:(SEL)action forRowAtIndexPath:(NSIndexPath *)indexPath withSender:(id)sender
{
if (action == @selector(copy:)) {
return YES;
}
return NO;
}
- (void) tableView:(UITableView *)tableView performAction:(SEL)action forRowAtIndexPath:(NSIndexPath *)indexPath withSender:(id)sender
{
if (action == @selector(copy:)) {
UITableViewCell *cell = [tableView cellForRowAtIndexPath:indexPath];
UIPasteboard *pasteBorad = [UIPasteboard generalPasteboard];
[pasteBorad setString:cell.textLabel.text];
}
}
