相关疑难解决方法(0)

我有UITableView.我想添加一个UITextField上面的tableView,可以通过拉下tableView来访问它.我想通过拉取tableView来隐藏我的textField.我怎样才能做到这一点？这是我试过的:

[self.messagesTableView addSubview:self.messageField];

- (UITextField*)messageField
{
    if (!_messageField)
    {
        _messageField = [[UITextField alloc] initWithFrame:CGRectMake(0, 0, self.messagesTableView.frame.size.width, kMessageFieldHeight)];
        _messageField.autoresizingMask = UIViewAutoresizingFlexibleWidth;
        _messageField.backgroundColor = [UIColor greenColor];
    }
    return _messageField;
}

- (void)scrollViewDidScroll:(UIScrollView*)scrollView
{
    if (scrollView == self.messagesTableView)
    {
        CGRect newFrame = self.messagesTableView.frame;
        newFrame.origin.y = self.messagesTableView.contentOffset.y + kMessageFieldHeight;
        self.messagesTableView.frame = newFrame;
    }
}