快速单击表格中的按钮时删除和插入新按钮

Question

我正在做一个 swift 项目，我有一个包含 3 个单元格的表格视图，我想删除第三个单元格中的所有按钮并在有人单击第二个单元格上的任何按钮时插入新按钮，代码如下这个

    override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
        var cell: DateTableViewCell!
        if indexPath.row == 0 {
            // First row code goes here
        } else if indexPath.row == 1 {
            for index in 0...6 {
                var button: UIButton = UIButton.buttonWithType(UIButtonType.Custom) as!UIButton
                button.frame = CGRectMake(CGFloat(intXTile), CGFloat(28), CGFloat(40), CGFloat(30))
                button.setTitle("Button Title", forState: UIControlState.Normal)
                button.addTarget(self, action: "buttonClicked:", forControlEvents: .TouchUpInside)
                cell.addSubview(button)
            }
        } else if indexPath.row == 2 {
            // Third row code goes here 
        }
    }

    func buttonClicked(sender: UIButton!) {
        var btn:UIButton = sender
        let subviews = sender.superview?.superview?.subviews as! [UIView]
        for aSubview in self.tableView.cellForRowAtIndexPath(NSIndexPath(forRow: 2, inSection: 0))!.contentView.subviews {
            if aSubview is UIButton {
                aSubview.removeFromSuperview()
            }

            var answerText: Array<String?> = ["Button5","Button6","Button7","Button8"]

            var answerButton: Array<UIButton> = []

            for var i = 0; i<=answerText.count; i++ {

                var button = UIButton.buttonWithType(.System) as! UIButton

                button.titleLabel!.font = UIFont.systemFontOfSize(12)

                button.titleLabel!.lineBreakMode = .ByTruncatingTail

                var numberOfButton = 5
                let j = i
                var y:CGFloat  = (CGFloat)(j*290/(numberOfButton+1)-1);
                button.frame.size.height = 30
                button.frame.size.width = 200
                button.frame.origin.y = y
                button.frame.origin.x = 50.0
                answerButton .insert(button, atIndex: i)

            }

            for var i = 0; i<answerText.count; i++ {

                var button:UIButton = answerButton [i]

                button.setTitle(answerText[i], forState: UIControlState.Normal)

                aSubview.addSubview(button)
            }

    }
     }

Story Board 中的数据表视图控制器场景是这样的

当点击任何第二个单元格按钮时，将调用“buttonClicked”方法，我需要删除并使用新数据更新按钮，现在它向第三个单元格添加新按钮，但不会删除现有的按钮，我还需要将按钮正确放置在第三个单元格中，从过去 2 天开始我一直在努力完成这项工作，有人可以帮我解决这个问题，非常感谢。

Answer 1

尝试使用此代码

let contents = self.tableView.cellForRowAtIndexPath(NSIndexPath(forRow: 2, inSection: 0))?.contentView
for i in 1...3 {
    contents.viewWithTag(i)?.removeFromSuperview()
}