使用Swift将UIButton添加到UITableViewCell的中心

以下代码仅显示表格最后一行中的按钮。有什么想法吗

而不是

button.center = self.view.center

试一试

这假设您的tableView为全宽，cellHeight为44.0。您还无法从单元格本身获取实际高度。如果需要实际高度，则必须从tableView:willDisplayCell:forrowatinexpath:method或执行其他操作获取

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另外，您不应该使用self.myTable，而应该在方法本身中使用tableView变量。

Jawwad的建议修复了它。对于文档，这里是整个工作功能：

func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {              

        var cell:UITableViewCell = tableView.dequeueReusableCellWithIdentifier("cell") as UITableViewCell  

        let button : UIButton = UIButton.buttonWithType(UIButtonType.Custom) as UIButton
        button.frame = CGRectMake(40, 60, 100, 24)
        let cellHeight: CGFloat = 44.0
        button.center = CGPoint(x: view.bounds.width / 2.0, y: cellHeight / 2.0)
        button.backgroundColor = UIColor.redColor()
        button.addTarget(self, action: "buttonClicked:", forControlEvents: UIControlEvents.TouchUpInside)
        button.setTitle("Click Me !", forState: UIControlState.Normal)

        cell.addSubview(button)

        return cell;   
}

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如果有人正在寻找上述答案的Swift 3转换，请尝试以下方法：

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let cell = tableView.dequeueReusableCell(withIdentifier: textCellIdentifier, for: indexPath)

    let button : UIButton = UIButton(type:UIButtonType.custom) as UIButton

    button.frame = CGRect(origin: CGPoint(x: 40,y :60), size: CGSize(width: 100, height: 24))
    let cellHeight: CGFloat = 44.0
    button.center = CGPoint(x: view.bounds.width / 2.0, y: cellHeight / 2.0)
    button.backgroundColor = UIColor.red
    button.addTarget(self, action: #selector(buttonClicked), for: UIControlEvents.touchUpInside)
    button.setTitle("Click Me !", for: UIControlState.normal)

    cell.addSubview(button)
    return cell
}

func buttonClicked(sender : UIButton!) {
    print("Clicked!")
}

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你在返回牢房前有一个杂散的支架。这不应该导致这个问题。也许按钮中心应该参照单元格而不是self.view？

func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {              

        var cell:UITableViewCell = tableView.dequeueReusableCellWithIdentifier("cell") as UITableViewCell  

        let button : UIButton = UIButton.buttonWithType(UIButtonType.Custom) as UIButton
        button.frame = CGRectMake(40, 60, 100, 24)
        let cellHeight: CGFloat = 44.0
        button.center = CGPoint(x: view.bounds.width / 2.0, y: cellHeight / 2.0)
        button.backgroundColor = UIColor.redColor()
        button.addTarget(self, action: "buttonClicked:", forControlEvents: UIControlEvents.TouchUpInside)
        button.setTitle("Click Me !", forState: UIControlState.Normal)

        cell.addSubview(button)

        return cell;   
}

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let cell = tableView.dequeueReusableCell(withIdentifier: textCellIdentifier, for: indexPath)

    let button : UIButton = UIButton(type:UIButtonType.custom) as UIButton

    button.frame = CGRect(origin: CGPoint(x: 40,y :60), size: CGSize(width: 100, height: 24))
    let cellHeight: CGFloat = 44.0
    button.center = CGPoint(x: view.bounds.width / 2.0, y: cellHeight / 2.0)
    button.backgroundColor = UIColor.red
    button.addTarget(self, action: #selector(buttonClicked), for: UIControlEvents.touchUpInside)
    button.setTitle("Click Me !", for: UIControlState.normal)

    cell.addSubview(button)
    return cell
}

func buttonClicked(sender : UIButton!) {
    print("Clicked!")
}