ios - 从单元格中获取标签 - swift

Question

这是我的代码:

var username: String!

func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
    let cell : MainCell! = tableView.dequeueReusableCellWithIdentifier("MainCell") as! MainCell

    username = usernameLabel.text
    cell.button.userInteractionEnabled = true
    let tapButton = UITapGestureRecognizer(target: self, action: #selector(ViewController.tapLabel(_:)))
    cell.button.addGestureRecognizer(tapButton)

    return cell as MainCell
}

func tapButton(sender:UITapGestureRecognizer) {
    print(username) //this prints the wrong cell... why?
}

我希望能够打印变量用户名，但是当我按下按钮时它为单元格打印了错误的用户名。为什么会这样，我该如何解决？

Answer 1

在cellForRowAtIndex中添加标签

 func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
    let cell : MainCell! = tableView.dequeueReusableCellWithIdentifier("MainCell") as! MainCell

     cell.button.userInteractionEnabled = true
    cell.button.setTitle( usernameLabel.text, forState: .Normal)
     cell.button.tag = indexPath.row
     cell.button.addTarget(self, action: #selector(ViewController.tapButton(_:)), forControlEvents: .TouchUpInside)

    return cell as MainCell
}

获取 Action 为

func tapButton(sender: UIButton!) 
{
   username =  sender.titleLabel.text
    print(username)  
}