Question

我正在tableView进行一个有4个按钮（选项）的测验，我在201,202,203,204这样的故事板上标记它们，并且用tableView方法成功地完成了所有这些测验。但是在向按钮添加目标后，我无法在buttonClicked方法中获得特定按钮。

func numberOfSectionsInTableView(tableView: UITableView) -> Int { return 1 }
func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int { return questions.count }

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

    (cell.viewWithTag(100) as! UILabel).text = "Q : " + (questions[indexPath.row].objectForKey("MocQuestion")! as? String)!
    (cell.viewWithTag(100) as! UILabel).font = themeFont
    (cell.viewWithTag(101) as! UILabel).text = questions[indexPath.row].objectForKey("Op1")! as? String
    (cell.viewWithTag(102) as! UILabel).text = questions[indexPath.row].objectForKey("Op2")! as? String
    (cell.viewWithTag(103) as! UILabel).text = questions[indexPath.row].objectForKey("Op3")! as? String
    (cell.viewWithTag(104) as! UILabel).text = questions[indexPath.row].objectForKey("Op4")! as? String

    let btn1 = (cell.viewWithTag(201) as! UIButton)
    let btn2 = (cell.viewWithTag(202) as! UIButton)
    let btn3 = (cell.viewWithTag(203) as! UIButton)
    let btn4 = (cell.viewWithTag(204) as! UIButton)


//        btn1.tag = indexPath.row * 100 + 0
//        btn1.tag = indexPath.row * 100 + 1
//        btn1.tag = indexPath.row * 100 + 2
//        btn1.tag = indexPath.row * 100 + 3


    btn1.addTarget(self, action: #selector(Quiz.buttonClicked(_:)),forControlEvents: UIControlEvents.TouchUpInside)
    btn2.addTarget(self, action: #selector(Quiz.buttonClicked(_:)),forControlEvents: UIControlEvents.TouchUpInside)
    btn3.addTarget(self, action: #selector(Quiz.buttonClicked(_:)),forControlEvents: UIControlEvents.TouchUpInside)
    btn4.addTarget(self, action: #selector(Quiz.buttonClicked(_:)),forControlEvents: UIControlEvents.TouchUpInside)

    return cell
}

func buttonClicked(sender:UIButton)
{
    let tag = sender.tag
    print(tag)
}

Answer 1

如果您希望indexPath访问问题Array，那么您可以尝试这样做。

func buttonClicked(sender:UIButton) {
    let center = sender.center
    let point = sender.superview!.convertPoint(center, toView:self.tableView)
    let indexPath = self.tableView.indexPathForRowAtPoint(point)
    //Now you have tag of button check for that
    if (sender.tag == 201) {
        print("Option A")
    }
    else if (sender.tag == 202) {
        print("Option B")
    }
    else if (sender.tag == 203) {
        print("Option C")
    }
    else {
        print("Option D")
    }
    print(question[indexPath.row])
}

Answer 2

为了获得每个问题单独的按钮click event，您可以将唯一ID作为后缀或前缀，例如每个问题的20101或01201作为按钮标记而不是硬编码。然后获取标签并首先提取问题ID，现在按照问题进行检查。

Answer 3

在 swift 3 你可以尝试下面像

我的表格单元格类

class Custom_Cell: UITableViewCell {    

  @IBOutlet weak var ButtonA: UIButton!
  @IBOutlet weak var ButtonB: UIButton!
  @IBOutlet weak var ButtonC: UIButton!

 }

在表格视图中设置标记

  func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath) as! Custom_Cell;



   cell.ButtonA.tag = indexPath.row;
   cell.ButtonB.tag = indexPath.row;
   cell.ButtonA.tag = indexPath.row;

    //Add Action Methods to UIButtons
     cell.ButtonA.addTarget(self, action: #selector(ButtonAAction), for: .touchUpInside)
    cell.ButtonB.addTarget(self, action: #selector(ButtonBAction), for: .touchUpInside)
    cell.ButtonA.addTarget(self, action: #selector(ButtonCAction), for: .touchUpInside)

   return cell;
}

按钮操作看起来像..

func ButtonAAction(_ sender: Any)  {
   //Get Button cell position.
   let ButtonPosition = (sender as AnyObject).convert(CGPoint.zero, to: tableView)
   let indexPath = tableView.indexPathForRow(at: ButtonPosition)
   if indexPath != nil {


       print("Cell indexPath: \(indexPath?.row)")
    }
  }

如何从单个tableViewcell获取多个按钮？

3 个答案: