在swift 4中单击单选按钮时如何获取表视图索引?

我正在做swift 4的项目。我创造了 radiobutton 上课 tableview cell 1.我想 cell index 什么时候点击哪个 radio button .请帮帮我。

编辑:我刚刚添加了我的全部代码。我无法解决我的问题。所有代码如下所示。我创建了一个单选按钮类,并给它一个单选按钮特性。当我尝试在下面的单元格视图中单击“获取索引”按钮时,我给出了“获取索引”按钮。dylib:以NSException error类型的未捕获异常终止。

import UIKit

class TVCIsGuvenligi: UITableViewCell {

lazy var radioButtonGroup: [RadioButton] = {
    return [
        btnRadioEvet,
        btnRadioHayir,
        ]
}()

@IBOutlet var lblSoru: UILabel!
@IBOutlet var lblSoruAyrinti: UILabel!
@IBOutlet var lblEvet: UILabel!
@IBOutlet var lblHayır: UILabel!

@IBOutlet var btnRadioEvet: RadioButton!
@IBAction func btnRadioEvet(_ sender: RadioButton)
{
    let indexPath = IndexPath.init(row: sender.tag, section: 0)
    updateRadioButton(sender)
    print("index \(indexPath)")
}

@IBOutlet var btnRadioHayir: RadioButton!
@IBAction func btnRadioHayir(_ sender: RadioButton)
{
    let indexPath = IndexPath.init(row: sender.tag, section: 0)
    updateRadioButton(sender)
    print("index \(indexPath)")
}

override func awakeFromNib() {
    super.awakeFromNib()


}

override func setSelected(_ selected: Bool, animated: Bool) {
    super.setSelected(selected, animated: animated)

    // Configure the view for the selected state
}

func updateRadioButton(_ sender: RadioButton){
    radioButtonGroup.forEach { $0.isSelected = false }
    sender.isSelected = !sender.isSelected

  }

 }


ViewController.swift

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {

    let cell = tableView.dequeueReusableCell(withIdentifier: "cellIs", for: indexPath) as! TVCIsGuvenligi

    cell.lblSoru.text = myTitle[indexPath.row]
    cell.lblSoruAyrinti.text = myTitle[indexPath.row]

    cell.btnRadioEvet.tag = (indexPath.row)
    cell.btnRadioEvet.addTarget(self, action: #selector(getter: cell.btnRadioEvet), for: UIControlEvents.touchUpInside)

    print("current cell tag \(cell.btnRadioEvet.tag)")

    return cell
   }

func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {

    //getting the index path of selected row
    let indexPath = tableView.indexPathForSelectedRow

    //getting the current cell from the index path
    let currentCell = tableView.cellForRow(at: indexPath!)! as! TVCIsGuvenligi

    //getting the text of that cell.
    let currentItem = currentCell.lblSoru.text

    print("current item \(currentItem)")
 }