UISwitch is not invoking the function when added with tableView cell-CodePudding

I have added a switch along with each cell in table view but the switch function is not get called. If I give the switch in the front page its displaying successfully. But in tableview cell its not working `

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath)
    cell.textLabel?.text = models[indexPath.row].Address
    cell.textLabel?.text = models[indexPath.row].Number
    cell.textLabel?.text = models[indexPath.row].Role
    cell.textLabel?.text = models[indexPath.row].Name
    
    //switch
    
    let mySwitch = UISwitch(frame: .zero)
    mySwitch.setOn(false, animated: true)
    mySwitch.tag = indexPath.row
    mySwitch.tintColor = UIColor.red
    mySwitch.onTintColor = UIColor.green
    mySwitch.addTarget(self, action: #selector(switchValueDidChange(_:)), for: .valueChanged)
    cell.accessoryView = mySwitch

    return cell
}

@IBAction func switchValueDidChange(_sender: UISwitch){

    if _sender .isOn{
        print("switch on")
        view.backgroundColor = UIColor.red         }
    else{
        view.backgroundColor = UIColor.systemPurple
    }
}
`

CodePudding user response：

The signature is wrong. There must be a space character between the underscore and sender. And if it's not a real IBAction replace @IBAction with @objc

@objc func switchValueDidChange(_ sender: UISwitch) {
    if sender.isOn {...

and – not related to the issue – the selector can be simply written

#selector(switchValueDidChange)