Swift 如何解决错误：引用成员'；indexPathForRow'；如果没有上下文类型，则无法解析

我尝试用tableview实现一个Longpress函数，它应该给我选择的行。 只是我遇到了一个我无法解决的错误

override func viewDidLoad() {
   super.viewDidLoad()
   let longPressRecognizer = UILongPressGestureRecognizer(target: self, action: #selector(FlightsViewController.longPress(longPressGestureRecognizer:)))
        self.view.addGestureRecognizer(longPressRecognizer)
}

@objc func longPress(longPressGestureRecognizer: UILongPressGestureRecognizer) {
        if longPressGestureRecognizer.state == UIGestureRecognizer.State.began {
            let touchPoint = longPressGestureRecognizer.location(in: self.view)
            if let indexPath =  tableView.indexPathForRow(at: touchPoint) {
                print(indexPath)
            }
        }
    }

这给了我一个错误：没有上下文类型，无法解析对成员“indexPathForRow”的引用

请帮忙。先谢谢你

这是表视图的声明

extension FlightsViewController: UITableViewDelegate,UITableViewDataSource {
    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return prefixArray.count
    }
    
    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCell(withIdentifier: "FlightsTableViewCell", for: indexPath) as! FlightsTableViewCell
        cell.lbDate.text = self.dateArray[indexPath.row]
        if UserDefaults.standard.string(forKey: "update") == "OK" {
            cell.lbMiles.text = String(self.milesArray[indexPath.row])
            if self.saciArray[indexPath.row] == true {
                cell.lbPrefix.textColor = UIColor.green
            } else {
                cell.lbPrefix.textColor = UIColor.white
            }
        }
        cell.lbPrefix.text = self.prefixArray[indexPath.row]
        cell.lbStart.text = self.startArray[indexPath.row]
        cell.lbStop.text = self.stopArray[indexPath.row]
        cell.lbTakeOff.text = self.takeOffArray[indexPath.row]
        cell.lbLanding.text = self.landingArray[indexPath.row]
        cell.lbFlighTime.text = "\(round(10 * Double(self.flightTimeArray[indexPath.row])!) / 10)"
        cell.lbEngineTime.text = "\(round(10 * Double(self.engineTimeArray[indexPath.row])!) / 10)"
        cell.lbOrigin.text = self.originArray[indexPath.row]
        cell.lbDestination.text = self.destinationArray[indexPath.row]
        cell.lbInformation.text = self.informationArray[indexPath.row]
        cell.lbPousos.text = self.pousosArray[indexPath.row]
        if self.rulesArray[indexPath.row] == 0 {
            cell.lbRules.text = "VFR" } else { cell.lbRules.text = "IFR"
        }
        if self.dayNightArray[indexPath.row] == 0 {
            cell.lbDayNight.text = messageDay } else { cell.lbDayNight.text = messageNight
        }
        if self.pilotCopilotArray[indexPath.row] == 0 {
            cell.lbPilotCopilot.text  = messagePilot } else { cell.lbPilotCopilot.text  = messageCoPilot
        }
        if self.engineArray[indexPath.row] == 0 {
            cell.lbEngine.text   = messageSingleEngine } else { cell.lbEngine.text   = messageTwinEngine
        }
        return cell
    }
    
    func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
        self.idEditFlight = idArray[indexPath.row]
        performSegue(withIdentifier: "editFlight", sender: self)
    }

    func tableView(_ tableView: UITableView, willDisplay cell: UITableViewCell, forRowAt indexPath: IndexPath) {
        if indexPath.row == (idArray.count - 1) {
            readFlights()
        }
    }

---

tableview如何声明或在何处声明？扩展FlightsViewController:UITableViewDelegate，UITableViewDataSource请查看为表视图声明添加的代码。谢谢你，不是这样，你在问题中随意添加了一个扩展名。在视图控制器的某个地方，您已经声明了

var tableView:Something

。错误是“我不知道tableView是什么类型的东西，告诉我它是什么”。在您告诉编译器该信息之前，您的错误将保持“您的意思是：@IBOutlet弱var tabelView:UITableView！