UITableViewCell中未显示UIImage

我在iOS应用程序中添加了一些UIImage,并希望在自定义UITableViewCell中显示它们。将有不同的图像取决于所选的轨道。所以在我的模型中,我创建了下面的代码,这是一个switch语句。

class GrandPrix {
let grandPrix: String!
let firstDriver: String!
let secondDriver: String!
let thirdDriver: String!
var trackIconName = ""

init(grandPrix: String, firstDriver: String, secondDriver: String, thirdDriver: String){
    self.grandPrix = grandPrix
    self.firstDriver = firstDriver
    self.secondDriver = secondDriver
    self.thirdDriver = thirdDriver
}

func updateTrackicon(grandPrix: String) -> String {
    switch (grandPrix) {
    case "Australian GP":
        return "Australian"
    case "Bahrain GP":
        return "Bahrain"
    case "Chinese GP":
        return "Chinese"
    case "Azerbaijan GP":
        return "Azerbaijan"
    case "Spanish GP":
        return "Chinese"
    case "Monaco GP":
        return "Monaco"
    case "Canadian GP":
        return "Canadian"
    case "French GP":
        return "French"
    case "Austrian GP":
        return "Austrian"
    case "British GP":
        return "British"
    case "German GP":
        return "German"
    case "Hungarian GP":
        return "Hungarian"
    case "Belgian GP":
        return "Belgian"
    case "Italian GP":
        return "Italian"
    case "Singapore GP":
        return "Singapore"
    case "Russian GP":
        return "Russian"
    case "Japanese GP":
        return "Japanese"
    case "American GP":
        return "United States"
    case "Brazilian GP":
        return "Brazilian"
    case "Abu Dhabi GP":
        return "Abu Dhabi"
    default :
        return "no track"
    }
   }
 }

现在在我的UITableViewClass中,我包含了以下代码,这些代码将在单元格中显示UIImage

override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
 let cell = tableView.dequeueReusableCell(withIdentifier: "cell") as! GrandPrixTableViewCell
    let race = self.grandPrix[indexPath.row]
    // Configure the cell...
    cell.grandPrix.text = race.grandPrix
    cell.firstPostion.text = race.firstDriver
    cell.secondPosition.text = race.secondDriver
    cell.thirdPostion.text = race.thirdDriver
    cell.trackImage.image = UIImage(named: race.updateTrackicon(grandPrix: race.grandPrix))

    return cell
}

我已经连接了单元格,并检查了UIImages的大小是否在故事板中UIImages的大小之内。当我运行应用程序的文本显示,但不是图像。任何帮助都将不胜感激。

下面的代码解释了数组的来源。

import UIKit

class PredictorTableViewController: UITableViewController {

var predictorTrack = ""
var firstDriver = ""
var secondDriver = ""
var thirdDriver = ""

var grandPrix = [GrandPrix]() { didSet {self.tableView.reloadData()} }

我想了想,试图改变现状 cellForRowAt indexPath 以下代码。

override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
 let cell = tableView.dequeueReusableCell(withIdentifier: "cell") as! GrandPrixTableViewCell
    let race = self.grandPrix[indexPath.row]
    // Configure the cell...
    cell.grandPrix.text = race.grandPrix
    cell.firstPostion.text = race.firstDriver
    cell.secondPosition.text = race.secondDriver
    cell.thirdPostion.text = race.thirdDriver
    race.trackIconName = race.updateTrackicon(grandPrix: race.grandPrix)
    cell.trackImage.image = UIImage(named: race.trackIconName)

    return cell
}

我以为这会显示轨道UIImage,但不幸的是,我仍然没有得到一个图像。