Swift开发：电影列表TableView不显示问题求助

我是Swift编程新手，目前开发iOS项目时遇到问题：在视图中用TableView展示电影列表，点击单元格跳转详情页，但运行后TableView没有任何内容。我先想让表格单元格正常显示，再排查后续问题。附上相关代码和终端错误信息，请求帮助。

ViewController代码 #

import UIKit

class ViewController: UIViewController,
UITableViewDelegate,
UITableViewDataSource  {

let movieList = ["Step Brothers", "Pulp Fiction", "Ali", "Harry Potter"]
let yearList = ["2008", "1994", "2001", "2001"]
let images = ["step_brothers", "pulp_fiction", "ali", "harry_potter3"]

override func viewDidLoad() {
    super.viewDidLoad()
    // Do any additional setup after loading the view.
}

func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    return movieList.count
}

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    
    let tempCell: TableViewCell = tableView.dequeueReusableCell(withIdentifier:         
             "cell") as! TableViewCell
    
    tempCell.movieTitleLabel.text = movieList[indexPath.row]
    tempCell.movieYearLabel.text = yearList[indexPath.row]
    tempCell.movieImage.image = UIImage(named: images[indexPath.row] + ".jpeg")
    
    return tempCell
}

func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
    
    let detailVC:MovieDetailViewController = self.storyboard?.instantiateViewController(withIdentifier: "MovieDetailViewController") as! MovieDetailViewController
    // assign the values to the local variable declared in ProductDetailViewController Class
    detailVC.movieImage = UIImage(named: images[indexPath.row] + ".jpeg")!
  
    // make it navigate to ProductDetailViewController
    self.navigationController?.pushViewController(detailVC, animated: true)
 }  
}

TableViewCell代码 #

import UIKit

class TableViewCell: UITableViewCell {

@IBOutlet weak var movieTitleLabel: UILabel!

@IBOutlet weak var movieYearLabel: UILabel!

@IBOutlet weak var movieImage: UIImageView!


override func awakeFromNib() {
    super.awakeFromNib()
    // Initialization code
}

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

    // Configure the view for the selected state
 }
}

MovieDetailViewController代码 #

class MovieDetailViewController: UIViewController {

    @IBOutlet weak var movieDetailImage: UIImageView!
    
    @IBOutlet weak var runtimeLabel: UILabel!
    
    @IBOutlet weak var yearDetailLabel: UILabel!
    
    @IBOutlet weak var directorDetailLabel: UILabel!
    
    var runtime: String!  // holds the product name
    var year: String!  // holds the price
    var movieImage: UIImage! // holds the product image
    var director: String!
    
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        movieDetailImage.image = movieImage
        runtimeLabel.text = runtime
        yearDetailLabel.text = year
        directorDetailLabel.text = director

        // Do any additional setup after loading the view.
    }
    /*
    // MARK: - Navigation

    // In a storyboard-based application, you will often want to do a little preparation before navigation
    override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
        // Get the new view controller using segue.destination.
        // Pass the selected object to the new view controller.
    }
    */
   }

终端错误信息 #

2022-11-14 17:39:28.232645-0500 Exercise01[25678:1217794] [Storyboard] Unable to find method -[(null) TableViewCell] 2022-11-14 17:39:28.259975-0500 Exercise01[25678:1217794] [Assert] UINavigationBar decoded as unlocked for UINavigationController, or navigationBar delegate set up incorrectly. Inconsistent configuration may cause problems. navigationController=<UINavigationController: 0x141012400>, navigationBar=<UINavigationBar: 0x142106160; frame = (0 47; 0 50); opaque = NO; autoresize = W; layer = <CALayer: 0x600001d72280>> delegate=0x141012400

排查解决步骤 #

1. 检查TableView的Delegate和DataSource关联 #

在Storyboard中选中TableView，打开右侧Connections Inspector，确认delegate和dataSource都连接到ViewController。代码中已实现协议，但未关联的话TableView不会调用相关方法。

2. 确认TableViewCell的Identifier匹配 #

在Storyboard中选中自定义Cell，检查右侧Attributes Inspector里的Identifier是否为cell，需和代码中dequeueReusableCell(withIdentifier: "cell")的字符串完全一致（大小写敏感）。

3. 修复自定义Cell的类关联 #

选中Storyboard中的TableViewCell，打开右侧Identity Inspector，确认Class设置为TableViewCell，且Module选择当前项目。终端的Unable to find method -[(null) TableViewCell]错误，大概率是Cell未正确关联自定义类导致。

4. 验证IBOutlet连接 #

检查TableViewCell中movieTitleLabel、movieYearLabel、movieImage三个IBOutlet是否正确连接到Storyboard对应控件：右键控件看连线是否指向Cell类的对应属性，或右键Cell类属性看连线是否指向控件，避免断连或错连。

5. 可选：纯代码场景补充Cell注册 #

如果是纯代码创建TableView，需在viewDidLoad中添加注册代码：

tableView.register(TableViewCell.self, forCellReuseIdentifier: "cell")

Storyboard拖拽的TableView无需此步骤。

完成以上操作后，TableView应能正常显示单元格内容，后续可再排查详情页的跳转和数据传递问题。

内容的提问来源于stack exchange，提问作者NewCoderBH1694