Swift 使用 Table 查看单元格数据传递技术的段控制

Question

我想将数据从一个 table 视图单元格传递到另一个 table 视图单元格。当用户单击添加按钮时，我想将那些 table 视图单元格值添加到另一个段控件。我在同一个视图控制器中有两个 table 视图和单元格。我正在跟随委托人实施它，但我遇到了一些问题。

1.我使用 isHide 方法根据段控制选择隐藏特定 table 视图，仍然显示两个 table 视图，尽管我想显示一个和两个段显示相同的数据。

这是代码。

@IBAction func selectSegment(_ sender: UISegmentedControl) {
        
       if sender.selectedSegmentIndex == 0{
           FavouriteTableView.isHidden = true
        setUpUI()
        presenter = MoviePresenter(view: self)
        presenter.getMovies()
           
        }
        
    }

2。当用户单击按钮但实际上不起作用时，我想将 table 视图单元格值添加到秒 table 视图单元格。这是两个 table 视图单元格的代码。

protocol CellSubclassDelegate: AnyObject {
    func buttonTapped(cell: MovieViewCell)
}

class MovieViewCell: UITableViewCell {
    
    weak var delegate:CellSubclassDelegate?
    
    static let identifier = "MovieViewCell"
    

    @IBOutlet weak var movieImage: UIImageView!
    @IBOutlet weak var movieTitle: UILabel!
    @IBOutlet weak var movieOverview: UILabel!
    @IBOutlet weak var someButton: UIButton!
    
    
    @IBAction func someButtonTapped(_ sender: UIButton) {
        self.delegate?.buttonTapped(cell: self)
    }
    
    
    
    override func prepareForReuse() {
        super.prepareForReuse()
        self.delegate = nil
    }
    
    func configureCell(title: String?, overview: String?, data: Data?) {
        
        movieTitle.text = title
        movieOverview.text = overview
        
        movieImage.image = nil
        if let imageData = data{
            movieImage.image = UIImage(data: imageData)
           //  movieImage.image = nil
        }
    }
    
}

第二个单元格的代码。

protocol CellDelegate: AnyObject {
    func AddFavourite(cell: FavouriteTableViewCell)
}

class FavouriteTableViewCell: UITableViewCell {
    
    weak var delegate:CellDelegate?

    @IBOutlet weak var FavouriteImage: UIImageView!
    
    @IBOutlet weak var FavouritemovieTitle: UILabel!
    
    @IBOutlet weak var FavouritemovieOverview: UILabel!
    
    @IBAction func NewMovie(_ sender: UIButton) {
        self.delegate?.AddFavourite(cell: self)
    }
    
}

Table 查看控制器代码实现..

class MovieViewController: UIViewController, UISearchBarDelegate {
    
    @IBOutlet weak var userName: UILabel!
    @IBOutlet weak var tableView: UITableView!
    @IBOutlet weak var searchBar: UISearchBar!
    @IBOutlet weak var FavouriteTableView: UITableView!
    @IBOutlet weak var segmentControl: UISegmentedControl!
    
    private var presenter: MoviePresenter!
    
    var finalname = ""
    
   var movieTitle = ""
    var movieOverview = ""
    var movieImage : UIImage?
    
    
    override func viewDidLoad() {
        super.viewDidLoad()

       userName.text = "Hello: " + finalname

       
    }
    private func setUpUI() {
        tableView.dataSource = self
        tableView.delegate = self
    }
    
    
   private func searchBarText() {
        searchBar.delegate = self
    }
    
    @IBAction func selectSegment(_ sender: UISegmentedControl) {
        
       if sender.selectedSegmentIndex == 0{
           FavouriteTableView.isHidden = true
        setUpUI()
        presenter = MoviePresenter(view: self)
        presenter.getMovies()
           
        }
        
    }

extension MovieViewController: MovieViewProtocol {
    
    func resfreshTableView() {
        tableView.reloadData()
    }
    
    func displayError(_ message: String) {
        let alert = UIAlertController(title: "Error", message: message, preferredStyle: .alert)
        let doneButton = UIAlertAction(title: "Done", style: .default, handler: nil)
        alert.addAction(doneButton)
        present(alert, animated: true, completion: nil)
    }
    
}

extension MovieViewController: UITableViewDataSource {
    
    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        presenter.rows
    }
    
    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        
        let cell = tableView.dequeueReusableCell(withIdentifier: MovieViewCell.identifier, for: indexPath) as! MovieViewCell
        
        let row = indexPath.row
        let title = presenter.getTitle(by: row)
        let overview = presenter.getOverview(by: row)
        let baseImageURL = presenter.getUrlImage(by: row)
        let data = presenter.getImageData(by: baseImageURL)
        cell.delegate = self
        cell.configureCell(title: title, overview: overview, data: data)
        return cell
        
    }
    

extension MovieViewController : CellSubclassDelegate{
    func buttonTapped(cell: MovieViewCell) {
        guard (self.tableView.indexPath(for: cell) != nil) else {return}
            let customViewController = storyboard?.instantiateViewController(withIdentifier: "MovieDeatilsViewController") as? MovieDeatilsViewController
        customViewController?.titlemovie = cell.movieTitle.text ?? ""
        customViewController?.imagemovie = cell.movieImage.image
        customViewController?.overview = cell.movieOverview.text ?? ""
        self.navigationController?.pushViewController(customViewController!, animated: true)
                    
                   
    }
}
extension MovieViewController :  CellDelegate{
    func AddFavourite(cell: FavouriteTableViewCell) {
        guard (self.tableView.indexPath(for: cell) != nil) else {return}
        
        movieTitle = cell.FavouritemovieTitle.text ?? ""
        movieOverview = cell.FavouritemovieOverview.text ?? ""
        movieImage =  cell.FavouriteImage.image
    }
    
    
    
}

此处为应用设计截图。

这是应用程序的屏幕截图。

Answer 1

在你的代码中，首先你需要最喜欢的电影的模型，而不是将它保存在全局存储中，就像这个：

struct Movie {
    let title: String
    let overview: String
    let image: UIImage?
}

将您的阵列模型添加到您的控制器中：

// append to this array when user taped on favorite button
var favorites = [Movie]()

在 tableViewDelegate 中将每个 tableView 分开（这种情况下最好只使用一个 tableView）：

func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
      if tableView == FavoriteTableView {
        return favorites.count
      } else {
        return presenter.rows
      }
 }

    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        if tableView == FavoriteTableView {
            let cell = tableView.dequeueReusableCell(withIdentifier: FavouriteTableViewCell, for: indexPath) as! FavouriteTableViewCell
            cell.delegate = self // This cause favorite protocol method trigered
            return cell
        } else {
            let cell = tableView.dequeueReusableCell(withIdentifier: MovieViewCell.identifier, for: indexPath) as! MovieViewCell
            let row = indexPath.row
            let title = presenter.getTitle(by: row)
            let overview = presenter.getOverview(by: row)
            let baseImageURL = presenter.getUrlImage(by: row)
            let data = presenter.getImageData(by: baseImageURL)
            cell.delegate = self
            cell.configureCell(title: title, overview: overview, data: data)
            return cell
        }
    }

并在需要时像这样更新其他委托方法。

Swift 使用 Table 查看单元格数据传递技术的段控制

Swift Segment control with Table View Cell Data Passing techniques

delegates

uitableview

uisegmentedcontrol

ios

swift