我如何在 tableView

如何解决我如何在 tableView

`你好！ 我有一个 tableview 和 2 个数组。

当我在选项卡之间切换时，tableview 会重新加载。在第一个选项卡中，我单击收藏夹，更改颜色并将数据添加到另一个数组。切换到第二个选项卡时，颜色不会改变。我该如何实施？

我的细胞

protocol CellSubclassDelegate: class {
   func gestureTapped(cell: StocksCell)
}

class StocksCell: UITableViewCell {

@IBOutlet weak var logoImageView: UIImageView!
@IBOutlet weak var tickerLabel: UILabel!
@IBOutlet weak var favouriteImageView: UIImageView!{ didSet {
    let panGesture = UITapGestureRecognizer(target: self,action: #selector(tapToAddFavourite))
    favouriteImageView.addGestureRecognizer(panGesture)
    favouriteImageView.isUserInteractionEnabled = true
    }
}
@IBOutlet weak var companyNameLabel: UILabel!
@IBOutlet weak var priceLabel: UILabel!
@IBOutlet weak var deltaLabel: UILabel!

var selectedCell = false
weak var delegate: CellSubclassDelegate?

override func awakeFromNib() {
    super.awakeFromNib()
}

@objc private func tapToAddFavourite(_ recognizer: UITapGestureRecognizer) {
    guard recognizer.state == .ended else { return }
    if selectedCell{
        favouriteImageView.tintColor = UIColor.lightGray
        selectedCell = false
    }else{
        favouriteImageView.tintColor = UIColor.yellow
        selectedCell = true
    }
    self.delegate?.gestureTapped(cell: self)
}
}

我的控制器

class StocksViewController: UIViewController,CellSubclassDelegate {

@IBOutlet weak var tableView: UITableView!
@IBOutlet weak var stocksLabel: UILabel! { didSet {
    let tapGestureStocks = UITapGestureRecognizer(target: self,action: #selector(tapToStocks))
    stocksLabel.addGestureRecognizer(tapGestureStocks)
    stocksLabel.isUserInteractionEnabled = true
    }
}
@IBOutlet weak var favouriteLabel: UILabel!{ didSet {
    let tapGestureFavourite = UITapGestureRecognizer(target: self,action: #selector(tapToFavourite))
    favouriteLabel.addGestureRecognizer(tapGestureFavourite)
    favouriteLabel.isUserInteractionEnabled = true
    }
}

fileprivate var stocksData = [StocksModel(n: "VNDX",f: "Vandex,LLC",t: "4 764,6 ₽",tt: "+55 ₽ (1,15%)"),StocksModel(n: "DDD",f: "Dandex,t: "1 764,tt: "+155 ₽ (1,15%)")]

var favouriteData = [StocksModel]()

let privateIdentifire = "StocksCell"
var isstocksSelected = true

override func viewDidLoad() {
    super.viewDidLoad()
    tableView.delegate = self
    tableView.dataSource = self
}

@objc private func tapToFavourite(_ recognizer: UITapGestureRecognizer) {
    guard recognizer.state == .ended else { return }
    favouriteLabel.alpha = 1
    favouriteLabel.font = favouriteLabel.font.withSize(28)
    stocksLabel.alpha = 0.65
    stocksLabel.font = stocksLabel.font.withSize(18)
    stocksLabel.textAlignment = .center
    isstocksSelected = false
    tableView.reloadData()
}
@objc private func tapToStocks(_ recognizer: UITapGestureRecognizer) {
    guard recognizer.state == .ended else { return }
    favouriteLabel.alpha = 0.65
    favouriteLabel.font = favouriteLabel.font.withSize(18)
    stocksLabel.alpha = 1
    stocksLabel.font = stocksLabel.font.withSize(28)
    stocksLabel.textAlignment = .left
    isstocksSelected = true
    tableView.reloadData()
}
}

表格数据源

extension StocksViewController: UITableViewDataSource{
    func tableView(_ tableView: UITableView,numberOfRowsInSection section: Int) -> Int {
        let result = isstocksSelected ? stocksData.count : favouriteData.count
        return result
    }

func tableView(_ tableView: UITableView,cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let cell = tableView.dequeueReusableCell(withIdentifier: privateIdentifire,for: indexPath) as! StocksCell
    cell.delegate = self
    
    if isstocksSelected{
        cell.tickerLabel.text = stocksData[indexPath.row].name
        cell.companyNameLabel.text = stocksData[indexPath.row].fullname
        cell.priceLabel.text = stocksData[indexPath.row].ticker
        cell.deltaLabel.text = stocksData[indexPath.row].tq
    }else{
        cell.tickerLabel.text = favouriteData[indexPath.row].name
        cell.companyNameLabel.text = favouriteData[indexPath.row].fullname
        cell.priceLabel.text = favouriteData[indexPath.row].ticker
        cell.deltaLabel.text = favouriteData[indexPath.row].tq
    }
    return cell
}

func gestureTapped(cell: StocksCell) {
    guard let indexPath = self.tableView.indexPath(for: cell) else {return}
    if cell.selectedCell{
        let dataStock = stocksData[indexPath.row]
        favouriteData.append(dataStock)
    }else{
        favouriteData.remove(at: indexPath.row)
    }
}
}

TABLEVIEW 委托

 extension StocksViewController: UITableViewDelegate {
    func tableView(_ tableView: UITableView,heightForRowAt indexPath: IndexPath) -> CGFloat {
        return 68
    }

 func tableView(_ tableView: UITableView,willdisplay cell: UITableViewCell,forRowAt indexPath: IndexPath) {
    cell.layer.cornerRadius = 16
 }
}

解决方法

在此处更改颜色：

func tableView(_ tableView: UITableView,cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let cell = tableView.dequeueReusableCell(withIdentifier: privateIdentifire,for: indexPath) as! StocksCell
    cell.delegate = self
    
    if isStocksSelected{
        favouriteImageView.tintColor = UIColor.lightGray
        cell.tickerLabel.text = stocksData[indexPath.row].name
        cell.companyNameLabel.text = stocksData[indexPath.row].fullname
        cell.priceLabel.text = stocksData[indexPath.row].ticker
        cell.deltaLabel.text = stocksData[indexPath.row].tq
    }else{
        favouriteImageView.tintColor = UIColor.yellow
        cell.tickerLabel.text = favouriteData[indexPath.row].name
        cell.companyNameLabel.text = favouriteData[indexPath.row].fullname
        cell.priceLabel.text = favouriteData[indexPath.row].ticker
        cell.deltaLabel.text = favouriteData[indexPath.row].tq
    }
    return cell
}