ios - 重用 UITableViewCell 时我的数据不会保留 - SWIFT 3

Question

当我向下滚动 TableView 时遇到一些困难，单元格中的数据正在消失。如何在我的数据源中保留它们以使其更加具体？

提及我的单元格内部有一个 Collection View ，并且其中的项目显示错误。

class PromoTowerCollectionViewCell: UICollectionViewCell {


@IBOutlet weak var multiplierNumberLabel: UILabel!
@IBOutlet weak var iconPromo: UIImageView!
@IBOutlet weak var namePromoLabel: UILabel!
@IBOutlet weak var priceCutLabel: UILabel!
@IBOutlet weak var priceActualLabel: UILabel!
@IBOutlet weak var infoPopUp: MyButton!

    // MARK: - Setters
var kid : PromoPackageKid? {
    didSet {
        self.namePromoLabel.text = kid?.name
        self.multiplierNumberLabel.text = kid?.power
        self.priceActualLabel.text = String(describing: kid!.prices[Constants.CARD_PAYMENT]!) + " €"
        self.infoPopUp.promoText = kid?.texts
        if kid?.prices[Constants.CARD_PAYMENT] != kid?.commonPrices[Constants.CARD_PAYMENT] {
            let stringPrice = String(describing:kid!.commonPrices[Constants.CARD_PAYMENT]!) + " €"
            let attributeString = NSMutableAttributedString(string: stringPrice)
            attributeString.addAttribute(NSStrikethroughStyleAttributeName, value: 1, range: NSMakeRange(0, attributeString.length))
            self.priceCutLabel.attributedText = attributeString
        } else {
            self.priceCutLabel.isHidden = true
        }

    }
}

这将是我的 collectionViewItem 以及我填充的数据。

class PromoTowerTableViewCell: UITableViewCell {

var package : PromoPackage? {
    didSet {
        collectionView.reloadData()
    }
}

        @IBOutlet weak var collectionView: PromoTowerCollectionView!

    // MARK: - Lifecycle
    override func awakeFromNib() {
        super.awakeFromNib()
        // Initialization code
        collectionView.dataSource = self
        collectionView.delegate = self
        collectionView.register(UINib(nibName: "PromoTowerCollectionCell", bundle: nil), forCellWithReuseIdentifier: "PromoTowerCollectionViewCell")

        collectionView.reloadData()
    }

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

    }
}

// MARK: DataSource
extension PromoTowerTableViewCell: UICollectionViewDataSource {
    func numberOfSections(in collectionView: UICollectionView) -> Int {
        return 1
    }

    func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {

        return package?.kids.count ?? 0
    }

    func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
        let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "PromoTowerCollectionViewCell", for: indexPath) as! PromoTowerCollectionViewCell
        cell.kid = package?.kids[indexPath.row]
        cell.iconPromo.image = UIImage(named: iconImages[indexPath.row])
        return cell
    }
}

        //MARK: Delegate

    extension PromoTowerTableViewCell: UICollectionViewDelegate {

    func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
        if let cell = collectionView.cellForItem(at: indexPath) as? PromoTowerCollectionViewCell {
            cell.layer.borderWidth = 2.0
            cell.layer.borderColor = Theme.defaultColor().cgColor
            cell.layer.shadowOffset = CGSize.init(width: 0.5, height: 0.5)
        }
    }

至于我的MainTableView =>

     // MARK: - UITableViewDataSource + Delegate
    func expandableCell(forSection section: Int, inTableView tableView: ExpyTableView) -> UITableViewCell {
        let currentPackage = self.packages[section]
        if section < self.packages.count {
        if currentPackage.type == "bundle"{
                let cell = tableView.dequeueReusableCell(withIdentifier: "PromoTowerCell") as! PromoTowerTableViewCell
                cell.package = currentPackage
                return cell
            } 

Answer 1

Datasource 和 Delegate 应位于包含 collectionView 的 ViewController 中，单元格应仅包含您的 UIViews >，您正在单元格本身中设置单元格内容，tableView或collectionView将重新加载单元格，并且您将丢失数据，而您应该在cellForRowAtIndexpath，您所遵循的方法确实很奇怪。

arrayOne = ["Item 1", "Item 2", "Item 3"]
arrayTwo = ["Item A", "Item B", "Item C"]

// MARK: Delegate & DataSource
func numberOfSections(in collectionView: UICollectionView) -> Int {
    return 1
}

func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
    return arrayOne.count
}

func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
    let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "PromoTowerCollectionViewCell", for: indexPath) as! PromoTowerCollectionViewCell

       cell.iconPromo.text = arrayOne[indexPath.row]
       cell.namePromoLabel.text = arrayTwo[indexPath.row]

    return cell
}