Swift 每次我在 tableView 中滚动时，被选中的单元格都被取消选中

Question

*嗨，我有一个问题，如果有人能指导我找到合适的解决方案，那就太棒了.... 我有一个 tableview，其中包含可以选择的列表项（如复选框）还有一个 textview，当我在那里写时，我不会在每次滚动时删除（为用户）文本。我的自定义单元格 class - >

class ReportIssueTableViewCell: UITableViewCell, ReusableView, NibLoadableView {
    
    //MARK: Properties
    @IBOutlet private weak var lblTitleIssue: UILabel!
    @IBOutlet private weak var imgCircleCheck: UIImageView!
    @IBOutlet private weak var textView: WSTextView!
    @IBOutlet private weak var stackView: UIStackView!
    @IBOutlet private weak var sepratorView: UIView!
    
    private var reportIssue: ReportIssue?
    private var textContent = ""
    private var lastIndex = false
    
    //MARK: Methods
    func setupDataForCell(isSelected: Bool, reportIssues: ReportIssue, lastIndex: Bool) {
        self.isSelected = isSelected
        self.reportIssue = reportIssues
        self.lastIndex = lastIndex
        updateUI()
    }
    
    override func prepareForReuse() {
        super.prepareForReuse()
        textView.text = textContent
        imgCircleCheck.image = nil
    }
    func updateUI() {
        guard let reportIssue = reportIssue else { return }
        lblTitleIssue.text = reportIssue.name
        updateImageUI()
        updateTextView()
        updateTitleUI()
    }
    
    func sepratorView(hide: Bool, lastIndex: Bool) {
        sepratorView.isHidden = (lastIndex && hide)
    }
    
    //MARK: Private Methods
    private func updateTitleUI() {
        let font = lblTitleIssue.font.pointSize
        lblTitleIssue.font = isSelected ? SharedFonts.latoBold.ofSize(font) : SharedFonts.latoRegular.ofSize(font)
    }
    
    private func updateImageUI() {
        imgCircleCheck.image = isSelected ? R.image.iconCircleCheckFull() : SharedAssets.iconsCircle()
    }
    
    private func updateTextView() {
        textView.isHidden = !(lastIndex && isSelected)
    }
    
}

还有我的视图控制器 class 和表视图委托和数据源...

extension ReportIssueViewController: UITableViewDelegate , UITableViewDataSource {

func tableView(_ tableView: UITableView, viewForFooterInSection section: Int) -> UIView? {
    if section == 0 {
        let footerView = UIView()
        footerView.backgroundColor = SharedColors.woodspoon_extra_light_gray()
        return footerView
    }else {
        return UIView()
    }
}

func tableView(_ tableView: UITableView, heightForFooterInSection section: Int) -> CGFloat {
    return 8
}

func tableView(_ tableView: UITableView, viewForHeaderInSection section: Int) -> UIView? {
    guard let name = viewModel.reportTopics?[section].name else { return nil }
    let header = SectionTitleHeaderView(textDescriptor: .init(text: name, appearance: .init(color: SharedColors.woodspoon_black(), font: SharedFonts.latoBlack.ofSize(18))))
    return header
}

func tableView(_ tableView: UITableView, heightForHeaderInSection section: Int) -> CGFloat {
    if #available(iOS 15.0, *) {
        tableView.sectionHeaderTopPadding = 0
    } else {
        //Fallback on earlier versions
    }
    return UITableView.automaticDimension
}

func numberOfSections(in tableView: UITableView) -> Int {
    return viewModel.reportTopics?.count ?? 0
}

func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    return viewModel.reportTopics?[section].reportIssues?.count ?? 0
}

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let cell: ReportIssueTableViewCell = tableView.dequeueReusableCell(for: indexPath)
    
    if let issue = viewModel.reportTopics?[indexPath.section].reportIssues?[indexPath.row] {
        let countIssues = viewModel.reportTopics?[indexPath.section].reportIssues?.count ?? 0
        let lastIssue = countIssues - 1 == indexPath.row
        let isSelected = tableView.indexPathsForSelectedRows?.contains(where: { [=12=].section == indexPath.section && [=12=].row == indexPath.row })
        //remove seperator from last cell in each section
        if isSelected == isSelected {
            cell.sepratorView(hide: true ,lastIndex: lastIssue)
        }
        cell.setupDataForCell(isSelected: isSelected ?? false, reportIssues: issue, lastIndex: lastIssue)
    }
    return cell
}

func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
    cellPressed(indexPath: indexPath)
    
}

func tableView(_ tableView: UITableView, didDeselectRowAt indexPath: IndexPath) {
    cellPressed(indexPath: indexPath)
}

private func cellPressed(indexPath: IndexPath) {
    guard let cell = tableView.cellForRow(at: indexPath) as? ReportIssueTableViewCell else { return }
    tableView.beginUpdates()
    cell.updateUI()
    tableView.endUpdates()
}*

Answer 1

我认为这是因为细胞的重复使用。

您的问题从这里开始：

 isSelected = tableView.indexPathsForSelectedRows?.contains(where: { 
      [=10=].section == indexPath.section && [=10=].row == indexPath.row 
 })

向用于填充单元格的模型添加一个 isSelected 值，并通过添加一个 return bool 值的 isSelected 函数从您的 viewModel 中获取它，并在 cellForRowAt IndexPath 中获取它。

像这样：

 func isSelected(by indexPath: IndexPath) { }

并记得在选择单元格时更新模型（通过 viewModel）。

Swift 每次我在 tableView 中滚动时，被选中的单元格都被取消选中

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