由于未捕获的异常而终止应用程序，原因：'attempt to delete row 3 from section 1 which only contains 0 rows before the update'

Question

我正在尝试重新加载我的 TableView，但出现此异常 "Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'attempt to delete row 3 from section 1 which only contains 0 rows before the update'"。

下面是我的代码：-

func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {

    if statusTableView == tableView {

        return ModelAssessStatus.sharedInstance.arrType.count
    } 

    else {
         if !sections[section].expanded {
            return 0
        }

         else {
            return sections[section].names.count
        }

        //return sections[section].names.count
        /*if sections[section].expanded == true {
            return sections[section].names.count
        }

        else {
            return 0
        }*/
    }
}. 

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        var expandableCategoryCell = tableView.dequeueReusableCell(withIdentifier: "ExpandableCategoryCell") as? ExpandableCategoryCell

        if expandableCategoryCell == nil {
            var nib:Array = Bundle.main.loadNibNamed("ExpandableCategoryCell", owner: self, options: nil)!
            expandableCategoryCell = nib[0] as? ExpandableCategoryCell
        }

        expandableCategoryCell?.selectionStyle = .none
        expandableCategoryCell?.labelName.text = sections[indexPath.section].names[indexPath.row]
        return expandableCategoryCell!

        //return UITableViewCell()

    }. 

func tableView(_ tableView: UITableView, heightForHeaderInSection section: Int) -> CGFloat {

    if tableView == self.expandableTableView {
        return 60
    }

    return 0
}

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

    if tableView == self.expandableTableView {
        return 0
    }

    return 0
}

func tableView(_ tableView: UITableView, viewForHeaderInSection section: Int) -> UIView? {

    if tableView == expandableTableView {

        let cell = self.expandableTableView.dequeueReusableHeaderFooterView(withIdentifier: "ExpandableHeaderView")
        let header = cell as! ExpandableHeaderView

        header.customInit(title: sections[section].categoryType, section: section, delegate: self, isSelected: sections[section].fullSelected)

        if sections[section].expanded {
            header.imgArrow?.image = UIImage(named : "down_Arow")//.transform = (header.imgArrow?.transform.rotated(by: CGFloat(Double.pi)))!
        }

        else {
            header.imgArrow?.image = UIImage(named : "error")
        }

        return cell
    }

    else {
        return UIView.init(frame: CGRect(x: 0, y: 0, width: 0, height: 0))
    }
}

//Height For Raw at indexPath
func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {

    if statusTableView == tableView {
        return 50
    }

    else {

        if (sections[indexPath.section].expanded) {
            return 60
        }

        else {
            return 0
        }
    }
  }
}


extension PeerCategoryStatusVC : expandableHeaderViewDelegate {
func toggleSections(header: ExpandableHeaderView, section: Int) {

    sections[section].expanded = !sections[section].expanded

    //expandableTableView.reloadData()
    expandableTableView.beginUpdates()

    for index in 0..<sections[section].names.count {
        expandableTableView.reloadRows(at: [IndexPath(row : index, section : section)], with: .automatic)
    }

    expandableTableView.endUpdates()

    //self.view.layoutIfNeeded()
  }
}.

此处开始更新并结束更新 TableView。我正在尝试重新加载 tableView 但不知道为什么会出现异常。

如果我将保留相同的行数，那么就会出现约束问题。

有什么要补充的吗？

Answer 1

我只是修复了同样的异常。主要是因为你调用 reloadRows(at: with:) 的 indexPath(s) 的 row 大于总行数。

由于未捕获的异常而终止应用程序，原因：'attempt to delete row 3 from section 1 which only contains 0 rows before the update'

Terminating app due to uncaught exception, reason: 'attempt to delete row 3 from section 1 which only contains 0 rows before the update'

height

tableview

ios

swift