swift - 无效更新 : invalid number of rows in section 0, 更新后现有节中包含的行数

Question

当我滑动并删除 UITableCell 时，我不断收到此错误

Terminating app due to uncaught exception NSInternalInconsistencyException, reason: Invalid update: invalid number of rows in section 0. The number of rows contained in an existing section after the update (11) must be equal to the number of rows contained in that section before the update (11), plus or minus the number of rows inserted or deleted from that section (0 inserted, 1 deleted) and plus or minus the number of rows moved into or out of that section (0 moved in, 0 moved out).

func tableView(_ tableView: UITableView, trailingSwipeActionsConfigurationForRowAt indexPath: IndexPath) -> UISwipeActionsConfiguration? {
    let delete = deleteAction(at: indexPath)
    tableView.reloadData()
    print(listOfCoins)
    print(listOfCoins.count)
    return UISwipeActionsConfiguration(actions: [delete])
}

func deleteAction(at indexPath: IndexPath) -> UIContextualAction {
    let action = UIContextualAction(style: .destructive, title: "Delete") { (action, view, nil) in
        self.listOfCoins.remove(at: indexPath.row)
       self.tableView.deleteRows(at: [indexPath], with: .automatic)
        self.tableView.reloadData()
        }
    action.title = "Delete"
    action.backgroundColor = .red
    return action
}

我已经尝试删除允许应用程序运行的“self.tableView.deleteRows”并从我的源中删除 indexPath，但我不知道为什么当“tableView.reloadData()”时单元格不会消失' 之后被调用。

Answer 1

你只需要

self.listOfCoins.remove(at: indexPath.row)
self.tableView.deleteRows(at: [indexPath], with: .automatic)

所以删除这个

let delete = deleteAction(at: indexPath)
tableView.reloadData() // remove this line

和

self.tableView.deleteRows(at: [indexPath], with: .automatic)
self.tableView.reloadData() // remove this line

---

func tableView(_ tableView: UITableView, trailingSwipeActionsConfigurationForRowAt indexPath: IndexPath) -> UISwipeActionsConfiguration? {
    let delete = deleteAction(at: indexPath) 
    print(listOfCoins)
    print(listOfCoins.count)
    return UISwipeActionsConfiguration(actions: [delete])
}

func deleteAction(at indexPath: IndexPath) -> UIContextualAction {
    let action = UIContextualAction(style: .destructive, title: "Delete") { (action, view, nil) in
        self.listOfCoins.remove(at: indexPath.row)
        self.tableView.deleteRows(at: [indexPath], with: .automatic) 
    }
    action.title = "Delete"
    action.backgroundColor = .red
    return action
}