Question

我正在尝试执行以下操作，但是当我将内容添加到表格时，它会崩溃。有这个错误：

＆＃39; NSInternalInconsistencyException＆＃39;，原因：＆＃39;无法使用标识符UtilityTableViewCell对单元格进行出列 - 必须为标识符注册一个nib或类，或者在故事板中连接原型单元格＆＃39;

import UIKit

class UtilityBillTableViewController: UITableViewController {

    var bills = [UtilityBill]()

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

    // MARK: - Table view data source

    override func numberOfSections(in tableView: UITableView) -> Int {
        // #warning Incomplete implementation, return the number of sections
        return 1
    }

    override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        // #warning Incomplete implementation, return the number of rows
        return bills.count
    }

    override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {

        let cellIdentifier = "UtilityTableViewCell"
        let cell = tableView.dequeueReusableCell(withIdentifier: cellIdentifier, for: indexPath) as! UtilityTableViewCell

        let bill = bills[indexPath.row]

        cell.billName.text = bill.billName
        cell.totalDue.text = bill.amountDue
        cell.totalDue.text = bill.dueDate


        return cell
    }

    // Override to support conditional editing of the table view.
    override func tableView(_ tableView: UITableView, canEditRowAt indexPath: IndexPath) -> Bool {
        // Return false if you do not want the specified item to be editable.
        return true
    }

    // Override to support editing the table view.
    override func tableView(_ tableView: UITableView, commit editingStyle: UITableViewCellEditingStyle, forRowAt indexPath: IndexPath) {
        if editingStyle == .delete {
            // Delete the row from the data source
            tableView.deleteRows(at: [indexPath], with: .fade)
        } else if editingStyle == .insert {
            // Create a new instance of the appropriate class, insert it into the array, and add a new row to the table view
        }    
    }

    // Override to support rearranging the table view.
    override func tableView(_ tableView: UITableView, moveRowAt fromIndexPath: IndexPath, to: IndexPath) {

    }

    // Override to support conditional rearranging of the table view.
    override func tableView(_ tableView: UITableView, canMoveRowAt indexPath: IndexPath) -> Bool {
        // Return false if you do not want the item to be re-orderable.
        return true
    }

    // MARK: - Navigation

    // In a storyboard-based application, you will often want to do a little preparation before navigation
    override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
        // Get the new view controller using segue.destinationViewController.
        // Pass the selected object to the new view controller.
    }
    @IBAction func unwindToBillList(sender: UIStoryboardSegue){
        if let sourceViewController = sender.source as? UtilitiesViewController, let bill = sourceViewController.bill {
            // Add a new meal item.

            let newIndexPath = NSIndexPath(row: bills.count, section: 0)
            bills.append(bill)
            tableView.insertRows(at: [newIndexPath as IndexPath], with: .bottom)
        }
    }
}

Answer 1

如果您已在故事板中定义了单元格，则必须在该故事板场景中的原型单元格中指定重用标识符;如果你正在使用NIB或自定义类，你必须注册它。

您应该在故事板的原型单元格中仔细检查单元格标识符的拼写。或者，如果使用NIB或以编程方式创建的单元格，请确保调用适当的寄存器方法。

＆＃39; NSInternalInconsistencyException＆＃39;，原因：＆＃39;无法使用标识符将单元格出列

1 个答案: