'NSInternalInconsistencyException'，原因：'無法使用標識符出列單元格

Question

我試圖執行以下操作，但是當我將內容添加到表中時，它會崩潰。與此錯誤：

「NSInternalInconsistencyException」，原因：「無法出列具有標識符UtilityTableViewCell細胞 - 必須註冊標識符的筆尖或一類或連接在一個情節串連圖板的原型細胞」

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義單元格，則必須在該故事板場景中的原型單元格中指定該重用標識符;如果您使用的是NIB或自定義類，則必須註冊它。

您應該仔細檢查故事板原型單元格中您的單元格標識符的拼寫。或者如果使用NIB或以編程方式創建的單元格，請確保調用適當的註冊方法。