'（of：ChecklistItem）'型の引数リストを持つ "index"を呼び出せません

Question

配列に項目を入れたときにXcodeがこのエラーを返し、ChecklistItemオブジェクトの変数を設定しています。私はエラーを返す行をコメントしました。あなたがEquatableプロトコルに準拠する必要が

import UIKit 

class ChecklistViewController: UITableViewController, AddItemViewControllerDelegate { 

    var items: [ChecklistItem] 

    required init?(coder aDecoder: NSCoder) { 
     items = [ChecklistItem]() 

     let row0item = ChecklistItem() 
     row0item.text = "Walk the dog" 
     row0item.checked = false 
     items.append(row0item) 

     let row1item = ChecklistItem() 
     row1item.text = "Brush my teeth" 
     row1item.checked = true 
     items.append(row1item) 

     let row2item = ChecklistItem() 
     row2item.text = "Learn iOS development" 
     row2item.checked = true 
     items.append(row2item) 

     let row3item = ChecklistItem() 
     row3item.text = "Soccer practice" 
     row3item.checked = false 
     items.append(row3item) 

     let row4item = ChecklistItem() 
     row4item.text = "Eat ice cream" 
     row4item.checked = true 
     items.append(row4item) 

     super.init(coder: aDecoder) 
    } 


    override func viewDidLoad() { 
     super.viewDidLoad() 
     // Do any additional setup after loading the view, typically from a nib. 
    } 


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

     return items.count 

    } 

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

     let cell = tableView.dequeueReusableCell(withIdentifier: "ChecklistItem", for: indexPath) 

     let item = items[indexPath.row] 

     let label = cell.viewWithTag(1000) as! UILabel 
     label.text = item.text 

     configureText(for: cell, with: item) 
     configureCheckmark(for: cell, with: item) 

     return cell 

    } 

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

     if let cell = tableView.cellForRow(at: indexPath) { 
      let item = items[indexPath.row] 
      item.toggleChecked() 
      item.checked = !item.checked 

      configureCheckmark(for: cell, with: item) 
     } 
     tableView.deselectRow(at:indexPath, animated: true) 
    } 

    override func tableView(_ tableView: UITableView, commit editingStyle: UITableViewCellEditingStyle, forRowAt indexPath: IndexPath) { 
     items.remove(at: indexPath.row) 

     let indexPaths = [indexPath] 
     tableView.deleteRows(at: indexPaths, with: .automatic) 
    } 

    func configureCheckmark(for cell: UITableViewCell, with item: ChecklistItem) { 

     let label = cell.viewWithTag(1001) as! UILabel 


     if item.checked { 
      label.text = "√" 
     } else { 
      label.text = " " 
     } 
    } 

    func configureText(for cell: UITableViewCell, with item: ChecklistItem) { 

     let label = cell.viewWithTag(1000) as! UILabel 
     label.text = item.text 

    } 

    func addItemViewControllerDidCancel(_ controller: AddItemViewController) { 
     dismiss(animated: true, completion: nil) 
    } 

    func addItemViewController(_ controller: AddItemViewController, didFinishAdding item: ChecklistItem) { 

     let newRowIndex = items.count 
     items.append(item) 

     let indexPath = IndexPath(row: newRowIndex, section: 0) 
     let indexPaths = [indexPath] 
     tableView.insertRows(at: indexPaths, with: .automatic) 

     dismiss(animated: true, completion: nil) 
    } 

    func addItemViewController(_ controller: AddItemViewController, didFinishEditing item: ChecklistItem) { 

     if let index = items.index(of: item) { // Cannot invoke "index" with an argument list of type'(of: ChecklistItem)' 
      let indexPath = IndexPath(row: index, section: 0) 
      if let cell = tableView.cellForRow(at: indexPath) { 
       configureText(for: cell, with: item) 
      } 
     } 
     dismiss(animated: true, completion: nil) 
    } 

    override func prepare(for segue: UIStoryboardSegue, sender: Any?) { 
     if segue.identifier == "AddItem" { 

      let navigationController = segue.destination as! UINavigationController 
      let controller = navigationController.topViewController as! AddItemViewController 

      controller.delegate = self 
     } else if segue.identifier == "EditItem" { 

      let navigationController = segue.destination as! UINavigationController 
      let controller = navigationController.topViewController as! AddItemViewController 

      controller.delegate = self 

      if let indexPath = tableView.indexPath(for: sender as! UITableViewCell) { 
       controller.itemToEdit = items[indexPath.row] 
      } 


     } 
    } 



} 

ChecklistItem.swift

輸入財団

class ChecklistItem { 
    var text = "" 
    var checked = false 

    func toggleChecked() { 
     checked = !checked 
    } 
} 

Answer 1

は... どれでも多分、事前にグーグル。