带有CoreData和SearchBar的BUG，Swift IOS

Question

我正在尝试解决错误，正在使用CoreData持久性和SearchBar过滤，但是我的代码始终保留最后一个项目，始终显示最后添加的项目，其中包含NSPredicate， 任何反馈。

谢谢

代码如下：

import UIKit
import CoreData

class ToDoeyViewController: UITableViewController {

    @IBOutlet weak var searchBar: UISearchBar!

    var itemArray = [Item]()
    var selectedCategory: Category? {
        didSet {
            loadItems()
        }
    }

    let context = (UIApplication.shared.delegate as! AppDelegate).persistentContainer.viewContext

    override func viewDidLoad() {
        super.viewDidLoad()

        print(FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first?.appendingPathComponent("Items.plist"))

        searchBar.delegate = self

    }


    //MARK - TableView DataSocurce Methods

    override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return itemArray.count

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

        let item = itemArray[indexPath.row]

        let cell = tableView.dequeueReusableCell(withIdentifier: "ToDoCell", for: indexPath)
        cell.textLabel!.text = item.title


        // Ternary operator ==>
        // value = condition1 ? valueIfTrue:ValueIfFalse
        cell.accessoryType = item.done == true ? .checkmark:.none



        return cell
    }

    //MARK: - TableView Delegate Methods

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

        // print(itemArray[indexPath.row])

        itemArray[indexPath.row].done = !itemArray[indexPath.row].done

        saveItems()

        tableView.deselectRow(at: indexPath, animated: true)


    }

    //MARK: - Add new items

    @IBAction func addButtonPressed(_ sender: UIBarButtonItem) {

        var textField = UITextField()

        let alert = UIAlertController(title: "Add new item", message: "", preferredStyle: .alert)
        let action = UIAlertAction(title: "Add Item", style: .default) { (action) in


            let newItem = Item(context: self.context)

            newItem.title = textField.text!
            newItem.done = false
            newItem.parentCategory = self.selectedCategory

            self.itemArray.append(newItem)
            self.saveItems()
        }

        alert.addTextField { (alertTextField) in
            alertTextField.placeholder = "Create a new Item"
            textField = alertTextField

        }
        alert.addAction(action)
        present(alert, animated: true, completion: nil)
    }

    // MARK: - Methods
    func saveItems() {

        do {
            try context.save()
        } catch {
            print("Error saving context \(error)")
        }
        tableView.reloadData()
    }

    func loadItems(with request: NSFetchRequest<Item> = Item.fetchRequest(), predicate: NSPredicate? = nil) {

        let categoryPredicate = NSPredicate(format: "parentCategory.name MATCHES %@", selectedCategory!.name!)

        if let additionalPredicate = predicate {
            request.predicate = NSCompoundPredicate(andPredicateWithSubpredicates: [categoryPredicate, additionalPredicate])
        } else {
            request.predicate = categoryPredicate
        }

        //        let compoundPredicate = NSCompoundPredicate(andPredicateWithSubpredicates:              [categoryPredicate, predicate])
        //
        //        request.predicate = compoundPredicate

        do {
            itemArray = try context.fetch(request)
        } catch  {
            print("Error fetching context \(error)")
        }
        tableView.reloadData()
    }

}

//MARK: - Search Bar Methods

extension ToDoeyViewController: UISearchBarDelegate {

    func searchBarSearchButtonClicked(_ searchBar: UISearchBar) {

        let request: NSFetchRequest<Item> = Item.fetchRequest()
        let predicate = NSPredicate(format: "title CONTAINS[cd] %@", searchBar.text!)

        request.sortDescriptors = [NSSortDescriptor(key: "title", ascending: true)]

        loadItems(with: request, predicate: predicate )

    }

    func searchBar(_ searchBar: UISearchBar, textDidChange searchText: String) {
        if searchBar.text?.count == 0 {
            loadItems()
            DispatchQueue.main.async {
                searchBar.resignFirstResponder()
            }
        }
    }

}