Created
September 13, 2023 21:26
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UIKit Search
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| import UIKit | |
| import CoreData | |
| class ViewController: UIViewController, UISearchResultsUpdating, UISearchBarDelegate { | |
| // Kendi delegate methodu UISearchBarDelegate | |
| func updateSearchResults(for searchController: UISearchController) { | |
| guard let searchText = searchController.searchBar.text else { | |
| return | |
| } | |
| if searchText.isEmpty { | |
| loadDataFromDataBase() | |
| } else { | |
| let fetchRequest: NSFetchRequest<Item> = Item.fetchRequest() | |
| let predicate = NSPredicate(format: "title CONTAINS[cd] %@", searchText) | |
| fetchRequest.predicate = predicate | |
| fetchRequest.sortDescriptors = [NSSortDescriptor(key: "title", ascending: true)] | |
| do { | |
| items = try context.fetch(fetchRequest) | |
| print("Filtered data is successful") | |
| } catch { | |
| print("Filtered data is not successful \(error)") | |
| } | |
| tableView.reloadData() | |
| } | |
| } | |
| @IBOutlet weak var tableView: UITableView! | |
| var items: [Item] = [] | |
| let context = (UIApplication.shared.delegate as! AppDelegate).persistentContainer.viewContext | |
| var searchController: UISearchController! | |
| override func viewDidLoad() { | |
| super.viewDidLoad() | |
| setupSearchController() | |
| tableView.dataSource = self | |
| tableView.delegate = self | |
| loadDataFromDataBase() | |
| } | |
| func setupSearchController() { | |
| // Mevcut goruntude arama sonucunu gostermek icin nil verdik burda | |
| searchController = UISearchController(searchResultsController: nil) | |
| searchController.searchBar.delegate = self | |
| navigationItem.searchController = searchController | |
| searchController.obscuresBackgroundDuringPresentation = false | |
| searchController.definesPresentationContext = true | |
| searchController.searchResultsUpdater = self | |
| } | |
| @IBAction func addButtonPressed(_ sender: UIBarButtonItem) { | |
| var text = UITextField() | |
| let alert = UIAlertController(title: "Add item", message: "", preferredStyle: .alert) | |
| let addButton = UIAlertAction(title: "Add Button", style: .default) { action in | |
| let newItem = Item(context: self.context) | |
| newItem.title = text.text | |
| newItem.isDone = false | |
| self.items.append(newItem) | |
| self.saveDataToDataBase() | |
| } | |
| alert.addTextField { textField in | |
| textField.placeholder = "Enter here" | |
| text = textField | |
| } | |
| alert.addAction(addButton) | |
| present(alert, animated: true) | |
| } | |
| } | |
| //MARK: - TableViewDataSource Functions | |
| extension ViewController: UITableViewDataSource { | |
| public func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int { | |
| return items.count | |
| } | |
| public func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell { | |
| let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath) | |
| let item = items[indexPath.row] | |
| cell.textLabel?.text = item.title | |
| cell.accessoryType = item.isDone ? .checkmark : .none | |
| return cell | |
| } | |
| } | |
| //MARK: - TableViewDelegate Functions | |
| extension ViewController: UITableViewDelegate { | |
| func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) { | |
| tableView.deselectRow(at: indexPath, animated: true) | |
| let item = items[indexPath.row] | |
| item.isDone = !item.isDone | |
| saveDataToDataBase() | |
| } | |
| } | |
| //MARK: - DataBase Functions | |
| extension ViewController { | |
| func saveDataToDataBase() { | |
| do { | |
| try context.save() | |
| print("Save data is successful") | |
| } catch { | |
| print("Error saving to database \(error)") | |
| } | |
| tableView.reloadData() | |
| } | |
| func loadDataFromDataBase() { | |
| let fetchRequest: NSFetchRequest<Item> = Item.fetchRequest() | |
| do { | |
| items = try context.fetch(fetchRequest) | |
| print("Load data is successful") | |
| } catch { | |
| print("Load data is not successful \(error)") | |
| } | |
| tableView.reloadData() | |
| } | |
| } | |
| //MARK: - SearchBarDelegate Functions | |
| //burdaki extension yerine searchdelegate icindeki update methoduna gecirdik |
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