ios coredata

ViewController.swift

//
//  ViewController.swift
//  HitList
//
//  Created by Andhika Yuana on 27/01/20.
//  Copyright © 2020 Andhika Yuana. All rights reserved.
//

import UIKit

class ViewController: UIViewController {
    
    //let ROW_IDENTIFIER = "Cell"

    @IBOutlet weak var tableView: UITableView!
    var names: [String] = []
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        title = "The List"
        tableView.register(
            UITableViewCell.self,
            forCellReuseIdentifier: "Cell"
        )
    }
    
    @IBAction func addName(_ sender: UIBarButtonItem) {
        
        let alert = UIAlertController(
            title: "New Name",
            message: "Add a new name",
            preferredStyle: .alert
        )
        
        let saveAction = UIAlertAction(
            title: "Save",
            style: .default
        ) {
            
            [unowned self] action in
            
            guard let textField = alert.textFields?.first,
                let nameToSave = textField.text else {
                    return
            }
            
            self.names.append(nameToSave)
            self.tableView.reloadData()
            
            print(self.names)
        }
        
        let cancelAction = UIAlertAction(
            title: "Cancel",
            style: .default
        )
        
        alert.addTextField()
        alert.addAction(saveAction)
        alert.addAction(cancelAction)
        
        present(alert, animated: true)
    }

}

//MARK: - UITableViewDataSource
   extension ViewController: UITableViewDataSource {
       
       func tableView(
            _ tableView: UITableView,
            numberOfRowsInSection section: Int
       ) -> Int {
           return names.count
       }
       
       func tableView(
            _ tableView: UITableView,
            cellForRowAt indexPath: IndexPath
       ) -> UITableViewCell {
           
           let cell = tableView.dequeueReusableCell(
                withIdentifier: "Cell",
                for: indexPath
            )
           cell.textLabel?.text = names[indexPath.row]
           return cell
       }
   }