ViewController.swift

//
//  ViewController.swift
//  GettingStartedUITableView
//
//  Created by Sigit on 13/11/20.
//

import UIKit

class ViewController: UIViewController {
    
    // create property tableview
    private let tableView = UITableView()
    
    // STEP 3.1 Populating data
    private let data: [String] = ["First Data", "Second Data"]

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view.
        
        view.backgroundColor = .white
        
        // call function to setup view / tableview
        self.setupView()
    }
    
    private func setupView() {
        // STEP 3.2 conform the UITableViewDataSource
        tableView.dataSource = self
        
        tableView.register(UITableViewCell.self, forCellReuseIdentifier: "cellIdentifier")
        
        // add tableview to VC view
        view.addSubview(tableView)
        
        // setting up constrains
        tableView.translatesAutoresizingMaskIntoConstraints = false
        tableView.topAnchor.constraint(equalTo: view.topAnchor).isActive = true
        tableView.rightAnchor.constraint(equalTo: view.rightAnchor).isActive = true
        tableView.bottomAnchor.constraint(equalTo: view.bottomAnchor).isActive = true
        tableView.leftAnchor.constraint(equalTo: view.leftAnchor).isActive = true
    }

}

// STEP 3.3 comform to tableview datasource
extension ViewController: UITableViewDataSource {
    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return data.count
    }

    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCell(withIdentifier: "cellIdentifier", for: indexPath)
        cell.backgroundColor = UIColor.white
        cell.textLabel?.text = data[indexPath.row]
        return cell
    }
}