Building a Client App From Scratch (ViewController with Client and TableView)

ViewController.swift

import UIKit
import RxSwift
import SafariServices
class ViewController: UIViewController {
    
    private let disposeBag = DisposeBag()
    private let client = NewsClient()
    
    private var articles: [Article] = []
    
    private let tableView: UITableView = {
        let tableView = UITableView()
        tableView.translatesAutoresizingMaskIntoConstraints = false
        tableView.tableFooterView = UIView()
        tableView.register(UITableViewCell.self, forCellReuseIdentifier: "Cell")
        tableView.rowHeight = UITableView.automaticDimension
        tableView.estimatedRowHeight = 134
        return tableView
    }()
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        view.addSubview(tableView)
        NSLayoutConstraint.activate([
            tableView.topAnchor.constraint(equalTo: view.topAnchor),
            tableView.bottomAnchor.constraint(equalTo: view.bottomAnchor),
            tableView.leftAnchor.constraint(equalTo: view.leftAnchor),
            tableView.rightAnchor.constraint(equalTo: view.rightAnchor),
        ])
        tableView.delegate = self
        tableView.dataSource = self
        
        client.headlines().subscribe(onSuccess: { [weak self] (response) in
            self?.articles = response.articles
            self?.tableView.reloadData()
            }, onError: { error in
                print("Received error \(error)")
            }).disposed(by: disposeBag)
    }
}