yzhong52

import UIKit
import RxSwift
import SafariServices
class ViewController: UIViewController {
    
    private let disposeBag = DisposeBag()
    private let client = NewsClient()
    
    private var articles: [Article] = []
    

yzhong52

// TODO: update the API key
private let apiKey: String = "c8707b3709a34bbe90837f63c71537ed"
private let path: String = "https://newsapi.org/v2/top-headlines?apiKey=\(apiKey)&country=us"

enum ClientError: Error {
    case missingResponseData
}

class NewsClient {
    func headlines() -> Single<ArticlesResponse> {

yzhong52

extension ViewController: UITableViewDelegate {
    func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
        let article = articles[indexPath.row]
        present(SFSafariViewController(url: article.url), animated: true, completion: nil)
    }
}

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extension ViewController: UITableViewDataSource {
    func numberOfSections(in tableView: UITableView) -> Int {
        return 1
    }

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

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

yzhong52

import UIKit
import Alamofire

class ImageManager {

    private let session = Alamofire.Session()
    
    static let shared = ImageManager()

    func load(url: URLConvertible, completionHandler: @escaping (UIImage) -> Void) -> Void {

yzhong52

extension ViewController: UITableViewDataSource {
    ...

    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let tableViewCell = tableView.dequeueReusableCell(withIdentifier: "Cell", for: indexPath) as! NewsTableViewCell

        let article = articles[indexPath.row]
        tableViewCell.titleLabel.text = article.title
        tableViewCell.contentLabel.text = article.content

yzhong52

import Foundation

enum LoadState<T> {
    case loading
    case updating
    case loaded(response: T)
    case failed(error: Error)
}

yzhong52

import Foundation
import RxSwift
import RxCocoa

class NewsManager {
    typealias NewsLoadState = LoadState<ArticlesResponse>

    enum LoadError: Error {
        case unknownError
    }

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class ViewController: UIViewController {

    private let manager = NewsManager()
    private let disposeBag = DisposeBag()

    private var articles: [Article] = []

    private let titleLabel: UILabel = {
        let label = UILabel()
        label.text = NSLocalizedString("News", comment: "")

yzhong52

import UIKit

class NewsTableViewCell: UITableViewCell {

    let titleLabel: UILabel = {
        let lable = UILabel()
        lable.translatesAutoresizingMaskIntoConstraints = false
        lable.numberOfLines = 3
        lable.font = UIFont.systemFont(ofSize: 14)
        return lable