azamsharp

 func loadArticles(callback :([Article] -> ())) {
        
        URLSession.shared.dataTask(with: url) { data, response, error in
            
            if let data = data {
                
                let json = try! JSONSerialization.jsonObject(with: data, options: [])
                let dictionary = json as! JSONDictionary
                
                let articleDictionaries = dictionary["articles"] as! [JSONDictionary]

azamsharp

    func loadArticles(callback :([Article] -> ())) {
        
        URLSession.shared.dataTask(with: url) { data, response, error in
            
            if let data = data {
                
                let json = try! JSONSerialization.jsonObject(with: data, options: [])
                let dictionary = json as! JSONDictionary
                
                let articleDictionaries = dictionary["articles"] as! [JSONDictionary]

azamsharp

struct ArticleListViewModel {
    
    var title :String? = "Articles"
    var articles :[ArticleViewModel] = [ArticleViewModel]()
}

extension ArticleListViewModel {
    
    init(articles :[ArticleViewModel]) {
        self.articles = articles

azamsharp

    private func loadArticles() {
        
        // this url should be part of the URL builder scheme and not right inside the
        // view controller but right now we are focused on MVVM
        let url = URL(string: "https://newsapi.org/v1/articles?source=the-next-web&sortBy=latest&apiKey=0cf790498275413a9247f8b94b3843fd")!
        
        // this web service should use generic types. Again this is not part of the implementation
        // as we are focusing on MVVM model
        Webservice().getArticles(url: url) { articles in
            print(articles)

azamsharp

 private var viewModel :ArticleListViewModel = ArticleListViewModel()  {
        
        didSet {
            self.tableView.reloadData()
        }
    }

azamsharp

struct ArticleListViewModel {
    
    var title :String? = "Articles"
    var articles :[ArticleViewModel] = [ArticleViewModel]()
}

extension ArticleListViewModel {
    
    init(articles :[ArticleViewModel]) {
        self.articles = articles

azamsharp

struct ArticleViewModel {
    
    var title :String
    var description :String
}

extension ArticleViewModel {
    
    init(article :Article) {
        self.title = article.title

azamsharp

self.viewModel.title = self.titleTextField.text!
        self.viewModel.description = self.descriptionTextField.text!

azamsharp

import Foundation

class Dynamic<T> {
    
    var bind :(T) -> () = { _ in }
    
    var value :T? {
        didSet {
            bind(value!)
        }

azamsharp

class AddArticleViewController : UIViewController {
    
    // For this example assume they are UITextField
    @IBOutlet weak var titleTextField :BindingTextField!
    @IBOutlet weak var descriptionTextField :BindingTextField!
    
    var viewModel :AddArticleViewModel! {
       
        didSet {
            viewModel.title.bind = { [unowned self] in self.titleTextField.text = $0 }