Daily App part1

動機：製作一個每日都會出現不一樣的資訊APP，包含有新聞、天氣、地圖找餐廳以及登入

登入已經實現了，但其實還在思考這APP 會需要用到登入嗎？但沒關係就當作練習把它串再一起。

新聞API

News API - Search News and Blog Articles on the Web

寫一個 class

class GetArticles {
    static let share = GetArticles()
    
    func getArt(completion: @escaping(Result<[Articles], Error>) -> Void){
        let urlString = "https://newsapi.org/v2/top-headlines?country=us&apiKey=ad5c5f7946134e9a98087eba7ccaf28a"
        
        guard let url = URL(string: urlString) else {return}
        URLSession.shared.dataTask(with: url) { data, response, error in
            if let data = data{
                do{
                    let articServer = try JSONDecoder().decode(News.self, from: data)
                    print(articServer.articles.count)
                    completion(.success(articServer.articles))
                }catch{
                    completion(.failure(error))
                    print(error)
                }
                
                }
            }.resume()
        }
    }

建立一個 TableView，把抓到的 API 資料放進 TableViewCell 裡面，點擊 TableView會轉到一個 SFSafariViewController

class NewsTableViewController: UITableViewController {

    var articles = [Articles]()
    
    override func viewDidLoad() {
        super.viewDidLoad()

        GetArticles.share.getArt { result in
            switch result {
            case .success(let art):
                self.articles = art
                DispatchQueue.main.async {
                    self.tableView.reloadData()
                }
            case .failure(let error):
                    print(error)
            }

        }
    }

    // MARK: - Table view data source

    override func numberOfSections(in tableView: UITableView) -> Int {
        // #warning Incomplete implementation, return the number of sections
        return 1
    }

    override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        // #warning Incomplete implementation, return the number of rows
        return articles.count
    }

    
    override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCell(withIdentifier: "\(NewsTableViewCell.self)", for: indexPath) as! NewsTableViewCell
        let result = articles[indexPath.row]
        cell.InnerLabel.text = result.title
        cell.NewsImage.image = UIImage(systemName: "photo")
        if let imageURL = result.urlToImage {
            URLSession.shared.dataTask(with: imageURL) { data, response, error in
                if let data = data, let image = UIImage(data: data) {
                    DispatchQueue.main.async {
                        cell.NewsImage.image = image
                    }
                }
            }.resume()
        }
        
        return cell
    }
    
    override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
        guard let url = URL(string: articles[indexPath.row].url) else {return}
        let vc = SFSafariViewController(url: url)
        present(vc, animated: true)
    }

作品：