downloaadXML.swift

downloaadXML.swift

    func downloaadXML(webAddress:String){
        if InternetOK() == true{
            if let url = URL(string: webAddress){
                let task = session.dataTask(with: url, completionHandler: {
                    (data, response, error) in
                if error != nil{
                    print(error!.localizedDescription)
                    DispatchQueue.main.async {
                        self.popAlert(withTitle: "Error", andMessage: error!.localizedDescription)
                    }
                    return
                }
                    if let okData = data{
                        //解析XML資料,要增加一個類別在另一個file檔案裡做解析
                        let parser = XMLParser(data: okData)
                        let rssParserDelegate = RSSParserDelegate()
                        parser.delegate = rssParserDelegate
                        if parser.parse() == true{
                            self.objects = rssParserDelegate.getResult()
                            DispatchQueue.main.async {
                                self.myTableView.reloadData()
                            }
                        }else{
                            print("parse fail")
                        }
                    }
                })
                task.resume()
                
                }
            }else{
                  popAlert(withTitle: "No internet", andMessage: "Please try again later!")
                }
    }
    func popAlert(withTitle title:String, andMessage message:String){
        let alert = UIAlertController(title: title, message: message, preferredStyle: .alert)
        alert.addAction(UIAlertAction(title: "OK", style: .default, handler: nil))
        present(alert, animated: true, completion: nil)
    }

        
        
    override func viewDidLoad(){
        super.viewDidLoad()
        myTableView.dataSource = self
        myTableView.delegate = self
        /*let news1 = NewsItem(title: "first news", link: "https://www.apple.com")
        let news2 = NewsItem(title: "second news", link: "https://www.nike.com")
        let news3 = NewsItem(title: "third news", link: "https://www.udemy.com")
        objects.append(news1)
        objects.append(news2)
        objects.append(news3)
        隱藏測試用假資料*/
        downloaadXML(webAddress: "https://www.cnet.com/rss/iphone-update/")
        }