Tirer pour actualiser sur tableView

Question

Je veux tirer pour actualiser pour mon application de flux RSS nouvelles. J'utilise le contrôleur de navigation et le contrôleur de vue de table. Comment dois-je faire sur Table View Controller? Que devrions-nous ajouter? Mon code est ici.

class TableviewController: UITableViewController { 

var items : Array<Item> = [] 
var entries : Array<Entry> = [] 

override func viewDidLoad() { 
    super.viewDidLoad() 


    loadRSS() 
    loadAtom() 
} 

override func didReceiveMemoryWarning() { 
    super.didReceiveMemoryWarning() 
} 


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

override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell { 
    let cell = tableView.dequeueReusableCell(withIdentifier: "ItemCell", for: indexPath) 

    let item:Item = self.items[indexPath.row] 
    cell.textLabel?.text = item.title 
    cell.detailTextLabel?.text = self.pubDateStringFromDate(item.pubDate! as Date) 

    return cell 
} 

override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) { 

    let item = self.items[indexPath.row] 

    let url:URL = URL(string: item.link!)! 
    let safariViewController = SFSafariViewController(url: url, entersReaderIfAvailable: true) 
    present(safariViewController, animated: true, completion: nil) 
} 

func loadRSS() { 

    let feedUrlString:String = "websiteurl" 

    Alamofire.request(feedUrlString).response { response in 

     if let data = response.data, let _ = String(data: data, encoding: .utf8) { 

      TIFeedParser.parseRSS(xmlData: data as NSData, completionHandler: {(isSuccess, channel, error) -> Void in 

       if (isSuccess) { 
        self.items = channel!.items! 
        self.tableView.reloadData() 
       } 

       if (response.error != nil) { 
        print((response.error?.localizedDescription)! as String) 
       } 
      }) 
     } 
    } 

} 

func loadAtom() { 

    let feedUrlString:String = "websiteurl" 

    Alamofire.request(feedUrlString).response { response in 

     if let data = response.data, let _ = String(data: data, encoding: .utf8) { 

      TIFeedParser.parseAtom(xmlData: data as NSData, completionHandler: {(isSuccess, feed, error) -> Void in 

       if (isSuccess) { 
        self.entries = feed!.entries! 
        self.tableView.reloadData() 
       } 

       if (error != nil) { 
        print((error?.localizedDescription)! as String) 
       } 
      }) 
     } 
    } 
} 

func pubDateStringFromDate(_ pubDate:Date)->String { 
    let format = DateFormatter() 
    format.dateFormat = "yyyy/M/d HH:mm" 

    let pubDateString = format.string(from: pubDate) 
    return pubDateString 
} 
} 

Answer 1

Déclarez une refreshControl de propriété dans votre TableViewController comme

var refreshControl:UIRefreshControl? 

La dans viewDidLoad() fonction ajoutez le code suivant

refreshControl?.addTarget(self, action: #selector(loadRSS), for: .valueChanged) 
self.tableView.addSubview(refreshControl!) 

Mettez à jour votre fonction loadRSS() comme

func loadRSS() { 

    let feedUrlString:String = "websiteurl" 

    Alamofire.request(feedUrlString).response { response in 
self.refreshControl?.endRefreshing(
     if let data = response.data, let _ = String(data: data, encoding: .utf8) { 

      TIFeedParser.parseRSS(xmlData: data as NSData, completionHandler: {(isSuccess, channel, error) -> Void in 

       if (isSuccess) { 
        self.items = channel!.items! 
        self.tableView.reloadData() 
       } 

       if (response.error != nil) { 
        print((response.error?.localizedDescription)! as String) 
       } 
      }) 
     } 
    } 

} 

Answer 2

S'il vous plaît se référer au code suivant, comme je l'ai ajouté tirer pour rafraîchir le contrôle sur votre code.

class TableviewController: UITableViewController { 

    var items : Array<Item> = [] 
    var entries : Array<Entry> = [] 

    var pullToFrefreshNews:UIRefreshControl! 

    override func viewDidLoad() { 
     super.viewDidLoad() 

     loadRSS() 
     loadAtom() 

     self.addPulltoRefrehs() 
    } 

    func addPulltoRefrehs() { 
     self.pullToFrefreshNews = UIRefreshControl() 
     self.pullToFrefreshNews.addTarget(self, action: #selector(TableviewController.loadRSS), for: UIControlEvents.valueChanged) 
     self.newsTableVU.addSubview(pullToFrefreshNews) 
    } 


    override func didReceiveMemoryWarning() { 
     super.didReceiveMemoryWarning() 
    } 


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

    override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell { 
     let cell = tableView.dequeueReusableCell(withIdentifier: "ItemCell", for: indexPath) 

     let item:Item = self.items[indexPath.row] 
     cell.textLabel?.text = item.title 
     cell.detailTextLabel?.text = self.pubDateStringFromDate(item.pubDate! as Date) 

     return cell 
    } 

    override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) { 

     let item = self.items[indexPath.row] 

     let url:URL = URL(string: item.link!)! 
     let safariViewController = SFSafariViewController(url: url, entersReaderIfAvailable: true) 
     present(safariViewController, animated: true, completion: nil) 
    } 

    func loadRSS() { 

     let feedUrlString:String = "websiteurl" 

     Alamofire.request(feedUrlString).response { response in 

      if let data = response.data, let _ = String(data: data, encoding: .utf8) { 

       TIFeedParser.parseRSS(xmlData: data as NSData, completionHandler: {(isSuccess, channel, error) -> Void in 

        if (isSuccess) { 
         self.items = channel!.items! 
         self.tableView.reloadData() 
        } 

        if (response.error != nil) { 
         print((response.error?.localizedDescription)! as String) 
        } 
       }) 
      } 
     } 

    } 

    func loadAtom() { 

     let feedUrlString:String = "websiteurl" 

     Alamofire.request(feedUrlString).response { response in 

      if let data = response.data, let _ = String(data: data, encoding: .utf8) { 

       TIFeedParser.parseAtom(xmlData: data as NSData, completionHandler: {(isSuccess, feed, error) -> Void in 

        if (isSuccess) { 
         self.entries = feed!.entries! 
         self.tableView.reloadData() 
        } 

        if (error != nil) { 
         print((error?.localizedDescription)! as String) 
        } 
       }) 
      } 
     } 
    } 

    func pubDateStringFromDate(_ pubDate:Date)->String { 
     let format = DateFormatter() 
     format.dateFormat = "yyyy/M/d HH:mm" 

     let pubDateString = format.string(from: pubDate) 
     return pubDateString 
    } 
} 

Answer 3

1) Déclarer une propriété de type UIRefreshControl comme:

var refreshControl = UIRefreshControl() 

2) Dans viewDidLoad() méthode ajouter cette refreshControl à la vue de table:

self.refreshControl.addTarget(self, action: #selector(loadRSS), for: .valueChanged) 

    if #available(iOS 10, *){ 
     self.tableView.refreshControl = self.refreshControl 
    }else{ 
     self.tableView.addSubview(self.refreshControl) 
    }