Datensuche von Web-Service wird nicht korrekt in Label angezeigt

Question

Ich habe zwei Aufrufe, die an Web-Services, die ich versuche, in einem Etikett auf einer sekundären Ansicht angezeigt werden sollen.

Erste-Lookup oder Anruf erfolgt während der Last des Haupt-View-Controller wie folgt:

override func viewDidLoad() { 
    super.viewDidLoad() 
getAddress() 
} 

func getAddress() { 
    let URL_GET_ADDR:String = "http://www.webserver.com/apps/getmailingaddr.php" 
    let requestURL = NSURL(string: URL_GET_ADDR) 
    let request = NSMutableURLRequest(url: requestURL! as URL) 
    request.httpMethod = "POST" 
    let task = URLSession.shared.dataTask(with: request as URLRequest){ 
     data, response, error in 
     //exiting if there is some error 
     if error != nil{ 
      print("error is \(error)") 
      return; 
     } 
     //parsing the response 
     do { 
      //converting resonse to NSDictionary 
      //var teamJSON: NSDictionary! 
      self.teamJSON = try JSONSerialization.jsonObject(with: data!, options: .mutableContainers) as? NSDictionary 

      //getting the JSON array teams from the response 
      let address: NSArray = self.teamJSON["mailing"] as! NSArray 

      //looping through all the json objects in the array teams 
      for i in 0 ..< address.count{ 

       //getting the data at each index 
       let addrName:String = (address[i] as! NSDictionary)["name"] as! String! 
       let addrAddr1:String = (address[i] as! NSDictionary) ["address1"] as! String! 
       let addrAddr2:String = (address[i] as! NSDictionary)["address2"] as! String! 
       let addrCity:String = (address[i] as! NSDictionary)["city"] as! String! 
       let addrState:String = (address[i] as! NSDictionary)["state"] as! String! 
       let addrZipcode:Int = (address[i] as! NSDictionary)["zipcode"] as! Int! 
      } 

     } catch { 
      print(error) 
     } 
    } 
    task.resume() 
} 

ich diese Daten an die Kontakte mit den folgenden Modus Controller bin vorbei:

override func prepare(for segue: UIStoryboardSegue, sender: Any?) { 
    if let ContactsViewController = segue.destination as? ContactsViewController { 
    ContactsViewController.myAddress = teamJSON 
} 

Alles ist gut soweit. Jetzt in der Kontakte-View-Controller ich einen Nachschlag der Kontakte an Durchführung mit dem folgenden:

override func viewDidLoad() { 
    super.viewDidLoad() 
    myLabel = "" 
    // Do any additional setup after loading the view, typically from a nib. 
    contactsLabel.lineBreakMode = NSLineBreakMode.byWordWrapping 
    //created NSURL 
    let requestURL = NSURL(string: URL_GET_TEAMS) 
    //creating NSMutableURLRequest 
    let request = NSMutableURLRequest(url: requestURL! as URL) 
    //setting the method to post 
    request.httpMethod = "POST" 
    //creating a task to send the post request 
    let task = URLSession.shared.dataTask(with: request as URLRequest){ 
     data, response, error in 
     //exiting if there is some error 
     if error != nil{ 
      print("error is \(error)") 
      return; 
     } 
     //parsing the response 
     do { 
      //converting resonse to NSDictionary 
      var teamJSON: NSDictionary! 
      teamJSON = try JSONSerialization.jsonObject(with: data!, options: .mutableContainers) as? NSDictionary 
      //getting the JSON array teams from the response 
      let teams: NSArray = teamJSON["contacts"] as! NSArray 
      //looping through all the json objects in the array teams 
      for i in 0 ..< teams.count{ 
       //getting the data at each index 
       let teamId:String = (teams[i] as! NSDictionary)["title"] as! String! 
       let teamName:String = (teams[i] as! NSDictionary) ["name"] as! String! 
       //displaying the data 
       //print("id -> ", teamId) 
       //print("name -> ", teamName) 
       //print("===================") 
       //print("") 
       self.myLabel = self.myLabel + "<font size='5'><b>" + teamId + "</font>:</b> " + "<font size='5'>" + teamName + "</font><br /><br />" 
      } 
     } catch { 
      print(error) 
     } 
     DispatchQueue.main.async { 
      let attrStr = try! NSAttributedString(data: self.myLabel.data(using: String.Encoding.unicode,allowLossyConversion: true)!, options: [ NSDocumentTypeDocumentAttribute: NSHTMLTextDocumentType], documentAttributes: nil) 
      self.contactsLabel.attributedText = attrStr 
      self.contactsLabel.sizeToFit() 
     } 
    } 
    //executing the task 
    task.resume() 

    let attrStr = try! NSAttributedString(data: myLabel.data(using: String.Encoding.unicode,allowLossyConversion: true)!, options: [ NSDocumentTypeDocumentAttribute: NSHTMLTextDocumentType], documentAttributes: nil) 
    contactsLabel.attributedText = attrStr 
    contactsLabel.sizeToFit() 
    getAddress() 
} 

Der getAddress Funktionsaufruf hier nimmt die Daten, die weitergegeben wurden und fügt sich das Label:

func getAddress() { 
    //getting the JSON array teams from the response 
    let address: NSArray = myAddress["mailing"] as! NSArray 
    //looping through all the json objects in the array teams 
    for i in 0 ..< address.count{ 

     //getting the data at each index 
     let addrName:String = (address[i] as! NSDictionary)["name"] as! String! 
     let addrAddr1:String = (address[i] as! NSDictionary) ["address1"] as! String! 
     let addrAddr2:String = (address[i] as! NSDictionary)["address2"] as! String! 
     let addrCity:String = (address[i] as! NSDictionary)["city"] as! String! 
     let addrState:String = (address[i] as! NSDictionary)["state"] as! String! 
     let addrZipcode:Int = (address[i] as! NSDictionary)["zipcode"] as! Int! 

     let myCityStateZip : String = addrCity + ", " + addrState + " " + String(addrZipcode) 

     let myName : String = addrName + "<br />" + addrAddr1 + "<br />" + addrAddr2 

     let myDescription : String = "*All Correspondence for the Board/Assoc.<br /> should be directed to the following address:<br /><br />" 

     self.myLabel = self.myLabel + "<b><font size='5'>" + myDescription + "</font></b>" 
     self.myLabel = self.myLabel + "<font size='4'>" + myName + "</font>" 
     self.myLabel = self.myLabel + "<font size='4'>" + myCityStateZip + "</font>" 
     self.myLabel = self.myLabel + "<br /><br />" 

     let attrStr = try! NSAttributedString(data: myLabel.data(using: String.Encoding.unicode,allowLossyConversion: true)!, options: [ NSDocumentTypeDocumentAttribute: NSHTMLTextDocumentType], documentAttributes: nil) 
     contactsLabel.attributedText = attrStr 
     contactsLabel.sizeToFit() 
    } 
} 

Hier ist das Problem, beim ersten Mal funktioniert einwandfrei zeigt die Daten korrekt und in der richtigen Reihenfolge. Wenn Sie wieder auf die Kontaktseite zurückkehren, wird die Adresse oben auf dem Etikett mit den folgenden Kontakten angezeigt. Ich kann nicht herausfinden, warum das passiert. Irgendwelche Ideen?

Answer 1

Ich würde beide Lookups zum Frontend bewegen (ViewDidLoad-Funktion des Hauptansicht-Controllers) und sie als Werte an den zweiten Controller übergeben. Auf diese Weise muss sich Ihr zweiter Controller nur darum kümmern, die Daten für die Anzeige zu formatieren.