nicht in der Lage, Daten zu erhalten.oder zweimal gleiche Daten in der Tabellenansicht

Question

Ich habe in der Tabellenansicht, die die Daten von einer URL angezeigt werden.Aber wenn ich zum ersten Mal öffnen.Ich sehe zwei Mal die gleichen Daten oder einige Zeit In meiner Tabellenansicht werden keine Daten angezeigt.

import UIKit 
import CoreLocation 

class ContainerViewController: UIViewController, CLLocationManagerDelegate, UITableViewDelegate, UITableViewDataSource { 





    // check the current view controller 
    weak var currentViewController: UIViewController? 

    // show the location 
    @IBOutlet weak var LocationLabel: UILabel! 

    var locationManager: CLLocationManager = CLLocationManager() 

    @IBOutlet var TypeLabel: UILabel! 

    @IBOutlet var TableViewList: UITableView! 



    var startLocation: CLLocation! 


    var NewCurrentLatitude: Double! 

    var NewCurrentLongitude: Double! 

    var BTdata = BTData?() 

    var BTypeId : String? 

    // array to store the value from json 
    var arrDict = [Businessdata]() 


    var selectedIndex:NSIndexPath? 

    override func viewDidLoad() { 


     super.viewDidLoad() 

     isSearching = false; 

     locationManager.delegate = self 

     locationManager.desiredAccuracy = kCLLocationAccuracyBest 

     locationManager.requestWhenInUseAuthorization() 



     startLocation = nil 


     // nib for custom cell (table view) 
     let nib = UINib(nibName:"customCell", bundle: nil) 
     TableViewList.registerNib(nib, forCellReuseIdentifier: "cell") 

     // LoadBusinesses() 
    } 

    override func viewDidAppear(animated: Bool) 
    { 
     self.TypeLabel.text = BTdata?.BTNames 
     self.BTypeId = BTdata?.BTIds 
     locationManager.startUpdatingLocation() 

    } 

    // current location 
    func locationManager(manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) { 
     let location : CLLocationCoordinate2D = manager.location!.coordinate; 
     CLGeocoder().reverseGeocodeLocation(manager.location!, completionHandler: {(placemarks, error)->Void in 

      if (error != nil) 
      { 
       print("Reverse geocoder failed with error" + error!.localizedDescription) 
       return 
      } 

      if placemarks!.count > 0 
      { 
       let pm : CLPlacemark = placemarks![0] 
       //stop updating location to save battery life 

       let locality = (pm.locality != nil) ? pm.locality : "" 

       let state = pm.administrativeArea 

       let countryCode = pm.ISOcountryCode 



       if(countryCode == "CAN") 
       { 
        self.LocationLabel.text = "in "+locality!+", "+state! 

        self.NewCurrentLongitude = location.longitude; 

        self.NewCurrentLatitude = location.latitude; 

       } 
       else 
       { 
        self.LocationLabel.text = "in Toronto, ON" 

        self.NewCurrentLatitude = 43.761539; 

        self.NewCurrentLongitude = -79.411079; 

        print("Manual location Label.") 
       } 

       self.locationManager.stopUpdatingLocation() 

      } 
      else 
      { 
       print("Problem with the data received from geocoder") 
      } 
      self.LoadBusinesses() 

      NSUserDefaults.standardUserDefaults().setDouble(self.NewCurrentLongitude, forKey: "UserLongitude") 

      NSUserDefaults.standardUserDefaults().setDouble(self.NewCurrentLatitude, forKey: "UserLatitude") 

      NSUserDefaults.standardUserDefaults().synchronize() 


     }) 




    } 


    // location load failure 
    func locationManager(manager: CLLocationManager, didFailWithError error: NSError) 
    { 
     print("Error while updating location " + error.localizedDescription) 
    } 






    // web services method 
    func LoadBusinesses() 
    { 
     print("Inside Load Business") 

     let token = NSUserDefaults.standardUserDefaults().valueForKey("access_token") as! String 

     let headers = ["x-access-token": token] 

     var StringUrl:String = "http:some url" 

     StringUrl += "?lat=\(self.NewCurrentLatitude)" 

     StringUrl += "&long=\(self.NewCurrentLongitude)" 

     print(StringUrl) 

     let request = NSMutableURLRequest(URL: NSURL(string: StringUrl)!, 
              cachePolicy: .UseProtocolCachePolicy, 
              timeoutInterval: 10.0) 
     request.HTTPMethod = "GET" 
     request.allHTTPHeaderFields = headers 

     let session = NSURLSession.sharedSession() 
     let dataTask = session.dataTaskWithRequest(request, completionHandler: { (data, response, error) -> Void in 
      if (error != nil) 
      { 
       print(error) 
      } 
      else 
      { 

        if let json = (try? NSJSONSerialization.JSONObjectWithData(data!, options: [])) as? NSDictionary 
        { 
         let success = json["success"] as? Int 

         if (success == 1) 
         { 
          if let reposArray = json["data"] as? [NSDictionary] 
          { 
           self.arrDict.removeAll() 
           for item in reposArray 
           { 
            let itemObj = item as? Dictionary<String,AnyObject> 

            let b_type = itemObj!["business_type"] 

            // taxis type 
            if (b_type as? String == self.BTypeId) 
            { 
            self.arrDict.append(Businessdata(json:item)) 
            print("load data") 


            } 

           } 
           dispatch_async(dispatch_get_main_queue(),{ 


            self.TableViewList.reloadData() 

            print("load data 1") 
           }) 

          } 
         } 
         else 
         { 
          let message = json["message"] as? String 
          print(message) 
         } 
        } 

      } 
     }) 
     dataTask.resume() 
    } 

    func numberOfSectionsInTableView(tableView: UITableView) -> Int 
    { 
      print("load data 2") 
     return self.arrDict.count 


    } 

    // number of rows 
    func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int 
    { 
     return 1 
    } 



    // calling each cell based on tap and users (premium/non premium) 
    func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell 
    { 
      print("load data 3") 

     let cell:customCell = self.TableViewList.dequeueReusableCellWithIdentifier("cell") as! customCell 

     cell.vendorName.text = arrDict[indexPath.row].BusinessName 
     cell.vendorAddress.text = arrDict[indexPath.row].Address 
     cell.VendorRating.rating = arrDict[indexPath.row].Rating! 

     return cell 

    } 

    // height of cell based on tap 
    func tableView(tableView: UITableView, heightForRowAtIndexPath indexPath: NSIndexPath) -> CGFloat 
    { 
     if(isTapped == true && selectedIndex == indexPath) 
     { 
      return 125.0; 
     } 

     return 80.0; 
    } 

    // did select row of table view 
    func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) 
    { 

     selectedIndex = indexPath; 

     isTapped = true; 

     print("load data 4") 
     // TableViewList.reloadData(); 

    } 


} 

Meine vollständige Code .In diesem gleichen Problem auch gleiche Daten 3 Mal .In meine consloe ich bin facing.Showing wird die Druckfunktion auch Drucken von zwei time.I measn die Ausführung zweimal funktionieren:

load data 2 
load data 2 
load data 2 
Manual location Label. 
Inside Load Business 
http://some url?lat=43.761539&long=-79.411079 
load data 
load data 2 
load data 1 
load data 3 
0 
1 
2 
3 
4 

Answer 1

Ihr Code sollte in etwa so aussehen. Sie sollten Ihre tableView neu laden, nachdem Sie die Daten analysiert haben.

if let reposArray = json["data"] as? [NSDictionary] { 
    self.arrDict.removeAll() 
    for item in reposArray { 
     let itemObj = item as? Dictionary<String,AnyObject> 
     let b_type = itemObj!["business_type"] 
     // taxis type 
     if (b_type as? String == self.BTypeId) { 
      self.arrDict.append(Businessdata(json:item)) 
     }  
    }     
    dispatch_async(dispatch_get_main_queue(),{ 
     self.TableViewList.reloadData() 
    }) 
}