uitableview - Hi there , I'm new to iOS development and I'm having a hard time populating a tableview embedded in a UIviewcontroller with json data -

i'm new ios development , i'm having hard time populating tableview embedded in uiviewcontroller json data.

''import uikit

class

firstviewcontroller:uiviewcontroller,uitableviewdatasource,uitableviewdelegate{

@iboutlet weak var tableview: uitableview!       var tabledata:array< string > = array < string >()        var valuetopass:string!   override func viewdidload() {      super.viewdidload()       get_data_from_url("http://www.kaleidosblog.com/tutorial/tutorial.json")  }   override func didreceivememorywarning() {      super.didreceivememorywarning()   }   func numberofsections(in tableview: uitableview) -> int {     return 1 }  func tableview(_ tableview: uitableview, numberofrowsinsection section: int) -> int {     return tabledata.count }    func tableview(_ tableview: uitableview, cellforrowat indexpath: indexpath) -> uitableviewcell {      let cell = tableview.dequeuereusablecell(withidentifier: "firstviewcell", for: indexpath)      cell.textlabel?.text = tabledata[indexpath.row]      return cell }    func get_data_from_url(_ link:string) {     let url:url = url(string: link)!     let session = urlsession.shared      let request = nsmutableurlrequest(url: url)     request.httpmethod = "get"     request.cachepolicy = nsurlrequest.cachepolicy.reloadignoringcachedata       let task = session.datatask(with: request urlrequest, completionhandler: {         (         data, response, error) in          guard let _:data = data, let _:urlresponse = response  , error == nil else {              return         }           self.extract_json(data!)       })      task.resume()  }   func extract_json(_ data: data) {       let json: any?          {         json = try jsonserialization.jsonobject(with: data, options: [])     }     catch     {         return     }      guard let data_list = json as? nsarray else     {         return     }       if let countries_list = json as? nsarray     {         in 0 ..< data_list.count         {             if let country_obj = countries_list[i] as? nsdictionary             {                 if let country_name = country_obj["country"] as? string                 {                     if let country_code = country_obj["code"] as? string                     {                         tabledata.append(country_name + " [" + country_code + "]")                     }                 }             }         }     }          dispatchqueue.main.async(execute: {self.do_table_refresh()})  }  func do_table_refresh() {     tableview.reloaddata()  } 

}

you need set tableview's datasource , delegate self.