data passing and using json data from alamofire with swift -

i integrated alamofire, got 1 problem use data within server communication.

before tell problem show code:

class viewcontroller: uiviewcontroller, uitableviewdatasource, uitableviewdelegate {  @iboutlet weak var mainviewtable: uitableview! @iboutlet weak var sidesopen: uibarbuttonitem! @iboutlet weak var groupbutton: uibutton!  var apps:[sample] = [sample]()   override func viewdidload() {     super.viewdidload()       sidesopen.target = self.revealviewcontroller()     sidesopen.action = selector("revealtoggle:")     self.view.addgesturerecognizer(self.revealviewcontroller().pangesturerecognizer())     self.setupsample()  }    override func didreceivememorywarning() {     super.didreceivememorywarning()     // dispose of resources can recreated. }      func setupsample()    {     alamofire.request(.get, "http://{url}").responsejson{ (request, response, data, error) in         var json = json(data!)          var index = 0; index < json["store"].count; ++index{             var marketinfo = json["store"][index]["name"].stringvalue             var imageurl = json["store"][index]["img"].stringvalue             let sample_menu = sample(marketinfo: marketinfo, imagename: imageurl, button: "")             self.apps.append(sample_menu)         }      }    print(self.apps) }   func tableview(tableview: uitableview, numberofrowsinsection section: int) -> int {     return apps.count }  func tableview(tableview: uitableview, cellforrowatindexpath indexpath: nsindexpath) -> uitableviewcell {      print(setupsample())      let cell: tblcell = tableview.dequeuereusablecellwithidentifier("marketcell") as! tblcell     let sample = apps[indexpath.row]     cell.setcell(sample.marketinfo , imagename: sample.imagename, coupon: "s/t.jpeg")      return cell } } 

within setupsample function have got 1 problem have no idea passing or taking out json data. in function tried print result can have however, result empty.