swift - Tableview works on sim but not on test device -

i have no idea whats wrong function. i'm calling in viewdidload , prints array blank when load on phone. when in simulator fills array though. using objectmapper if helps @ all.

func getdata() {      let myurlstring = "http://meetup.x10host.com/api/get_event.php?radius=15"     let myurl = nsurl(string: myurlstring)!       var mycardsarray = [card]()       let mysession = nsurlsession(configuration: nsurlsessionconfiguration.defaultsessionconfiguration())      let mydatatask = mysession.datataskwithurl(myurl) { (data, response, error) in         guard error == nil else {             let alertcontroller = uialertcontroller(title: "no connection", message:                 "can't connect database, perhaps turn on wifi?", preferredstyle: uialertcontrollerstyle.alert)             alertcontroller.addaction(uialertaction(title: "okay", style: uialertactionstyle.default,handler: nil))             self.presentviewcontroller(alertcontroller, animated: true, completion: nil)             return         }         {             let jsondata = try nsjsonserialization.jsonobjectwithdata(data!, options: nsjsonreadingoptions.allowfragments)             somecard in jsondata as! nsarray{                 let card = mapper<card>().map(somecard)                 mycardsarray.append(card!)                  self.namearray.append(card!.titlee!)                 self.textarray.append(card!.text!)                 self.userarray.append(card!.attending!)                 self.latarray.append(card!.latitude!)                 self.longarray.append(card!.longitude!)                 self.timearray.append(card!.time!)                 self.loctextarray.append(card!.locationtext!)                   dispatch_async(dispatch_get_main_queue()) {                 self.tableview.reloaddata()                 }             }         } catch {             print("there error")         }     }     mydatatask.resume()    print(namearray) }