ios - User's friend list tableview is empty and parse query did not return any data -

this code in swift

class userviewcontroller: uitableviewcontroller {  var userarray: nsmutablearray = []  @iboutlet weak var friendlisttableview: uitableview! override func viewdidload() {     super.viewdidload()         retrievemessages()     } func retrievemessages() {     var query = pfuser.query()     if let username = pfuser.currentuser().username {         query.wherekey("username", equalto: username)         query.findobjectsinbackgroundwithblock {         (objects, error) -> void in          object in objects! {             let usernames:string? = (object pfobject)["friends"] as? string             println(usernames) // prints nil             if usernames != nil {                 self.userarray.addobject(usernames!)             }         }                 dispatch_async(dispatch_get_main_queue()) {                     self.friendlisttableview.reloaddata()                 }      }  } }             override func didreceivememorywarning() {     super.didreceivememorywarning()     // dispose of resources can recreated. }  // mark: - table view data source  override func numberofsectionsintableview(tableview: uitableview) -> int {     // #warning potentially incomplete method implementation.     // return number of sections.     return 1 }  override func tableview(tableview: uitableview, numberofrowsinsection section: int) -> int {     // #warning incomplete method implementation.     // return number of rows in section.     return userarray.count }   override func tableview(tableview: uitableview, cellforrowatindexpath indexpath: nsindexpath) -> uitableviewcell {      // update - replace as!      let cell = tableview.dequeuereusablecellwithidentifier("cell", forindexpath: indexpath) uitableviewcell      cell.textlabel?.text = userarray[indexpath.row] as? string      return cell } 

i've saved current user's friend list pfrelation in class "user" in column "friends", here's how save

class adduserviewcontroller: uiviewcontroller {  @iboutlet weak var usernametextfield: uitextfield!  @ibaction func adduser(sender: anyobject) {     var query = pfuser.query()     query.wherekey("username", equalto: usernametextfield.text)     println("pass")     query.getfirstobjectinbackgroundwithblock{ (object:pfobject!, error: nserror!) -> void in          if error == nil {             let currentuser = pfuser.currentuser()             let friendlist = currentuser.relationforkey("friends")              var addfriend = object             if addfriend != nil {                 friendlist.addobject(addfriend)                 println("added")             }             pfuser.currentuser().saveinbackgroundwithblock{                 (succeeded: bool!, error: nserror!) in                  if error != nil {                     println("error")                 }                 else {                     println("saved")                 }             }         }      } } 

and want retrieve current user's friend list show in tableview problem can't update tableview show current user's friend list, it's empty , there's no user list in tableview @ all. code correct method? if not please me correct code

here's screenshot of user's class table in parse

here's screenshot of current user's friend in parse save pfrelation appreciated, thank you!

i haven't used parse in while, if i'm not mistaken, first query (in first chunk of code) isn't built correctly. should this:

 var query:pfquery = pfquery(classname: "user")  if let username = pfuser.currentuser().username {    query.wherekey("username", equalto: username)    query.findobjectsinbackgroundwithblock {....}  } 

the difference here query current user's username , not object itself. help?