ios - Missing argument for parameter #1 in call when using findObjectsInBackgroundWithTarget -


i trying array of pfobjects, [pfobject], parse , seeing issue below. missing?

error missing argument parameter #1 in call

func loaddata() {     rooms = [pfobject]()     users = [pfuser] ()      self.tableview.reloaddata()      let pred = nspredicate(format: "user1 = %@ or user2 = %@", pfuser.currentuser()!, pfuser.currentuser()!)      let roomquery = pfquery(classname: "rooms", predicate: pred)      //gives information - includekey columns user class     roomquery.includekey("user1")     roomquery.includekey("user2")      roomquery.findobjectsinbackgroundwithtarget{ (results: [anyobject]!, error: nserror!) -> void in          if error == nil {             self.rooms = results [pfobject]              room in self.rooms {                 let user1 = room.objectforkey("user1") pfuser                 let user2 = room.objectforkey("user2") pfuser                  if user1.objectid != pfuser.currentuser() {                     self.users.append(user1)                 }                  if user2.objectid != pfuser.currentuser() {                     self.users.append(user2)                 }             }          self.tableview.reloaddata()          }       }  }

error: enter image description here

it seems want handle response block decided use findobjectsinbackgroundwithtarget. should go findobjectsinbackgroundwithblock:. should having this: 

roomquery.findobjectsinbackgroundwithblock {(objects: [anyobject]?, error: nserror?) -> void in

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