swift - Saving highscores with NSUserDefaults -

i'm trying save highscore of game. i'm trying via nsuserdefaults. code i'm using:

//to save highest score var highestscore:int = 20 nsuserdefaults.standarduserdefaults().setobject(highestscore, forkey:"highestscore") nsuserdefaults.standarduserdefaults().synchronize()  //to saved score var savedscore: int = nsuserdefaults.standarduserdefaults().objectforkey("highestscore") int println(savedscore) 

but error nsuserdefaults saying "expected declaration" , can't figure out how implement this. or should using nsarchiver this? , if case how implement this?

use nscoding. create swift file "highscore"

import foundation  class highscore: nsobject {      var highscore: int = 0      func encodewithcoder(acoder: nscoder!) {            acoder.encodeinteger(highscore, forkey: "highscore")     }      init(coder adecoder: nscoder!) {         highscore = adecoder.decodeintegerforkey("highscore")     }      override init() {     } }  class savehighscore:nsobject {      var documentdirectories:nsarray = []     var documentdirectory:string = ""     var path:string = ""      func archivehighscore(#highscore: highscore) {         documentdirectories = nssearchpathfordirectoriesindomains(.documentdirectory, .userdomainmask, true)         documentdirectory = documentdirectories.objectatindex(0) string         path = documentdirectory.stringbyappendingpathcomponent("highscore.archive")          if nskeyedarchiver.archiverootobject(highscore, tofile: path) {             println("success writing file!")         } else {             println("unable write file!")         }     }      func retrievehighscore() -> nsobject {         var datatoretrieve = highscore()         documentdirectories = nssearchpathfordirectoriesindomains(.documentdirectory, .userdomainmask, true)         documentdirectory = documentdirectories.objectatindex(0) string         path = documentdirectory.stringbyappendingpathcomponent("highscore.archive")         if let datatoretrieve2 = nskeyedunarchiver.unarchiveobjectwithfile(path) as? highscore {             datatoretrieve = datatoretrieve2         }         return(datatoretrieve)     } } 

then viewcontroller:

   import uikit       class viewcontroller: uiviewcontroller, uitextfielddelegate {         var score = highscore()          override func viewdidload() {             super.viewdidload()          score.highscore = 100         savehighscore().archivehighscore(highscore: score)         var retrievedhighscore = savehighscore().retrievehighscore() highscore         println(retrievedhighscore.highscore)          }     }