sprite kit - How to stop/cancel playSoundFileNamed in Swift? -

i'm trying make button, when pushed - sound played, , when pushed again - sound stop. i'm using playsoundfilenamed: runaction: withkey: , removeactionforkey, doesn't work.

the other question have if there way not stop sound, pause (so start same part paused, not beginning). i've seen similar topic @ stack overflow, yet didn't find answer on question yet. thank in advance.

import spritekit import avfoundation  var firesoundon = false  private var backgroundmusicplayer: avaudioplayer!  class gamescene2: skscene {  override func didmovetoview(view: skview) {      setupscenery()     }  private func setupscenery() {       //background     let background = skspritenode(imagenamed: backgroundimage, normalmapped: true)     addchild(background)       //fire button      var firepath = uibezierpath()      firepath.movetopoint(cgpointmake(0, 0))      firepath.addcurvetopoint(cgpointmake(115, 215), controlpoint1: cgpointmake(5, 170), controlpoint2: cgpointmake(90, 190)) .... 

//^i'm cutting down lot of path here - button drawn , it's pushable/workable.

    let firenode = skshapenode(path: firepath.cgpath, centered: false)     firenode.alpha = 0.2      firenode.position = cgpointmake(size.width/2, 0)     firenode.name = "firenode"          self.addchild(firenode) } 

//so, main bummer me:

func fireturnonoff () {      if firesoundon == false {          var playguitar = skaction.playsoundfilenamed("guitar.wav", waitforcompletion: true)         runaction(playguitar, withkey: "soundsison")          firesoundon = true         println("firesoundon == \(firesoundon)")      }      else if firesoundon == true {          removeactionforkey("soundsison")         println("removed")          firesoundon = false         println("firesoundon == \(firesoundon)")      }  }   override func touchesended(touches: set<nsobject>, withevent event: uievent) {     touch: anyobject in touches {         let touch = touches.first as? uitouch          let touchlocation = touch!.locationinnode(self)         let node: sknode = nodeatpoint(touchlocation)          if node.name == "firenode" {              fireturnonoff()          } } } 

use avaudioplayer. allows start, stop, pause, control volume, number of loops , other features.