swift program to get files from url to play as well as for download -

i'm want play files url, , url saved in array , play them online .

no idea how appreciable.

fatal error coming

`override func viewdidload() { super.viewdidload()

let url = nsurl(string: "http://royalwap.net/48-740090s/na%20na%20na%20na.mp3")

let urlrequest = nsurlrequest( url: url! )

var error: nserror? = nil  nsurlconnection.sendasynchronousrequest(urlrequest, queue: nsoperationqueue(), completionhandler: {response, data , error in         if error != nil {             println("there error")         } else {        self.player = avaudioplayer(contentsofurl: url , error: nil )       self.player.play()     }})  }` 

use avplayer stream audio url, wont able avaudioplayer unless download it.

    let url = nsurl(string: "http://royalwap.net/48-740090s/na%20na%20na%20na.mp3")!      let playeritem = avplayeritem(url: url)      player = avplayer(playeritem: playeritem)      player.play()