xcode - Sound ID failing in Swift -


i have following code linked button should play audio.

var exampleplayer = avaudioplayer()  var example = nsurl(fileurlwithpath: nsbundle.mainbundle().pathforresource("example", oftype: "mp3")!)  func exampleaudio(){      exampleplayer = avaudioplayer(contentsofurl: example, error: nil)     exampleplayer.preparetoplay()     exampleplayer.play() }  @ibaction func anotherexampleaudio(sender: anyobject) {      exampleaudio() }

this error i'm getting.

fatal error: unexpectedly found nil while unwrapping optional value

what's going on?


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