ios - Skaction.playsoundfilenamed crashes when repeat - sprite kit

Question

I have a problem with sprite kit SKAction.playSoundFileNamed. In practice, after some time it is played correctly , the app crashes saying it will not load . The file is included in the bundle import the project file exists and everything is properly set.

The only problem , after some time I play, I will crash saying it can not find the file , or at least can not be loaded .

My question is , is there a way to recharge every time the sound SKAction.playSoundFileNamed ?

EDIT - SOLVED

//init
var sound = SKAction.playSoundFileNamed("sound.mp3", waitForCompletion: false)
var sound2 = SKAction.playSoundFileNamed("sound2.mp3", waitForCompletion: false) 

//in the code call function when play sound:
playSound(sound)

...

func playSound(soundVariable : SKAction)
{
    runAction(soundVariable)   
}

The preload sounds instantiated no longer generates crash

Answer 1

prelound sound variable

//init
var sound = SKAction.playSoundFileNamed("sound.mp3", waitForCompletion: false)
var sound2 = SKAction.playSoundFileNamed("sound2.mp3", waitForCompletion: false) 

//in the code call function when play sound:
playSound(sound)

...

func playSound(soundVariable : SKAction)
{
    runAction(soundVariable)   
}