swift - Why is my SKAudioNode giving me an error?

Question

I'm getting the following error when playing a sound using SKAudioNode and SKAction.play():

2021-01-23 13:58:10.169108-0800 [AppNameHere][56755:10871021] [aurioc] AURemoteIO.h:323:entry: Unable to join I/O thread to workgroup ((null)): 2

The sound does play, but the very first time it plays it causes the app to sort of jump/skip/pause for a moment. So, I'm getting an error accompanied by a pause.

Here's my code, which sits in a function that's called from didBegin(_ contact: SKPhysicsContact)

//Load the sound
let audio = SKAudioNode(fileNamed: "clink.wav")

//Prevent the sound from looping infinitely                
audio.autoplayLooped = false

//Add the sound to the scene                
self.addChild(audio)

//Play the sound
let playAction = SKAction.play()
audio.run(playAction)

//Wait for 1 second so the sound can complete, then remove it from the scene
DispatchQueue.main.asyncAfter(deadline: .now() + 1.0) {
   audio.removeFromParent()
}

Why is this problem happening, and how do I solve it?

Thanks for your help!

UPDATE: I apparently need to "Edit the question to include desired behavior, a specific problem or error, and the shortest code necessary to reproduce the problem. This will help others answer the question."

Desired behavior: The sound should play without an error and without causing the app to jump/skip for a moment.

Specific problem or error: See error above.

Shortest code necessary to reproduce the problem: See code above.

I've also added notes in the code to explain what each line does.

question from:https://stackoverflow.com/questions/65864959/why-is-my-skaudionode-giving-me-an-error

Answer 1

There are different ways to get this working, if you want to use SKAudioNode then you could do the following.

Near the top of the GameScene file, create a variable:

var audio = SKAudioNode()

In "didMove(to view: SKView)" add the below lines:

audio = SKAudioNode(fileNamed: "clink.wav")
audio.autoplayLooped = false
addChild(audio)

In your function (which gets called in your didBegin(_ contact: SKPhysicsContact)), put the below lines in:

  let playAction = SKAction.play()
  let wait = SKAction.wait(forDuration: 1.0)
  let grp = SKAction.group([playAction, wait])
  let rfp = SKAction.removeFromParent()
  let sequence = SKAction.sequence([grp, rfp])
  audio.run(sequence)

Typically, you wouldn't need such an approach, but SKAction.play() doesn't seem to work with the completion: block, therefore i had to include a duration of 1 second (which is what you were happy doing before). That should work.

Another approach, which is simpler, is:

var audio: SKAction?

Then in didMove(to view) put:

audio = SKAction.playSoundFileNamed("Clink.wav", waitForCompletion: false)

Then in your function just put this:

  self.run(audio!, completion: {
    self.removeFromParent()
    })