how to loop AvAudioPlayerNode in Xcode10

Question

Hi I am making an iOS game in SpriteKit and decided to use an AvAudioPlayerNode and engine instead off the regular AvAudioPlayer so I could change the pitch and playbackspeed but I have come across a problem in which the AvAudioPlayerNode doesn't repeat after being played

I have already used many answers from stack overflow but they are very out dated if you do happen to solve this can u make sure it works with my code otherwise its useless

//

let engine = AVAudioEngine()
let speedControl = AVAudioUnitVarispeed()
let pitchControl = AVAudioUnitTimePitch()
let audioplayer = AVAudioPlayerNode()
let audioPath = Bundle.main.path(forResource: "loop", ofType: "wav")


func play(_ url: URL) throws {

 let file = try AVAudioFile(forReading: url)



 engine.attach(audioplayer)
 engine.attach(pitchControl)
 engine.attach(speedControl)

 engine.connect(audioplayer, to: speedControl, format: nil)
 engine.connect(speedControl, to: pitchControl, format: nil)
 engine.connect(pitchControl, to: engine.mainMixerNode, format: nil)

 audioplayer.scheduleFile(file, at: nil)

 try engine.start()
 audioplayer.play()


}

'

//This simply gets run in the game view controller by doing this

let audioPath = Bundle.main.path(forResource: "loop", ofType: "wav") ?? ""

    do
    {

        try? play(URL(fileURLWithPath: audioPath))
    }
    catch {
}

I actually have no idea where to start I am fairly new to Xcode so any help would be useful, please don't over complicate things I am 15

Answer 1

You want to read your file into a buffer, then schedule the player to loop

let file = try AVAudioFile(forReading: url)
let audioFileBuffer = AVAudioPCMBuffer(PCMFormat: file.fileFormat, frameCapacity: file.length)
try? read(into buffer: audioFileBuffer )
audioFilePlayer.scheduleBuffer(audioFileBuffer, atTime: nil, options:.Loops, completionHandler: nil)
audioFilePlayer.play()