Ошибка Multitrack Audio AVAudioEngineSwiftUI - PullRequest
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Ошибка Multitrack Audio AVAudioEngineSwiftUI

0 голосов
/ 23 апреля 2020

Я пытаюсь создать многодорожечный аудиоплеер с AVAudioEngine в SwiftUI. Это в основном 4 отдельных трека (барабаны, бас, клавиши, щелчок), играющих одновременно. Я пытался создать его, используя документацию, которую нашел в Google, но я сталкиваюсь со следующей ошибкой: «Завершение приложения из-за необработанного исключения« com.apple.coreaudio.avfaudio », причина:« Обязательное условие - false : [_nodes containsObject: node1] && [_nodes containsObject: node2] '"- не могли бы вы мне помочь?

Поскольку я новичок в кодировании, не стесняйтесь, дайте мне знать, что смогу играть звук. 

import SwiftUI
import AVFoundation

class AudioMixer {
    let engine = AVAudioEngine()
    let player = AVAudioPlayer()
    let drumPlayer = AVAudioPlayerNode()
    let bassPlayer = AVAudioPlayerNode()
    let keysPlayer = AVAudioPlayerNode()
    let clickPlayer = AVAudioPlayerNode()
    let mixer = AVAudioMixerNode()


init() {
    let audioSession = AVAudioSession.sharedInstance()
    do {
       try audioSession.setCategory(AVAudioSession.Category.playback, options:   .mixWithOthers)
    try audioSession.setActive(true)
 } catch {
    print(error.localizedDescription)
 }




if let drumAudioPath = Bundle.main.path(forResource: "Drums1", ofType: "mp3") {
    let drumsAudioUrl = URL(fileURLWithPath: drumAudioPath)
    let drumsAudioFile =  try? AVAudioFile(forReading: drumsAudioUrl)
    engine.connect(drumPlayer, to: mixer, format: drumsAudioFile?.processingFormat)
    drumPlayer.scheduleFile(drumsAudioFile!, at: nil, completionHandler: nil)
}
drumPlayer.play()
engine.attach(drumPlayer)


if let bassAudioPath = Bundle.main.path(forResource: "Bass1", ofType: "mp3") {
       let bassAudioUrl = URL(fileURLWithPath: bassAudioPath)
    let bassAudioFile =  try? AVAudioFile(forReading: bassAudioUrl)
       engine.connect(bassPlayer, to: mixer, format: bassAudioFile?.processingFormat)
       bassPlayer.scheduleFile(bassAudioFile!, at: nil, completionHandler: nil)
   }
bassPlayer.play()
engine.attach(bassPlayer)


 if let keysAudioPath = Bundle.main.path(forResource: "Keys1", ofType: "mp3") {
       let keysAudioUrl = URL(fileURLWithPath: keysAudioPath)
    let keysAudioFile =  try? AVAudioFile(forReading: keysAudioUrl)
       engine.connect(keysPlayer, to: mixer, format: keysAudioFile?.processingFormat)
       keysPlayer.scheduleFile(keysAudioFile!, at: nil, completionHandler: nil)
   }
keysPlayer.play()
engine.attach(keysPlayer)


 if let clickAudioPath = Bundle.main.path(forResource: "Click1", ofType: "mp3") {
       let clickAudioUrl = URL(fileURLWithPath: clickAudioPath)
    let clickAudioFile =  try? AVAudioFile(forReading: clickAudioUrl)
       engine.connect(clickPlayer, to: mixer, format: clickAudioFile?.processingFormat)
       clickPlayer.scheduleFile(clickAudioFile!, at: nil, completionHandler: nil)
   }
clickPlayer.play()
engine.attach(clickPlayer)

engine.attach(mixer)

engine.prepare()
   do {
       try engine.start()
   }
   catch {
       print(error.localizedDescription)
   }
}

}

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