带有定位音频 SCNAudioPlayer 的 ARKit SceneKit ARSCNView 不会停止播放

ARKit SceneKit ARSCNView with Positional Audio SCNAudioPlayer WILL NOT STOP playing

运行 带有 ARSCNView 的 ARKit 2.0。 iOS12 该应用程序使用多线程,这就是为什么这些功能在主线程上执行的原因(只是为了确定)。我也尝试过在主线程上不显式执行这些功能,但没有用。

我使用的是 .aiff 声音文件,但也尝试过 .wav。不开心。

我什至尝试从节点层次结构中删除 audioNode_alarm 并且声音仍在播放。我什至从视图层次结构中删除了 ARSCNView,声音仍在播放。 FFS

据我所知,我正在按照我应该做的事情来停止播放音频。无论我尝试什么,音频都不会停止。谁能想到为什么?!

weak var audioNode_alarm: SCNNode!
weak var audioPlayer_alarm: SCNAudioPlayer?

func setupAudioNode() {

    let audioNode_alarm = SCNNode()
    addChildNode(audioNode_alarm)
    self.audioNode_alarm = audioNode_alarm

}

func playAlarm() {

    DispatchQueue.main.async { [unowned self] in

        self.audioNode_alarm.removeAllAudioPlayers()

        if let audioSource_alarm = SCNAudioSource(fileNamed: "PATH_TO_MY_ALARM_SOUND.aiff") {

            audioSource_alarm.loops = true
            audioSource_alarm.load()
            audioSource_alarm.isPositional = true
            let audioPlayer_alarm = SCNAudioPlayer(source: audioSource_alarm)
            self.audioNode_alarm.addAudioPlayer(audioPlayer_alarm)
            self.audioPlayer_alarm = audioPlayer_alarm

        }

    }

}

func stopAlarm() {

    DispatchQueue.main.async { [unowned self] in

        self.audioNode_alarm?.removeAudioPlayer(self.audioPlayer_alarm!)
        self.audioNode_alarm?.removeAllAudioPlayers()

    }

}

我最后做的是通过

停止声音并移除播放器
yourNode.audioPlayers.forEach { audioLocalPlayer in
  audioLocalPlayer.audioNode?.engine?.stop()
  yourNode.removeAudioPlayer(audioLocalPlayer)
}

根据文档 SCNAudioPlayer has audioNode,应该使用 "to vary parameters such as volume and reverb in real time during playback"。

audioNodeAVAudioNode类型,所以如果我们跳转到engine prop and its type定义,我们会找到所有的控件我们需要。