SpeechKit 所需条件为假：IsFormatSampleRateAndChannelCountValid(format)

Question

我们已经为听写实现了 SpeechKit。它工作正常，但有时会从一些用户那里崩溃。当用户点击开始录制音频引擎时。

代码：

    if recognitionTask != nil {
        recognitionTask?.cancel()
        recognitionTask = nil
    }

    let node = audioEngine.inputNode
    let recordingFormat = node.outputFormat(forBus: 0)
    node.installTap(onBus: 0, bufferSize: 1024, format: recordingFormat) { buffer, _ in
        self.request.append(buffer)
    }
    audioEngine.prepare()
    do {
        try audioEngine.start()
    } catch {
        self.sendAlert(message: "There has been an audio engine error.")
        return print(error)
    }

    guard let myRecognizer = SFSpeechRecognizer() else {
        self.sendAlert(message: "Speech recognition is not supported for your current locale.")
        return
    }

    if !myRecognizer.isAvailable {
        self.sendAlert(message: "Speech recognition is not currently available. Check back at a later time.")
        // Recognizer is not available right now
        return
    }

    recognitionTask = speechRecognizer?.recognitionTask(with: request, resultHandler: { result, error in
    //Code here
    })

错误：

致命异常：com.apple.coreaudio.avfaudio 所需条件为 false: IsFormatSampleRateAndChannelCountValid(格式)

Answer 1

这个问题是因为您可能在虚拟机或任何未连接任何麦克风的设备上运行您的项目。如果您在连接麦克风的真实 Mac 设备上运行项目或在真实 iOS 设备上运行项目，则不会遇到此问题