Swift中的语音到字符串

import Speech

let recognizer = SFSpeechRecognizer()
SFSpeechRecognizer.requestAuthorization { (authStatus) in
    if authStatus == .authorized {
        // 用户已授权语音识别，可以进行后续操作
    }
}

let recognitionRequest = SFSpeechAudioBufferRecognitionRequest()

let recognizer = SFSpeechRecognizer()

let audioEngine = AVAudioEngine()
let inputNode = audioEngine.inputNode

let recordingFormat = inputNode.outputFormat(forBus: 0)
inputNode.installTap(onBus: 0, bufferSize: 1024, format: recordingFormat) { (buffer, time) in
    recognitionRequest.append(buffer)
}

audioEngine.prepare()
try audioEngine.start()

// 开始识别任务
recognizer.recognitionTask(with: recognitionRequest) { (result, error) in
    if let result = result {
        let transcription = result.bestTranscription
        let text = transcription.formattedString
        // 获取到转换后的文本字符串
    } else if let error = error {
        // 发生错误，处理错误信息
    }
}