如何在iOS应用中集成AI语音识别 iOS集成Speech框架的代码示例

import Speech
import AVFoundation

func requestAuthorization() {
    SFSpeechRecognizer.requestAuthorization { authStatus in
        switch authStatus {
        case .authorized:
            print("语音识别已授权")
        case .denied:
            print("用户拒绝了语音识别权限")
        case .restricted, .notDetermined:
            print("权限未确定或受限")
        @unknown default:
            break
        }
    }

    // 请求麦克风权限
    AVAudioSession.sharedInstance().requestRecordPermission { granted in
        if granted {
            print("麦克风权限已开启")
        } else {
            print("麦克风权限被拒绝")
        }
    }
}

import Foundation
import Speech
import AVFoundation

var audioEngine = AVAudioEngine()
var recognitionRequest: SFSpeechAudioBufferRecognitionRequest?
var speechRecognizer = SFSpeechRecognizer(locale: Locale(identifier: "zh-CN")) // 可指定语言

func startRecording() throws {
    guard let node = audioEngine.inputNode as? AVAudioInputNode else { return }

    recognitionRequest = SFSpeechAudioBufferRecognitionRequest()
    guard let request = recognitionRequest else { return }

    request.shouldReportPartialResults = true // 开启部分结果返回

    let recordingFormat = node.outputFormat(forBus: 0)
    node.installTap(onBus: 0, bufferSize: 1024, format: recordingFormat) { buffer, _ in
        request.append(buffer)
    }

    audioEngine.prepare()
    try audioEngine.start()

    SFSpeechRecognizer().recognitionTask(with: request) { result, error in
        guard let result = result else {
            if let error = error {
                print("识别错误：$error)")
            }
            return
        }

        let bestString = result.bestTranscription.formattedString
        print("识别结果：$bestString)")

        if result.isFinal {
            self.audioEngine.stop()
            node.removeTap(onBus: 0)
            self.recognitionRequest = nil
        }
    }
}