Swift 长按录制声音并转换为文字 - 完整指南 - 常规

在 Swift 中实现长按录制声音并转换成文字，可以按照以下步骤进行：

导入 AVFoundation 框架：在你的 Swift 文件的顶部添加 'import AVFoundation'。
创建一个 AVAudioRecorder 实例来录制声音：

var audioRecorder: AVAudioRecorder!

初始化 AVAudioRecorder：

func initAudioRecorder() {
    let audioFilename = getDocumentsDirectory().appendingPathComponent('recording.wav')
    let settings = [
        AVFormatIDKey: Int(kAudioFormatLinearPCM),
        AVSampleRateKey: 44100,
        AVNumberOfChannelsKey: 2,
        AVEncoderAudioQualityKey: AVAudioQuality.high.rawValue
    ]
    
do {
        audioRecorder = try AVAudioRecorder(url: audioFilename, settings: settings)
        audioRecorder.delegate = self
    } catch {
        print('Failed to initialize audio recorder: (error)')
    }
}

开始录制声音：

func startRecording() {
    if audioRecorder == nil {
        initAudioRecorder()
    }
    
if audioRecorder.isRecording {
        audioRecorder.stop()
    }
    
audioRecorder.record()
}

停止录制声音：

func stopRecording() {
    audioRecorder.stop()
}

创建一个 AVAudioPlayer 实例来播放录制的声音：

var audioPlayer: AVAudioPlayer!

初始化 AVAudioPlayer：

func initAudioPlayer() {
    let audioFilename = getDocumentsDirectory().appendingPathComponent('recording.wav')
    
do {
        audioPlayer = try AVAudioPlayer(contentsOf: audioFilename)
        audioPlayer.delegate = self
        audioPlayer.prepareToPlay()
    } catch {
        print('Failed to initialize audio player: (error)')
    }
}

播放录制的声音：

func playRecording() {
    if audioPlayer == nil {
        initAudioPlayer()
    }
    
if audioPlayer.isPlaying {
        audioPlayer.stop()
    }
    
audioPlayer.play()
}

创建一个 SpeechRecognizer 实例来将录制的声音转换成文字：

var speechRecognizer: SFSpeechRecognizer!

func initSpeechRecognizer() {
    speechRecognizer = SFSpeechRecognizer(locale: Locale(identifier: 'en-US'))
    speechRecognizer.delegate = self
}

转换录制的声音为文字：

func convertRecordingToText() {
    let audioFilename = getDocumentsDirectory().appendingPathComponent('recording.wav')
    let recognitionRequest = SFSpeechURLRecognitionRequest(url: audioFilename)
    
speechRecognizer.recognitionTask(with: recognitionRequest) { (result, error) in
        guard let result = result else {
            print('Failed to convert recording to text: (error)')
            return
        }
        
if result.isFinal {
            let text = result.bestTranscription.formattedString
            print('Converted text: (text)')
        }
    }
}

设置长按手势来控制录制和转换：

func setupLongPressGestureRecognizer() {
    let longPressGestureRecognizer = UILongPressGestureRecognizer(target: self, action: #selector(handleLongPress(_:)))
    longPressGestureRecognizer.minimumPressDuration = 0.5
    longPressGestureRecognizer.delegate = self
    yourButton.addGestureRecognizer(longPressGestureRecognizer)
}

@objc func handleLongPress(_ gestureRecognizer: UILongPressGestureRecognizer) {
    if gestureRecognizer.state == .began {
        startRecording()
    } else if gestureRecognizer.state == .ended {
        stopRecording()
        convertRecordingToText()
    }
}

请确保在使用之前允许应用程序访问麦克风和语音识别权限，并实现 'AVAudioRecorderDelegate'、'AVAudioPlayerDelegate' 和 'SFSpeechRecognizerDelegate' 协议中的必要方法。

以上是一个基本的实现，你可以根据你的需求进行修改和扩展。