blog-speech-framework-10.swift

private func startRecording() throws {
    
    if let recognitionTask = recognitionTask {
        recognitionTask.cancel()
        self.recognitionTask = nil
    }
    let path = Bundle.main.path(forResource: "your-file", ofType: "mp3")
    if let path = path {
        let url = URL(fileURLWithPath: path)
        recognitionRequest = SFSpeechURLRecognitionRequest(url: url)
    }
    guard let recognitionRequest = recognitionRequest else { fatalError("Unable to created a SFSpeechURLRecognitionRequest object") }
    recognitionRequest.shouldReportPartialResults = true
    
    recognitionTask = speechRecognizer.recognitionTask(with: recognitionRequest) { result, error in
        var isFinal = false
        
        if let result = result {
            self.textView.text = result.bestTranscription.formattedString
            isFinal = result.isFinal
        }
        
        if error != nil || isFinal {
            
            self.recognitionRequest = nil
            self.recognitionTask = nil
            
            self.recordButton.isEnabled = true
        }
    }
}