我目前使用 Swift 开发的应用程序将帮助盲人使用这个综合解决方案来探索世界。我想为应用程序制作一个通用功能,当调用时,会立即开始录音,听用户说些什么,一旦用户停止说话,它会自动停止录音,将录音转换为字符串,然后返回它。此功能应该在单个 View Controller 中多次使用。
我已尝试使用本文中的技术,但没有奏效:https://medium.com/ios-os-x-development/speech-recognition-with-swift-in-ios-10-50d5f4e59c48
记录器将收集建筑物或建筑物中房间的名称,因此不需要记录很长时间 - 即使设置为 5 秒的时间长度也可以。我希望使用 Speech 之类的框架来配合 Siri,但如果效果更好,我不反对使用 Watson 这样的外部框架。请帮忙!
最佳答案
有一个漂亮的 appcoda 教程 here ,这非常适合。
这是他们用来用语音结果更新文本字段的代码。将文本字段中的文本引导到您用来处理结果的任何变量/函数都不会太困难。
//
// ViewController.swift
// Siri
//
// Created by Sahand Edrisian on 7/14/16.
// Copyright © 2016 Sahand Edrisian. All rights reserved.
//
import UIKit
import Speech
class ViewController: UIViewController, SFSpeechRecognizerDelegate {
@IBOutlet weak var textView: UITextView!
@IBOutlet weak var microphoneButton: UIButton!
private let speechRecognizer = SFSpeechRecognizer(locale: Locale.init(identifier: "en-US"))!
private var recognitionRequest: SFSpeechAudioBufferRecognitionRequest?
private var recognitionTask: SFSpeechRecognitionTask?
private let audioEngine = AVAudioEngine()
override func viewDidLoad() {
super.viewDidLoad()
microphoneButton.isEnabled = false
speechRecognizer.delegate = self
SFSpeechRecognizer.requestAuthorization { (authStatus) in
var isButtonEnabled = false
switch authStatus {
case .authorized:
isButtonEnabled = true
case .denied:
isButtonEnabled = false
print("User denied access to speech recognition")
case .restricted:
isButtonEnabled = false
print("Speech recognition restricted on this device")
case .notDetermined:
isButtonEnabled = false
print("Speech recognition not yet authorized")
}
OperationQueue.main.addOperation() {
self.microphoneButton.isEnabled = isButtonEnabled
}
}
}
@IBAction func microphoneTapped(_ sender: AnyObject) {
if audioEngine.isRunning {
audioEngine.stop()
recognitionRequest?.endAudio()
microphoneButton.isEnabled = false
microphoneButton.setTitle("Start Recording", for: .normal)
} else {
startRecording()
microphoneButton.setTitle("Stop Recording", for: .normal)
}
}
func startRecording() {
if recognitionTask != nil { //1
recognitionTask?.cancel()
recognitionTask = nil
}
let audioSession = AVAudioSession.sharedInstance() //2
do {
try audioSession.setCategory(AVAudioSessionCategoryRecord)
try audioSession.setMode(AVAudioSessionModeMeasurement)
try audioSession.setActive(true, with: .notifyOthersOnDeactivation)
} catch {
print("audioSession properties weren't set because of an error.")
}
recognitionRequest = SFSpeechAudioBufferRecognitionRequest() //3
guard let inputNode = audioEngine.inputNode else {
fatalError("Audio engine has no input node")
} //4
guard let recognitionRequest = recognitionRequest else {
fatalError("Unable to create an SFSpeechAudioBufferRecognitionRequest object")
} //5
recognitionRequest.shouldReportPartialResults = true //6
recognitionTask = speechRecognizer.recognitionTask(with: recognitionRequest, resultHandler: { (result, error) in //7
var isFinal = false //8
if result != nil {
self.textView.text = result?.bestTranscription.formattedString //9
isFinal = (result?.isFinal)!
}
if error != nil || isFinal { //10
self.audioEngine.stop()
inputNode.removeTap(onBus: 0)
self.recognitionRequest = nil
self.recognitionTask = nil
self.microphoneButton.isEnabled = true
}
})
let recordingFormat = inputNode.outputFormat(forBus: 0) //11
inputNode.installTap(onBus: 0, bufferSize: 1024, format: recordingFormat) { (buffer, when) in
self.recognitionRequest?.append(buffer)
}
audioEngine.prepare() //12
do {
try audioEngine.start()
} catch {
print("audioEngine couldn't start because of an error.")
}
textView.text = "Say something, I'm listening!"
}
func speechRecognizer(_ speechRecognizer: SFSpeechRecognizer, availabilityDidChange available: Bool) {
if available {
microphoneButton.isEnabled = true
} else {
microphoneButton.isEnabled = false
}
}
}
关于ios - Swift 中的语音转字符串,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/44681644/