我正在尝试创建一个应用程序，当用户不知道时，它会说一段会改变每个级别的文本。目标是说出显示的句子（是的，它是为孩子们制作的）：
@IBAction func dontknow(_ sender: Any) {
let utterance = AVSpeechUtterance(string: textLabel.text)
utterance.voice = AVSpeechSynthesisVoice(language: "fr-FR")
utterance.rate = 0.4
let synthesizer = AVSpeechSynthesizer()
synthesizer.speak(utterance)
}
应用程序的构造如下： 如果用户不知道 -> 他可以点击按钮说出文本 否则如果他是对的 -> 他进入下一个级别。
他第一次输入要说的按钮时，应用程序说了些什么，但是当用户尝试说出文本并在下一个级别单击要说的按钮时，没有任何反应。它只是抛出这个错误：
Failure starting audio queue ≥˚˛ˇ完整代码：
import UIKit
import AVFoundation
import Speech
class ReadViewController: UIViewController, SFSpeechRecognizerDelegate {
var texts = ["Je mange des pâtes", "Bonjour Jean comment vas-tu", "Qui est-ce", "J'en ai marre", "Je ne te trouve pas gentil", "Pourquoi tu ne veux pas","Tu es si gentil", "Tu es beau", "Dans combien de temps", "Tu as fait de beaux rêves", "Cette application est une révolution"];
var text = ""
var transcriptedText = "";
var effect:UIVisualEffect!
@IBOutlet weak var dontknowButton: UIButton!
@IBOutlet weak var listenButton: UIButton!
@IBOutlet weak var visualEffectView: UIVisualEffectView!
@IBOutlet var alertView: UIView!
@IBOutlet weak var regameButton: UIButton!
@IBOutlet weak var textView: UILabel!
@IBOutlet weak var textLabel: UILabel!
@IBOutlet weak var microphoneButton: UIButton!
@IBOutlet weak var transci: UILabel!
private let speechRecognizer = SFSpeechRecognizer(locale: Locale.init(identifier: "fr-FR")) //1
private var recognitionRequest: SFSpeechAudioBufferRecognitionRequest?
private var recognitionTask: SFSpeechRecognitionTask?
private let audioEngine = AVAudioEngine()
var recordingSession: AVAudioSession!
var player: AVAudioPlayer!
override func viewDidLoad() {
super.viewDidLoad()
listenButton.layer.cornerRadius = 10
dontknowButton.layer.cornerRadius = dontknowButton.frame.width / 2
self.restart()
// Do any additional setup after loading the view.
effect = visualEffectView.effect
visualEffectView.layer.opacity = 0
visualEffectView.effect = nil
regameButton.layer.cornerRadius = 10
microphoneButton.layer.cornerRadius = 10
microphoneButton.isEnabled = false //2
speechRecognizer?.delegate = self //3
SFSpeechRecognizer.requestAuthorization { (authStatus) in //4
var isButtonEnabled = false
switch authStatus { //5
case .authorized:
isButtonEnabled = true
case .denied:
isButtonEnabled = false
self.alert()
case .restricted:
isButtonEnabled = false
self.alert()
case .notDetermined:
isButtonEnabled = false
print("Speech recognition not yet authorized")
}
OperationQueue.main.addOperation() {
self.microphoneButton.isEnabled = isButtonEnabled
}
// self.effect = self.visualEffectView.effect
// self.visualEffectView.effect = nil
}
}
func alert () {
let alertController = UIAlertController (title: "Désolé", message: "Pour le bon fonctionnement de l'application, vous devez activer la reconnaissance vocale dans les réglages.", preferredStyle: .alert)
let settingsAction = UIAlertAction(title: "Réglages", style: .default) { (_) -> Void in
guard let settingsUrl = URL(string: UIApplicationOpenSettingsURLString) else {
return
}
if UIApplication.shared.canOpenURL(settingsUrl) {
UIApplication.shared.open(settingsUrl, completionHandler: { (success) in
print("Settings opened: \(success)") // Prints true
})
}
}
alertController.addAction(settingsAction)
present(alertController, animated: true, completion: nil)
}
func restart() {
var randomNumber = random(0..<(texts.count))
text = texts[randomNumber]
textLabel.text = "\(text)"
}
func startRecording() {
if recognitionTask != nil {
recognitionTask?.cancel()
recognitionTask = nil
}
let audioSession = AVAudioSession.sharedInstance()
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()
var inputNode = audioEngine.inputNode
guard let recognitionRequest = recognitionRequest else {
fatalError("Unable to create an SFSpeechAudioBufferRecognitionRequest object")
}
recognitionRequest.shouldReportPartialResults = true
recognitionTask = speechRecognizer?.recognitionTask(with: recognitionRequest, resultHandler: { (result, error) in
var isFinal = false
if result != nil {
self.transcriptedText = (result?.bestTranscription.formattedString)!
self.transci.text = self.transcriptedText
isFinal = (result?.isFinal)!
}
if error != nil || isFinal {
self.audioEngine.stop()
inputNode.removeTap(onBus: 0)
self.recognitionRequest = nil
self.recognitionTask = nil
self.transci.text = ""
self.microphoneButton.isEnabled = true
}
})
let recordingFormat = inputNode.outputFormat(forBus: 0)
inputNode.installTap(onBus: 0, bufferSize: 1024, format: recordingFormat) { (buffer, when) in
self.recognitionRequest?.append(buffer)
}
audioEngine.prepare()
do {
try audioEngine.start()
} catch {
print("audioEngine couldn't start because of an error.")
}
}
func speechRecognizer(_ speechRecognizer: SFSpeechRecognizer, availabilityDidChange available: Bool) {
if available {
microphoneButton.isEnabled = true
} else {
microphoneButton.isEnabled = false
}
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
func random(_ range:Range<Int>) -> Int
{
return range.lowerBound + Int(arc4random_uniform(UInt32(range.upperBound - range.lowerBound)))
}
@IBAction func start(_ sender: Any) {
if audioEngine.isRunning {
if self.transcriptedText == self.text {
// When user won
self.restart()
}
else {
// When user loses
animateIn()
}
audioEngine.stop()
recognitionRequest?.endAudio()
microphoneButton.isEnabled = false
microphoneButton.setTitle("Commencer", for: .normal)
} else {
startRecording()
microphoneButton.setTitle("Arrêter", for: .normal)
}
}
@IBAction func listen(_ sender: Any) {
let utterance = AVSpeechUtterance(string: "wesh")
utterance.voice = AVSpeechSynthesisVoice(language: "fr-FR")!
utterance.rate = 0.4
let synthesizer = AVSpeechSynthesizer()
synthesizer.speak(utterance)
}
@IBAction func reGameOn(_ sender: Any) {
animateOut()
}
@IBAction func dontknow(_ sender: Any) {
var randomNumber = random(0..<(texts.count))
var tet = texts[randomNumber]
let utterance = AVSpeechUtterance(string: textLabel.text)
utterance.voice = AVSpeechSynthesisVoice(language: "fr-FR")!
utterance.rate = 0.4
let synthesizer = AVSpeechSynthesizer()
synthesizer.speak(utterance)
print(synthesizer.isSpeaking)
print(synthesizer.isPaused)
}
func animateIn() {
self.view.addSubview(alertView)
alertView.center = self.view.center
alertView.transform = CGAffineTransform.init(scaleX: 1.3, y: 1.3)
alertView.alpha = 0
UIView.animate(withDuration: 0.4) {
self.alertView.layer.cornerRadius = 10
self.visualEffectView.layer.opacity = 1
self.visualEffectView.effect = self.effect
self.alertView.alpha = 1
self.alertView.transform = CGAffineTransform.identity
}
}
func animateOut () {
UIView.animate(withDuration: 0.3, animations: {
self.alertView.layer.cornerRadius = 0
self.alertView.transform = CGAffineTransform.init(scaleX: 1.3, y: 1.3)
self.alertView.alpha = 0
self.visualEffectView.effect = nil
self.visualEffectView.layer.opacity = 0
}) { (success:Bool) in
self.alertView.removeFromSuperview()
}
}
}
在@IBAction func dontKnow 尝试最后添加以下代码。这可能有效。
do{
let _ = try AVAudioSession.sharedInstance().setCategory(AVAudioSessionCategoryPlayback,
with: .duckOthers)
}catch{
print(error)
}
谢谢你，Abhay Singh！将那段代码添加到我的“speak()”函数的末尾，可以在运行 iOS 16 的 iPhone 14 上启用可听语音。请注意，从 2023 年 4 月起，我必须按如下方式更新代码：
do{
let _ = try AVAudioSession.sharedInstance().setCategory(AVAudioSession.Category.playback, options: .duckOthers)
}catch{
print(error)
}
音量出奇地低。也许分享导致了这个？