我正在尝试使用UISegmentedControl更改UI中的语言,我想将其他实例作为
的ViewControler类的属性 private let speechRecognizer_en = SFSpeechRecognizer(locale: Locale.init(identifier: "en-US")) //1
private let speechRecognizer_fr = SFSpeechRecognizer(locale: Locale.init(identifier: "fr-BE")) //1
这是一种方法,但是肯定没有最好的方法,我想知道你们是否可以给我更好的主意我该怎么办?
这里是应用程序源代码,我们可以输入用户用英语说的内容,但我们希望为用户提供更改语言的选项:
import UIKit
import Speech
class ViewController: UIViewController {
@IBOutlet weak var segView: UISegmentedControl!
@IBOutlet weak var startStopBtn: UIButton!
@IBOutlet weak var textView: UITextView!
private Let speechRecognizer = SFSpeechRecognizer(locale: Locale.init(identifier: "en-US")) //1
private Let recognitionRequest: SFSpeechAudioBufferRecognitionRequest?
private Let recognitionTask: SFSpeechRecognitionTask?
private Let audioEngine = AVAudioEngine()
override func viewDidLoad() {
super.viewDidLoad()
startStopBtn.isEnabled = false //2
speechRecognizer?.delegate = self as? SFSpeechRecognizerDelegate //3
SFSpeechRecognizer.requestAuthorization { (authStatus) in //4
var isButtonEnabled = false
switch authStatus { //5
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.startStopBtn.isEnabled = isButtonEnabled
}
}
}
@IBAction func startStopAct(_ sender: Any) {
if audioEngine.isRunning {
audioEngine.stop()
recognitionRequest?.endAudio()
startStopBtn.isEnabled = false
startStopBtn.setTitle("Start Recording", for: .normal)
} else {
startRecording()
startStopBtn.setTitle("Stop Recording", for: .normal)
}
}
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()
let 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.textView.text = result?.bestTranscription.formattedString
isFinal = (result?.isFinal)!
}
if error != nil || isFinal {
self.audioEngine.stop()
inputNode.removeTap(onBus: 0)
self.recognitionRequest = nil
self.recognitionTask = nil
self.startStopBtn.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.")
}
textView.text = "Say something, I'm listening!"
}
func speechRecognizer(_ speechRecognizer: SFSpeechRecognizer, availabilityDidChange available: Bool) {
if available {
startStopBtn.isEnabled = true
} else {
startStopBtn.isEnabled = false
}
}
}
谢谢:)
答案 0 :(得分:4)
为您的SpeechRecognizer设置一个var
而不是let
属性:
private var speechRecognizer = SFSpeechRecognizer(locale: Locale.init(identifier: "en-US"))
并在需要时进行更改:
speechRecognizer = SFSpeechRecognizer(locale: Locale.init(identifier: "fr-BE"))