[英]Swift SFSpeechRecognizer not working twice
這是我第一次在 Swift 中使用 SFSpeechRecognizer 並且有一個功能不起作用。 當我按下按鈕audioButtonPressed
,它似乎開始識別正常,再次按下它會停止。 當我嘗試再次按下它以再次開始識別時,識別不起作用並讓我看到空白文本視圖。 我該怎么做?
這是我的代碼
@IBAction func audioButtonPressed(_ sender: Any) {
if isRecording {
stopRecording()
delegate?.speechRecognitionComplete(query: query)
audioButton.backgroundColor = UIColor.red
isRecording = false
} else {
startRecording()
audioButton.backgroundColor = UIColor.green
isRecording = true
}
}
func stopRecording() {
audioEngine.stop()
audioEngine.inputNode?.removeTap(onBus: 0)
recognitionRequest = nil
recognitionTask = nil
}
func startRecording() {
recognitionRequest = SFSpeechAudioBufferRecognitionRequest()
guard let recognitionRequest = recognitionRequest else {
return
}
recognitionRequest.shouldReportPartialResults = true
recognitionTask = speechRecognizer?.recognitionTask(with: recognitionRequest, resultHandler: { (result, error) in
var isFinal = false
if result != nil {
self.query = result?.bestTranscription.formattedString
self.audioTextField.text = self.query
isFinal = (result?.isFinal)!
}
if error != nil || isFinal {
self.stopRecording()
}
})
let audioSession = AVAudioSession.sharedInstance()
do {
try audioSession.setCategory(AVAudioSessionCategoryRecord)
try audioSession.setMode(AVAudioSessionModeMeasurement)
try audioSession.setActive(true, with: .notifyOthersOnDeactivation)
} catch {
print("the audio session isn't configured correctly")
}
let recordingFormat = audioEngine.inputNode?.outputFormat(forBus: 0)
audioEngine.inputNode?.installTap(onBus: 0, bufferSize: 1024, format: recordingFormat) { (buffer, time) in
self.recognitionRequest?.append(buffer)
}
audioEngine.prepare()
do {
try audioEngine.start()
audioTextField.text = "How may I help you"
} catch {
print("audio engine failed to start")
}
}
當我第一次按下音頻按鈕時,開始錄音被調用並且它工作正常,再次按下它停止錄音被調用並且工作正常,但是再次按下不會使識別再次開始......想法?
我認為在 stopRecording 函數中釋放任務之前,您錯過了knowledgeTask.cancel recognitionTask.cancel()
。
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