1
我不知道爲什麼我有這個錯誤。我得到的錯誤是AVSpeechRecognizer：所需條件爲false：_recordingTap ==無錯誤Swift3
終止應用程序由於未捕獲的異常 'com.apple.coreaudio.avfaudio'，理由是： '要求的條件是假的：_recordingTap ==零'
UPDATE
實際上，這種方式很有效，但幾次後，突然按鈕被禁用，話筒不再起作用。然後它會導致錯誤並崩潰。
你能幫我解決嗎？
class ViewController: UIViewController, SFSpeechRecognizerDelegate, UITextViewDelegate, AVSpeechSynthesizerDelegate {
@IBOutlet weak var myTextView: 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()
var rightButton = UIBarButtonItem()
override func viewDidLoad() {
super.viewDidLoad()
microphoneButton.isEnabled = false
speechRecognizer.delegate = self
speechRecognizerFunc()
myTextView.delegate = self
myTextView.isUserInteractionEnabled = false
}
@IBAction func cancelButton(_ sender: UIBarButtonItem) {
self.dismiss(animated: true, completion: nil)
}
func speechRecognizerFunc(){
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", for: .normal)
myTextView.text = ""
} else {
myTextView.text = "Say something. I'm listening...."
startRecording()
microphoneButton.setTitle("Stop", for: .normal)
}
}
func startRecording() {
if recognitionTask != nil {
recognitionTask?.cancel()
recognitionTask = nil
}
let audioSession = AVAudioSession.sharedInstance()
do {
try audioSession.setCategory(AVAudioSessionCategoryPlayAndRecord, with: .defaultToSpeaker)
try audioSession.setMode(AVAudioSessionModeMeasurement)
try audioSession.setActive(true, with: .notifyOthersOnDeactivation)
} catch {
print("audioSession properties weren't set because of an error.")
}
recognitionRequest = SFSpeechAudioBufferRecognitionRequest()
guard let inputNode = audioEngine.inputNode else {
fatalError("Audio engine has no input node")
}
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.myTextView.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.microphoneButton.isEnabled = true
self.performSegue(withIdentifier: "nv", sender: nil)
}
})
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
}
}
func popUpAlert(title: String, msg: String){
let alert = UIAlertController(title: title, message: msg, preferredStyle: .alert)
let okay = UIAlertAction(title: "Okay", style: .default, handler: nil)
alert.addAction(okay)
self.present(alert, animated: true, completion: nil)
}
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if segue.identifier == "nv" {
let vc = segue.destination as! SpeechTableViewController
vc.text = self.myTextView.text
print("ViewControoler: text value: \(textValue)")
}
}
}
檢查你的輸入節點if inputnote！= nill –