@interface ViewController () <SFSpeechRecognizerDelegate>@property (strong, nonatomic) UIButton *siriBtu;@property (strong, nonatomic) UITextView *siriTextView;@property (strong, nonatomic) SFSpeechRecognitionTask *recognitionTask;@property (strong, nonatomic)SFSpeechRecognizer *speechRecognizer;@property (strong, nonatomic) SFSpeechAudioBufferRecognitionRequest *recognitionRequest;@property (strong, nonatomic)AVAudioEngine *audioEngine;@end

- (void)viewDidLoad {[super viewDidLoad];NSLocale *cale = [[NSLocale alloc]initWithLocaleIdentifier:@"zh-CN"];self.speechRecognizer = [[SFSpeechRecognizer alloc]initWithLocale:cale];self.siriBtu.enabled = false;_speechRecognizer.delegate = self;[SFSpeechRecognizer requestAuthorization:^(SFSpeechRecognizerAuthorizationStatus status) {bool isButtonEnabled = false;switch (status) {case SFSpeechRecognizerAuthorizationStatusAuthorized:isButtonEnabled = true;NSLog(@"可以語音識別");break;case SFSpeechRecognizerAuthorizationStatusDenied:isButtonEnabled = false;NSLog(@"用戶被拒絕訪問語音識別");break;case SFSpeechRecognizerAuthorizationStatusRestricted:isButtonEnabled = false;NSLog(@"不能在該設備上進行語音識別");break;case SFSpeechRecognizerAuthorizationStatusNotDetermined:isButtonEnabled = false;NSLog(@"沒有授權語音識別");break;default:break;}self.siriBtu.enabled = isButtonEnabled;}];self.audioEngine = [[AVAudioEngine alloc]init];}

- (void)microphoneTap:(UIButton *)sender {if ([self.audioEngine isRunning]) {[self.audioEngine stop];[self.recognitionRequest endAudio];self.siriBtu.enabled = YES;[self.siriBtu setTitle:@"開始錄制" forState:UIControlStateNormal];}else{[self startRecording];[self.siriBtu setTitle:@"停止錄制" forState:UIControlStateNormal];}}

-(void)startRecording{if (self.recognitionTask) {[self.recognitionTask cancel];self.recognitionTask = nil;}AVAudioSession *audioSession = [AVAudioSession sharedInstance];bool audioBool = [audioSession setCategory:AVAudioSessionCategoryRecord error:nil];bool audioBool1= [audioSession setMode:AVAudioSessionModeMeasurement error:nil];bool audioBool2= [audioSession setActive:true withOptions:AVAudioSessionSetActiveOptionNotifyOthersOnDeactivation error:nil];if (audioBool || audioBool1|| audioBool2) {NSLog(@"可以使用");}else{NSLog(@"這里說明有的功能不支持");}self.recognitionRequest = [[SFSpeechAudioBufferRecognitionRequest alloc]init];AVAudioInputNode *inputNode = self.audioEngine.inputNode;SFSpeechAudioBufferRecognitionRequest *recognitionRequest;self.recognitionRequest.shouldReportPartialResults = true;self.recognitionTask = [self.speechRecognizer recognitionTaskWithRequest:self.recognitionRequest resultHandler:^(SFSpeechRecognitionResult * _Nullable result, NSError * _Nullable error) {bool isFinal = false;if (result) {self.siriTextView.text = [[result bestTranscription] formattedString];isFinal = [result isFinal];}if (error || isFinal) {[self.audioEngine stop];[inputNode removeTapOnBus:0];self.recognitionRequest = nil;self.recognitionTask = nil;self.siriBtu.enabled = true;}}];AVAudioFormat *recordingFormat = [inputNode outputFormatForBus:0];[inputNode installTapOnBus:0 bufferSize:1024 format:recordingFormat block:^(AVAudioPCMBuffer * _Nonnull buffer, AVAudioTime * _Nonnull when) {[self.recognitionRequest appendAudioPCMBuffer:buffer];}];[self.audioEngine prepare];bool audioEngineBool = [self.audioEngine startAndReturnError:nil];NSLog(@"%d",audioEngineBool);self.siriTextView.text = @"我是小冰！
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