将录音转为文字

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@interface ViewController ()<SFSpeechRecognizerDelegate>
 
@property (weak, nonatomic) IBOutlet UILabel *textLabel;
 
@property (weak, nonatomic) IBOutlet UIButton *recordButton;
 
@property (strong, nonatomic) SFSpeechRecognitionTask *recognitionTask;
 
@property (strong, nonatomic)SFSpeechRecognizer *speechRecognizer;
 
@property (strong, nonatomic) SFSpeechAudioBufferRecognitionRequest *recognitionRequest;
 
@property (strong, nonatomic)AVAudioEngine *audioEngine;
 
@end
 
//点击录音按钮
 
- (IBAction)startRecord:(id)sender {
 
if ([self.audioEngine isRunning]) {
 
 
 
[self.audioEngine stop];
 
 
 
[self.recognitionRequest endAudio];
 
 
 
self.recordButton.enabled = YES;
 
 
 
[self.recordButton setTitle:@"开始录制" forState:UIControlStateNormal];
 
 
 
}else{
 
 
 
[self startRecording];
 
 
 
[self.recordButton setTitle:@"停止录制" 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(@"这里说明有的功能不支持");
 
 
 
}
 
 
 
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.textLabel.text = [[result bestTranscription] formattedString];
 
 
 
isFinal = [result isFinal];
 
 
 
}
 
 
 
if (error || isFinal) {
 
 
 
[self.audioEngine stop];
 
 
 
[inputNode removeTapOnBus:0];
 
 
 
self.recognitionRequest = nil;
 
 
 
self.recognitionTask = nil;
 
 
 
self.recordButton.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.textLabel.text = @"我是小冰!:grinning:Siri 冰,你说我听";
 
}
 
-(void)speechRecognizer:(SFSpeechRecognizer *)speechRecognizer availabilityDidChange:(BOOL)available{
 
 
 
if(available){
 
 
 
self.recordButton.enabled = true;
 
 
 
}else{
 
 
 
self.recordButton.enabled = false;
 
 
 
}
 
 
 
}
 
- (void)viewDidLoad {
 
[super viewDidLoad];
 
NSLocale *cale = [[NSLocale alloc]initWithLocaleIdentifier:@"zh-CN"];
 
 
 
self.speechRecognizer = [[SFSpeechRecognizer alloc]initWithLocale:cale];
 
self.recordButton.enabled = NO;
 
self.speechRecognizer.delegate = self;
 
[SFSpeechRecognizer requestAuthorization:^(SFSpeechRecognizerAuthorizationStatus status) {
 
BOOL isButtonEnabled = NO;
 
switch (status) {
 
case SFSpeechRecognizerAuthorizationStatusAuthorized:
 
isButtonEnabled = YES;
 
break;
 
case SFSpeechRecognizerAuthorizationStatusDenied:
 
isButtonEnabled = NO;
 
break;
 
case SFSpeechRecognizerAuthorizationStatusRestricted:
 
isButtonEnabled = NO;
 
break;
 
case SFSpeechRecognizerAuthorizationStatusNotDetermined:
 
isButtonEnabled = NO;
 
break;
 
default:
 
break;
 
}
 
dispatch_async(dispatch_get_main_queue(), ^{
 
self.recordButton.enabled = isButtonEnabled;
 
 
 
});
 
 
 
}];
 
 
 
self.audioEngine = [[AVAudioEngine alloc]init];
 
 
 
 
 
}

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