Google cloud speech API response : Parsing iOS

问题

I am trying to integrate google cloud speech API in my demo app. What I am getting as result is below :

    {
    results {
      alternatives {
        transcript: "hello"
      }
      stability: 0.01
    }
}

Code to get response :

[[SpeechRecognitionService sharedInstance] streamAudioData:self.audioData
                                                withCompletion:^(StreamingRecognizeResponse *response, NSError *error) {
                                                  if (error) {
                                                    NSLog(@"ERROR: %@", error);
                                                    _textView.text = [error localizedDescription];
                                                    [self stopAudio:nil];
                                                  } else if (response) {
                                                    BOOL finished = NO;
                                                    //NSLog(@"RESPONSE: %@", response.resultsArray);
                                                    for (StreamingRecognitionResult *result in response.resultsArray) {
                                                        NSLog(@"result : %@",result);
                                                        //_textView.text = result.alternatives.transcript;
                                                      if (result.isFinal) {
                                                        finished = YES;
                                                      }
                                                    }

                                                    if (finished) {
                                                      [self stopAudio:nil];
                                                    }
                                                  }
                                                }
     ];

My problem is, the response i am getting is not a proper JSON then how do i get the value of key transcript ? Any help would be appreciated. Thanks.

回答1:

For someone who is looking for this problem's solution :

for (StreamingRecognitionResult *result in response.resultsArray) {
                                                      for (StreamingRecognitionResult *alternative in result.alternativesArray) {
                                                        _textView.text = [NSString stringWithFormat:@"%@",[alternative valueForKey:@"transcript"]];
                                                      }
                                                      if (result.isFinal) {
                                                        finished = YES;
                                                      }
                                                    }

This is what i did to get the value for transcript continuously.

回答2:

Here's the code that will solve your problem on Swift4/iOS11.2.5, enjoy!:

SpeechRecognitionService.sharedInstance.streamAudioData(audioData, completion:
                { [weak self] (response, error) in
                    guard let strongSelf = self else {
                        return
                    }
                    if let error = error {
                        print("*** Streaming ASR ERROR: "+error.localizedDescription)
                    } else if let response = response {

                        for result in response.resultsArray {
                            print("result i: ")  //log to console
                            print(result)
                            if let alternative = result as? StreamingRecognitionResult {
                                for a in alternative.alternativesArray{
                                    if let ai = a as? SpeechRecognitionAlternative{
                                        print("alternative i: ")  //log to console
                                        print(ai)
                                        if(alternative.isFinal){
                                            print("*** FINAL ASR result: "+ai.transcript)
                                            strongSelf.stopGoogleStreamingASR(strongSelf)
                                        }
                                        else{
                                            print("*** PARTIAL ASR result: "+ai.transcript)
                                        }
                                    }
                                }

                            }
                            else{
                                print("ERROR: let alternative = result as? StreamingRecognitionResult")
                            }
                        }
                    }
            })

来源：https://stackoverflow.com/questions/42062099/google-cloud-speech-api-response-parsing-ios