Google cloud speech API response : Parsing iOS

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.

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.