#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
-(BOOL)isAudioInputAvailable{
  //after iOS 6.0
  if ([[AVAudioSession sharedInstance] respondesToSelector:@selector(inputIsAvailable)]) {
    BOOL inputAvailable = [[AVAudioSession sharedInstance] inputIsAvailable];
    return inputAvailable;
  }

  //before iOS 6.0, This is Deprecated since iOS7
  AudioSessionInitialize(NULL, NULL, NULL, NULL);
  UInt32 propertySize, inputAvailable;
  AudioSessionGetProperty(kAudioSessionProperty_AudioInputAvailable, &propertySize, &inputAvailable);
  return (BOOL)inputAvailable;
}
#pragma GCC diagnostic pop