Communicating with React Native app

MediaController.m

-(void) mediaPicker:(MPMediaPickerController *)mediaPicker didPickMediaItems:(MPMediaItemCollection *)mediaItemCollection {
  MPMediaItem *mediaItem = mediaItemCollection.items[0];
  NSURL *assetURL = [mediaItem valueForProperty:MPMediaItemPropertyAssetURL];
  
  [self.bridge.eventDispatcher sendAppEventWithName:@"SongPlaying" body:[mediaItem valueForProperty:MPMediaItemPropertyTitle]];
  //...
}