MPNowPlayingInfoCenter setting

extracted.m

- (void)reflectNowPlaying
{
  if (_activeTrack == nil)
    return;
  
  NSMutableDictionary *activeInfo = [[NSMutableDictionary alloc] initWithDictionary:[[MPNowPlayingInfoCenter defaultCenter] nowPlayingInfo]];
  
  if (artworkNeedsReflecting || metaNeedsReflecting)
  {
    [activeInfo setObject:[_activeTrack title] forKey:MPMediaItemPropertyTitle];
    [activeInfo setObject:[_activeTrack artistTitle] forKey:MPMediaItemPropertyArtist];
    [activeInfo setObject:[_activeTrack duration] forKey:MPMediaItemPropertyPlaybackDuration];
    [activeInfo removeObjectForKey:MPMediaItemPropertyArtwork];
    
    metaNeedsReflecting = NO;
  }
  
  if (_currentTiming != nil)
    [activeInfo setObject:_currentTiming forKey:MPNowPlayingInfoPropertyElapsedPlaybackTime];
  
  if (_activeArtwork != nil && artworkNeedsReflecting)
  {
    [activeInfo setObject:_activeArtwork forKey:MPMediaItemPropertyArtwork];
    artworkNeedsReflecting = NO;
  }
  
  [[MPNowPlayingInfoCenter defaultCenter] setNowPlayingInfo:activeInfo];
}