Question

i need a little help, i currently have a method; updateTrackInfo in my Mac OS X application which gets the artist name, the track name and duration of the track currently being played in iTunes

However i want the app to listen for the distributed iTunes notification; com.apple.iTunes.playerInfo then call the method updateTrackInfo when ever the notification is distributed by iTunes. Please could someone help me, on what i would need to write in both the header and implementation file.

Thanks, Sami.

Answer 1

You’re looking for -[NSDistributedNotificationCenter addObserver:selector:name:object:]:

NSDistributedNotificationCenter *dnc = [NSDistributedNotificationCenter defaultCenter];
[dnc addObserver:self selector:@selector(updateTrackInfo:) name:@"com.apple.iTunes.playerInfo" object:nil];

Elsewhere in the same class…

- (void) updateTrackInfo:(NSNotification *)notification {
  NSDictionary *information = [notification userInfo];
  NSLog(@"track information: %@", information);
}

It even gives you a whole bunch of track information in the notification. Isn’t that nice?