Adding NSMutableDictonary to NSMutableArray but objects being replaced

Question

How come whenever I add a new object NSMutableDictionay to my NSMutableArray it replaces my previous object?

For example:

[appDelegate.tracksDict setObject:currentTrackTitle forKey:@"track_title"];
[appDelegate.tracksDict setObject:currentTrackTopic forKey:@"topic"];
[appDelegate.tracksArray addObject:[appDelegate.tracksDict copy]];

Its printing...

2010-10-01 14:03:35.021 XML[48889:207]Tracks Array: {
    topic = "Cold Calling";
    "track_title" = "Sleeping and selling";
}
2010-10-01 14:03:35.021 XML[48889:207]Tracks Array: {
    topic = "Gate Keeper";
    "track_title" = "Selling like a chicken";
}
2010-10-01 14:03:35.021 XML[48889:207]Tracks Array: {
    topic = "Gate Keeper";
    "track_title" = "Don't you try to sell";
}

Instead of something like...

2010-10-01 14:03:35.021 XML[48889:207]Tracks Array: {
    topic = "Cold Calling";
    track_title = "Sleeping and selling";

    topic = "Gate Keeper";
    track_title = "Selling like a chicken";

    topic = "Gate Keeper";
    track_title = "Selling like a chicken";
}

I'm sure its something stupid since I don't know the language very well.

Answer 1

Your question is hard to follow based on the "print" you posted, but it sounds like you want an NSArray of NSDictionary objects. NSDictionary can only hold a single object for a given key but can have (virtually) unlimited keys. It looks like what you need is to build an array of dictionaries, one per track.