Hi,

I'm learning cocoa/objective-c. Right now I'm dealing with key/value coding. After reading Aaron's book and other sources, I thought that I was able to left the simple examples and try a complex one...

I'm trying read iTunes property list (iTunes Music Library.xml). I would like to retrieve the tracks held by an specific playlist.

Probably everybody knows it, but bellow I put a piece of the xml:

<plist version="1.0">
<dict>
   <key>Major Version</key><integer>1</integer>
   ...
   <key>Playlists</key>
   <array>
      <dict>
         <key>Name</key><string>Library</string>
         ...
         <key>Playlist Items</key>
         <array>
            <dict>
               <key>Track ID</key><integer>10281</integer>
            </dict>
            ...
         </array>
      </dict>
      <dict>
         ...
      </dict>
   </array>
</dict>
</plist>

As you can see, the playlists are stored as dictionaries inside an array, and the key that identifies it is inside it, not as a <key> preceding it.

The problem is that I'm not able to figure out how to search for a key that is inside another one.

With the following code I can find the the array in which the playlists are stored, but how to find an specific <dict>?

NSDictionary *rootDict = [[NSDictionary alloc] initWithContentsOfFile:file];
NSArray *playlists = [rootDict objectForKey:@"Playlists"];

Here at Stackoverflow I found this post, but I'm not sure if iterate over the array and test it is a good idea.

I'm quite sure that I could use valueForKeyPath, but I'm unable to figure out how to do it.

Any help is welcome.

TIA,

Bob