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    <p>Finally I found the solution:</p> <p>SAVE:</p> <pre><code> - (void) mediaPicker: (MPMediaPickerController *) mediaPicker didPickMediaItems: (MPMediaItemCollection *) mediaItemCollection { [self savePlaylist:mediaItemCollection]; [self dismissModalViewControllerAnimated: YES]; } - (void)savePlaylist:(MPMediaItemCollection *) mediaItemCollection { NSArray* items = [mediaItemCollection items]; NSMutableArray* listToSave = [[NSMutableArray alloc] initWithCapacity:0]; for (MPMediaItem *song in items) { NSNumber *persistentId = [song valueForProperty:MPMediaItemPropertyPersistentID]; [listToSave addObject:persistentId]; } NSData *data = [NSKeyedArchiver archivedDataWithRootObject: listToSave]; [[NSUserDefaults standardUserDefaults] setObject:data forKey:@"songsList"]; [[NSUserDefaults standardUserDefaults] synchronize]; [listToSave release]; } </code></pre> <p>LOAD</p> <pre><code>- (void)setupMusic { myPlayer = [MPMusicPlayerController applicationMusicPlayer]; if ([[NSUserDefaults standardUserDefaults] objectForKey:@"songsList"] != nil) { NSMutableArray *theList = [[NSMutableArray alloc] initWithCapacity:0]; NSData *data = [[NSUserDefaults standardUserDefaults] objectForKey:@"songsList"]; NSArray *decodedData = [NSKeyedUnarchiver unarchiveObjectWithData:data]; [theList addObjectsFromArray:decodedData]; NSMutableArray *allTheSongs = [[NSMutableArray alloc] initWithCapacity:0]; for (int i = 0; i &lt; [theList count]; i++) { MPMediaQuery *songQuery = [MPMediaQuery songsQuery]; [songQuery addFilterPredicate:[MPMediaPropertyPredicate predicateWithValue:[theList objectAtIndex:i] forProperty:MPMediaItemPropertyPersistentID]]; NSArray *songs = [songQuery items]; [allTheSongs addObjectsFromArray: songs]; } MPMediaItemCollection *currentQueue = [[MPMediaItemCollection alloc] initWithItems:allTheSongs]; [myPlayer setQueueWithItemCollection:currentQueue]; [theList release]; [currentQueue release]; [allTheSongs release]; } else { [myPlayer setQueueWithQuery: [MPMediaQuery songsQuery]]; [myPlayer setShuffleMode: MPMusicShuffleModeSongs]; //optional } } </code></pre>
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