One way of getting all tracks for an artist with the Cocoa Spotify API! Oh lawd ...

gistfile1.m

NSURL *artistUrl = [NSURL URLWithString:AebersoldSpotifyUri];
[SPArtistBrowse browseArtistAtURL:artistUrl inSession:[SPSession sharedSession] type:SP_ARTISTBROWSE_NO_TRACKS callback:^(SPArtistBrowse *artistBrowse) {
    [SPAsyncLoading waitUntilLoaded:artistBrowse timeout:10.0 then:^(NSArray *loaded, NSArray *notLoaded) {
        for(SPAlbum *a in artistBrowse.albums){
            [SPAlbumBrowse browseAlbumAtURL:a.spotifyURL inSession:[SPSession sharedSession] callback:^(SPAlbumBrowse *albumBrowse) {
                [SPAsyncLoading waitUntilLoaded:albumBrowse timeout:10.0 then:^(NSArray *loadedItems, NSArray *notLoadedItems) {
                    for(SPTrack *t in albumBrowse.tracks){
                        NSLog(@"%@",t);
                    }
                }];
            }];
        }
    }];

}];