Question

I’m working With Game Center right now and I have a issue with GC.
When I’m using initWithPlayerIDs:, I don’t get any score when loadScoresWithCompletionHandler: callback is called.

GKLeaderboard *leaderBoard = [[[GKLeaderboard alloc] initWithPlayerIDs:[NSArray arrayWithObject:gcPlayerID]] autorelease];
leaderBoard.timeScope = GKLeaderboardTimeScopeAllTime;
leaderBoard.category = @"SomeLeaderboard";

[leaderBoard loadScoresWithCompletionHandler:  ^(NSArray *scores, NSError *error) {
 if (error == nil) 
 {
     // scores is null
     // ...
 }

But when I’m doing:

GKLeaderboard *leaderBoard = [[[GKLeaderboard alloc] init] autorelease];
leaderBoard.timeScope = GKLeaderboardTimeScopeAllTime;
leaderBoard.category = @"SomeLeaderboard";

[leaderBoard loadScoresWithCompletionHandler:  ^(NSArray *scores, NSError *error) {
 if (error == nil) 
 {
     for (GKScore* score in scores) 
        if ([score.playerID isEqualToString:gcPlayerID])
        {
            // Got something here
            return;
        }
 }

It’s working.

I’m using the 2nd method at the moment but it will make time to process if there is many score.

Does anyone have the same issue ?

Thanks.

Answer 1

I’m afraid that with the given info I don’t have an answer as to why initWithPlayerIDs: is not working. However, I might be able to simplify your filtering for the local player score in the 2nd method. A GKLeaderboard has a property localPlayerScore that is valid only after loadScoresWithCompletionHandler: has completed. localPlayerScore then gives the GKScore for the local player. Your 2nd method would then look like this:

[leaderBoard loadScoresWithCompletionHandler:^(NSArray *scores, NSError *error) {
    if (error == nil) 
    {
        GKScore* myScore = leaderboard.localPlayerScore; 
    }
 }

Hope this helps a little.