Question

I am trying to submit a float of two decimal length to my Game Center leaderboard, however the only format allowed to submit with is int64_t. I am using the default Apple report score method:

- (void)reportScore:(int64_t)score forCategory:(NSString *)category {
    GKScore *scoreReporter = [[GKScore alloc] initWithCategory:category];   
    scoreReporter.value = score;
    [scoreReporter reportScoreWithCompletionHandler: ^(NSError *error) {
        [self callDelegateOnMainThread: @selector(scoreReported:) withArg: NULL error: error];
    }];
}

I am trying to use this method to provide the score to the report score method:

- (IBAction)increaseScore {
    self.currentScore = self.currentScore + 1;
    currentScoreLabel.text = [NSString stringWithFormat: @"%lld", self.currentScore];
    NSLog(@"%lld", self.currentScore);
}

Please help, I have been googling like crazy and cannot find the answer to this.

Answer 1

You can only submit 64 bit integers as scores to a leaderboard. From the documentation:

To Game Center, a score is just a
64-bit integer value reported by your
application. You are free to decide
what a score means, and how your
application calculates it. When you
are ready to add the leaderboard to
your application, you configure
leaderboards on iTunes Connect to tell
Game Center how a score should be
formatted and displayed to the player.
Further, you provide localized strings
so that the scores can be displayed
correctly in different languages. A
key advantage of configuring
leaderboards in iTunes Connect is that
the Game Center application can show
your game’s scores without you having
to write any code.

That doc page should tell you about formatting your score. It sounds like in order to display float-like scores you will have to tinker with the format settings in iTunes Connect.

Update

Try this for increaseScore:

- (IBAction) increaseScore {      
     self.currentScore = self.currentScore + 5; 
     float score = (float)self.currentScore / 100.0f;
     currentScoreLabel.text = [NSString stringWithFormat: @"%f", score]; 
     NSLog(@"%lld", self.currentScore);
}