Coding a Second Leaderboard - ios

Question

I am making a game in which the player can achieve a positive high score or a negative low score depending on the choices they make. The code that I've been using works great if there is only one leaderboard, but I'm having trouble when I try to add the second. TEHS is the leaderboard identifier for HighScore and TELS is the leaderboard identifier for LowScore.
I authenticate the local player:
-(void)authenticateLocalPlayer{
GKLocalPlayer *localPlayer = [GKLocalPlayer localPlayer];
localPlayer.authenticateHandler = ^(UIViewController *viewController, NSError *error){
if (viewController != nil) {
[self presentViewController:viewController animated:YES completion:nil];
}
else{
if ([GKLocalPlayer localPlayer].authenticated) {
_gameCenterEnabled = YES;
// Get the default leaderboard identifier.
[[GKLocalPlayer localPlayer] loadDefaultLeaderboardIdentifierWithCompletionHandler:^(NSString *leaderboardIdentifier, NSError *error) {
if (error != nil) {
NSLog(#"%#", [error localizedDescription]);
}
else{
TEHS = leaderboardidentifier;
}
}];
}
else{
_gameCenterEnabled = NO;
}
}
};
}
Scores are reported:
-(void)reportHighScore{
GKScore *highscore = [[GKScore alloc] initWithLeaderboardIdentifier:TEHS];
highscore.value = HighScoreNumber;
[GKScore reportScores:#[highscore] withCompletionHandler:^(NSError *error) {
if (error != nil) {
NSLog(#"%#", [error localizedDescription]);
}
}];
}
-(void)reportLowScore {
GKScore *lowscore = [[GKScore alloc] initWithLeaderboardIdentifier:TELS];
lowscore.value = LowScoreNumber;
[GKScore reportScores:#[lowscore] withCompletionHandler:^(NSError *error) {
if (error != nil) {
NSLog(#"%#", [error localizedDescription]);
}
}];
}
And, the leaderboards are shown when the player activates:
-(void)showLeaderboardAndAchievements:(BOOL)shouldShowLeaderboard{
GKGameCenterViewController *gcViewController = [[GKGameCenterViewController alloc] init];
gcViewController.gameCenterDelegate = self;
if (shouldShowLeaderboard) {
gcViewController.viewState = GKGameCenterViewControllerStateLeaderboards;
gcViewController.leaderboardIdentifier = TEHS;
}
else{
gcViewController.viewState = GKGameCenterViewControllerStateAchievements;
}
[self presentViewController:gcViewController animated:YES completion:nil];
}
Either reportLowScore or reportHighScore will work when I change
gcViewController.leaderboardIdentifier = TEHS;
and
TEHS = leaderboardidentifier;
to match their respective identifier. So, right now, this code works for High Score (TEHS), and if I changed the above two to TELS, Low Score would work. I'm just not quite sure what I need to do to authenticateLocalPlayer and showLeaderboardAndAchievements to get both leaderboards to work.

Answer 1

I have a game on the App Store that has two leaderboards, one for points and one for levels cleared. Instead of having one method for each leaderboard I made one method for submitting scores. Here is that method:
-(void) submitScore:(int64_t)score Leaderboard: (NSString*)leaderboard
{
//1: Check if Game Center
// features are enabled
if (!_gameCenterFeaturesEnabled) {
return;
}
//2: Create a GKScore object
GKScore* gkScore =
[[GKScore alloc]
initWithLeaderboardIdentifier:leaderboard];
//3: Set the score value
gkScore.value = score;
//4: Send the score to Game Center
[gkScore reportScoreWithCompletionHandler:
^(NSError* error) {
[self setLastError:error];
BOOL success = (error == nil);
if ([_delegate
respondsToSelector:
#selector(onScoresSubmitted:)]) {
[_delegate onScoresSubmitted:success];
}
}];
}
When you want to submit your high scores all you have to do is add something like:
[[GCHelper sharedGameKitHelper] submitScore:myLowScore Leaderboard:TELS];
[[GCHelper sharedGameKitHelper] submitScore:myHighScore Leaderboard:TEHS];
GCHelper is the class that contains my submitScore:Leaderboard: method.
To view your leaderboards or achievements within your app try this:
- (void) presentLeaderboards {
GKGameCenterViewController* gameCenterController = [[GKGameCenterViewController alloc] init];
gameCenterController.viewState = GKGameCenterViewControllerStateLeaderboards;
gameCenterController.gameCenterDelegate = self;
[self presentViewController:gameCenterController animated:YES completion:nil];
}
- (void) gameCenterViewControllerDidFinish:(GKGameCenterViewController*) gameCenterViewController {
[self dismissViewControllerAnimated:YES completion:nil];
}
- (void) presentAchievements {
GKGameCenterViewController* gameCenterController = [[GKGameCenterViewController alloc] init];
gameCenterController.viewState = GKGameCenterViewControllerStateAchievements;
gameCenterController.gameCenterDelegate = self;
I hope this answers your question!