What dad are you trying to retrieve?

Thanx for replying.

Just the scores and users’ name

I just made a trial and added a function in your CocosHelperCPP. 

And now I’m finding the method using lambda callback function between CPP and OBJ-C.

If I fail I’ll reply for help again LOL.

Following is the code.

-( void ) gameCenterGetTopXScore:(int)number andLeaderboard: (NSString *)leaderboardID;

- ( void ) gameCenterGetTopXScore:(int)number andLeaderboard:(NSString *)leaderboardID

{

    GKLeaderboard *leaderboardRequest = [[GKLeaderboard alloc] init];

    if (leaderboardRequest != nil)

    {

        leaderboardRequest.playerScope = GKLeaderboardPlayerScopeGlobal;

        leaderboardRequest.timeScope = GKLeaderboardTimeScopeWeek;

        leaderboardRequest.range = NSMakeRange(1,number);

        leaderboardRequest.category = leaderboardID;

        [leaderboardRequest loadScoresWithCompletionHandler: ^(NSArray *scores, NSError *error) {

            if (error != nil){

                // handle the error.

                NSLog(@"Failed to download");

            }

            if (scores != nil){

                // process the score information.

                NSLog(@"Succeeded to download");

                NSArray *tempScore = [NSArray arrayWithArray:leaderboardRequest.scores];

                int * value = new int[number];

                std::string * nickName = new std::string[number];

                for (GKScore *obj in tempScore) {

                    int rank = (int)obj.rank-1;

                    value[rank] = (int)obj.value;

                    nickName[rank] = [obj.player.alias UTF8String];

                    NSLog(@"    rank                : %d",rank);

                    NSLog(@"    value               : %d",value[rank]);

                    NSLog(@"    name                : %s",nickName[rank].c_str());

                    NSLog(@"**************************************");

                }

            }

        }];

    }

}

What happens when you call that method?

Before the data download, there is a DOWNLOADING animation in the layer.

As the download complete, a custom leaderboard will appear.

So the callback is to show the leaderboard based on the downloaded data.

Do you get the desired data back?

Now I have solved my problem and just renamed the IOSHelper.m to IOSHelper.mm.

The final code:

- ( void ) gameCenterGetTopXScore:(int)number andLeaderboard:(NSString *)leaderboardID andCallback:(std::function<void(bool,int,int*,std::string*)> *) function

{

    GKLeaderboard *leaderboardRequest = [[GKLeaderboard alloc] init];

    if (leaderboardRequest != nil)

    {

        leaderboardRequest.playerScope = GKLeaderboardPlayerScopeGlobal;

        leaderboardRequest.timeScope = GKLeaderboardTimeScopeWeek;

        leaderboardRequest.range = NSMakeRange(1,number);

        leaderboardRequest.category = leaderboardID;

        [leaderboardRequest loadScoresWithCompletionHandler: ^(NSArray *scores, NSError *error) {

            if (error != nil){

                // handle the error.

                NSLog(@"Failed to download");

                if (function) (*function) (false, 0, nullptr, nullptr);

            }

            if (scores != nil){

                // process the score information.

                NSLog(@"Succeeded to download");

                NSArray *tempScore = [NSArray arrayWithArray:leaderboardRequest.scores];

                int * value = new int[number];

                std::string * nickName = new std::string[number];

                int n = 0;

                for (GKScore *obj in tempScore) {

                    n++;

                    int rank = (int)obj.rank-1;

                    value[rank] = (int)obj.value;

                    nickName[rank] = [obj.player.alias UTF8String];

                }

                if (function) (*function) (true, n, value, nickName);

            }

        }];

    }

}

Good to hear you solved it.