Retrieve scores of two friends above GKLocalPlayer - iphone

Question

I want to show a very small leaderboard snippet on my games front page, basically showing your score and the scores of two friends around you (above and below you're score). I have read through the apple documentation and cannot see a way to do this unless I specify all friends and specify a huge range to ensure I get all the friends, which I can then filter. It seems inefficient to retrieve this list especially as the user may be on mobile. How can I achieve what I want without downloading the entire list of friends and then filtering?
Here is what I currently have (without filtering)
GKLeaderboard *leaderboardRequest = [[GKLeaderboard alloc] init];
if (leaderboardRequest != nil)
{
leaderboardRequest.playerScope = GKLeaderboardPlayerScopeFriendsOnly;
leaderboardRequest.timeScope = GKLeaderboardTimeScopeAllTime;
leaderboardRequest.category = #"HighScore";
leaderboardRequest.range = NSMakeRange(1,100);
[leaderboardRequest loadScoresWithCompletionHandler: ^(NSArray *scores, NSError *error) {
if (error != nil)
{
// Handle the error.
}
if (scores != nil)
{
GKScore* myScore = leaderboardRequest.localPlayerScore;
NSLog(#"Me: %#: %d",myScore.playerID, (int)myScore.value);
// Process the score information - here I would filter
for (GKScore* score in scores)
{
NSLog(#"%#: %d",score.playerID, (int)score.value);
}
}
}];
}

Answer 1

The following code may help you.
From Game Center Programming Guide:
GKLeaderboard range: You can pick scores within a specific range. For example, the range [1,10] returns the best ten scores found by the query.
GKScore rank: The position of the score in the results of a leaderboard search.
ps. I couldn't test it.
Best regards.
GKLeaderboard *leaderboardRequest = [[GKLeaderboard alloc] init];
if (leaderboardRequest != nil)
{
GKScore* myScore = leaderboardRequest.localPlayerScore;
leaderboardRequest.playerScope = GKLeaderboardPlayerScopeFriendsOnly;
leaderboardRequest.timeScope = GKLeaderboardTimeScopeAllTime;
leaderboardRequest.category = #"HighScore";
leaderboardRequest.range = NSMakeRange(myScore.rank-1, myScore.rank+1);
[leaderboardRequest loadScoresWithCompletionHandler: ^(NSArray *scores, NSError *error) {
if (error != nil)
{
// Handle the error.
}
else
{
// ...
}
}];
}