iphone - Wait until GameCenter score download id complete -

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i download score gamecenter, don't know how wait, when score downloaded. when run code, returns null. think, method have wait when [leaderboardrequest loadscoreswithcompletionhandler: ... have score downloaded.

- (nsstring*) getscore: (nsstring*) leaderboardid {     __block nsstring *score = nil;     gkleaderboard *leaderboardrequest = [[gkleaderboard alloc] init];     if (leaderboardrequest != nil)     {         leaderboardrequest.identifier = leaderboardid;         [leaderboardrequest loadscoreswithcompletionhandler: ^(nsarray *scores, nserror *error) {             if (error != nil)             {                 nslog(@"%@", [error localizeddescription]);             }             if (scores != nil)             {                 int64_t scoreint = leaderboardrequest.localplayerscore.value;                 score = [nsstring stringwithformat:@"%lld", scoreint];              }         }];     }     return score; }

the code completion handler called when operation complete (on thread).

you have several options there, can store score somewhere , post notification notify main thread operation completed.


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