来自GKLeaderboard loadScoresWithCompletionHandler的NSURLErrorDomain代码= -1005：

Question

I am receiving the following error in a callback to loadScoresWithCompletionHandler:

Error Domain=NSURLErrorDomain Code=-1005 
"The operation couldn’t be completed. (NSURLErrorDomain error -1005.)"

Other calls to Game Center both before and afterwards succeed. (They operate on various threads). If have initialized the leaderboard request as follows:

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

leaderboard.identifier  = leaderboardIdentifier; // valid identifier
leaderboard.playerScope = GKLeaderboardPlayerScopeFriendsOnly;
leaderboard.range       = NSMakeRange(1, 100); // max. allowed range.
leaderboard.timeScope   = GKLeaderboardTimeScopeAllTime;

[leaderboard loadScoresWithCompletionHandler:^(NSArray *scores, NSError *error) {
    // ...
}];

What is going on here and how can I overcome this problem?

The calls to loadScoresWithCompletionHandler: are made from an operation on an NSOperationQueue whose task it is to issue requests for scores (I am interested in each localPlayerScore ) to several leaderboards and wait for all responses. The first response already carries the error.

UPDATE -1005 denotes kCFURLErrorNetworkConnectionLost ; the underlying cause is still unclear.

UPDATE If I send only a single request (instead of as so far typically 6 in parallel) I receive error NSURLErrorDomain -1001, which denotes kCFURLErrorTimedOut , or GKErrorDomain 3 ...

Answer 1

For some reason this alternative call does not lead to errors:

GKLeaderboard *leaderboard = 
    [[GKLeaderboard alloc] initWithPlayers:@[ GKLocalPlayer.localPlayer ]];

leaderboard.identifier = leaderboardIdentifier;
leaderboard.timeScope  = GKLeaderboardTimeScopeAllTime;

[leaderboard loadScoresWithCompletionHandler:^(NSArray *scores, NSError *error) {
    // ...
}];

Problem solved.