GKScore必须包含初始值？

Question

I am getting a SIGABRT crash sometimes with the crash saying: A GKScore must contain an initialized value.

So it tracked it down to this line:

[localScore reportScoreWithCompletionHandler:^(NSError* error) {}];

And localStore is created like this:

GKScore* localScore = [scores objectForKey:category];

-- category comes from...

for (NSString* category in categories)

-- categories comes from...

[GKLeaderboard loadCategoriesWithCompletionHandler:^(NSArray *categories, NSArray *titles, NSError *error)

---

-(void) initScores
{
    NSString* libraryPath = [NSSearchPathForDirectoriesInDomains(NSLibraryDirectory, NSUserDomainMask, YES) objectAtIndex:0];
    NSString* file = [libraryPath stringByAppendingPathComponent:currentPlayerID];
    file = [file stringByAppendingString:kScoresFile];
    id object = [NSKeyedUnarchiver unarchiveObjectWithFile:file];

    if ([object isKindOfClass:[NSMutableDictionary class]])
    {
        NSMutableDictionary* loadedScores = (NSMutableDictionary*)object;
        scores = [[NSMutableDictionary alloc] initWithDictionary:loadedScores];
    }
    else
    {
        scores = [[NSMutableDictionary alloc] init];
    }

    //NSLog(@"scores initialized: %d", scores.count);
}

Sorry for all the code but pretty much all this code comes from this library's file: https://github.com/csddavies/DDGameKitHelper/blob/master/DDGameKitHelper.m

Anyway how would I fix this?

Thanks!!!

Answer 1

From the GameKit reference :

To report a score to Game Center, your game allocates and initializes a new object, sets the value property to the score the player earned, and then calls the reportScoreWithCompletionHandler: method.

Most likely it's complaining because you haven't set the value property, but it's also possible that you're missing the first step too -- ie it doesn't like you submitting GKScore objects that came from a leaderboard instead of ones you create yourself.