更新：

Question

我目前正以下列方式检索我的排行榜前100名得分：

- (void) retrieveTop100Scores {

__block int totalScore = 0;

GKLeaderboard *myLB = [[GKLeaderboard alloc] init];
myLB.identifier = [Team currentTeam];
myLB.timeScope = GKLeaderboardTimeScopeAllTime;
myLB.playerScope = GKLeaderboardPlayerScopeGlobal;
myLB.range = NSMakeRange(1, 100);

[myLB loadScoresWithCompletionHandler:^(NSArray *scores, NSError *error) {
    if (error != nil) {

        NSLog(@"%@", [error localizedDescription]);
    }

    if (scores != nil) {

        for (GKScore *score in scores) {

            NSLog(@"%lld", score.value);

            totalScore += score.value;

        }

        NSLog(@"Total Score: %d", totalScore);
        [self loadingDidEnd];
    }
}];

}

问题是我想为32个排行榜做这个。我有一个包含所有32个排行榜标识符的数组：

NSArray *leaderboardIDs;

所以我的问题是，如何将这两段代码组合起来为每个排行榜提取100个值，从而生成一个包含所有排行榜名称作为键的字典，以及总计（每100个）得分的排行榜。

更新：

所以我使用CrimsonChris的帮助更新了我的答案。我唯一的问题是，我怎么知道所有32支球队的得分总和是什么时候？我问的原因是因为我想从最高到最低组织它们，并在tableView中按顺序显示它们。

这是我更新了我的答案：

在我的viewDidLoad中：

- (void)loadLeaderboardData {

// Array of leaderboard ID's to get high scores for
NSArray *leaderboardIDs = @[@"algeria", @"argentina", @"australia", @"belgium", @"bosniaandherzegovina", @"brazil", @"cameroon", @"chile", @"colombia", @"costarica", @"croatia", @"ecuador", @"england", @"france", @"germany", @"ghana", @"greece", @"honduras", @"iran", @"italy", @"ivorycoast", @"japan", @"mexico", @"netherlands", @"nigeria", @"portugal", @"russia", @"southkorea", @"spain", @"switzerland", @"unitedstates", @"uruguay"];

    scoresByLeaderboardID = [NSMutableDictionary dictionary];
    __block int requestCount = (int)leaderboardIDs.count;
    for (NSString *leaderboardID in leaderboardIDs) {
        [self loadScoresForLeaderboardID:leaderboardID range:NSMakeRange(1, 100) callback:^(NSArray *scores) {
            scoresByLeaderboardID[leaderboardID] = scores;
            if (--requestCount <= 0) { 
                if (callback)callback(scoresByLeaderboardID);
            }
        }];
    }
}



- (void)loadScoresForLeaderboardID:(NSString*)leaderboardID range:(NSRange)range callback:(CallbackBlock)callback {

__block int totalScore = 0;

GKLeaderboard *myLB = [[GKLeaderboard alloc] init];
myLB.identifier = leaderboardID;
myLB.timeScope = GKLeaderboardTimeScopeAllTime;
myLB.playerScope = GKLeaderboardPlayerScopeGlobal;
myLB.range = range;

[myLB loadScoresWithCompletionHandler:^(NSArray *scores, NSError *error) {
    if (error != nil) {
        //NSLog(@"%@", [error localizedDescription]);
    }

    if (scores != nil) {
        for (GKScore *score in scores) {
            //NSLog(@"Individual Scores: %lld (For %@)", score.value, leaderboardID);
        }

    }
}];
}

Answer 1

可以使用回调块清理您的方法。

typedef void(^CallbackBlock)(id object);

//callback accepts an NSArray* of GKScore*
- (void)loadScoresForLeaderboardID:(NSString *)leaderboardID range:(NSRange)range callback:(CallbackBlock)callback {
    GKLeaderboard *myLB = [[GKLeaderboard alloc] init];
    myLB.identifier = leaderboardID;
    myLB.timeScope = GKLeaderboardTimeScopeAllTime;
    myLB.playerScope = GKLeaderboardPlayerScopeGlobal;
    myLB.range = range;

    [myLB loadScoresWithCompletionHandler:^(NSArray *scores, NSError *error) {
        if (error != nil) NSLog(@"%@", [error localizedDescription]);
        if (callback) callback(scores);
    }];
}

然后，您可以遍历排行榜。

//callback accepts an NSDictionary* of NSArray*(of GKScore*) by NSNumber*
- (void)loadScoresForLeaderboardIDs:(NSArray *)leaderboardIDs withCallback:(CallbackBlock)callback { 
    NSMutableDictionary *scoresByLeaderboardID = [NSMutableDictionary dictionary];
    __block int requestCount = leaderboardIDs.count;
    for (NSString *leaderboardID in leaderboardIDs) {
        [LeaderboardLoader loadScoresForLeaderboardID:leaderboardID range:NSMakeRange(1, 100) callback:^(NSArray *scores) {
            scoresByLeaderboardID[leaderboardID] = scores;
            if (--requestCount <= 0) { //not thread safe
                if (callback) callback(scoresByLeaderboardID);
            }
        }];
    }
}

一旦此方法触发其回调，您应该获得所有分数。

[LeaderboardLoader loadScoresForLeaderboardIDs:@[@"FirstID", @"SecondID", @"ThirdID"] withCallback:^(NSDictionary *scoresByLeaderboardID) {
    NSLog(@"%@", scoresByLeaderboardID);
    //do whatever you need to with all your scores here.
}];

iOS：没有调用方法32次的最佳方法吗？

更新：

1 个答案: