Счет Game Center не публикуется

Я пытаюсь добавить счет в конце игры в Game Center, но он ничего не добавляет в Game Center. Я весь день ищу «ошибку», которую совершил, но ничего не вижу?

Вот немного кода, который я использую.

.h

#import <UIKit/UIKit.h>
#import <Foundation/Foundation.h>
#import <GameKit/GameKit.h>

@class GKLeaderboard, GKAchievement, GKPlayer;

int counter;

@protocol TopscoreDelegate <NSObject>
@optional
- (void) processGameCenterAuth: (NSError*) error;
- (void) scoreReported: (NSError*) error;
- (void) reloadScoresComplete: (GKLeaderboard*) leaderBoard error: (NSError*) error;
@end

@interface Topscore : UIViewController <NSObject> {

    AVAudioPlayer *audioPlayer;
    IBOutlet UILabel *count;
    Topscore* Topscore;
}

- (IBAction)tweetTapped:(id)sender;
- (IBAction) subScore;
- (IBAction) showLeader;
- (void) reportScore;

@property (nonatomic, assign)  id <TopscoreDelegate> delegate;

+ (BOOL) isGameCenterAvailable;
- (void) authenticateLocalUser;

@property (nonatomic, retain) Topscore *Topscore;
@property (nonatomic, retain) NSString* currentLeaderBoard;

@property (nonatomic, retain) UILabel *count;
@property(nonatomic, readonly, retain) NSDate *date;

- (void) reportScore: (int64_t) score forCategory: (NSString*) category;
- (void) reloadHighScoresForCategory: (NSString*) category;

@end

И файл .m выглядит так; у меня есть кнопка в файле xib, которая подключена к IBAction Subscore. я не получаю ошибок, а только несколько предупреждений.

PerformSelector may cause a leak because its selector is unknown

Это предупреждение на линии;

[делегат executeSelector: селектор withObject: аргумент withObject: err];

.m

@interface Topscore ()

@property (strong, nonatomic) NSString *imageString;
@property (strong, nonatomic) NSString *urlString;
- (void)clearLabels;
@end

@implementation Topscore

@synthesize count, date, urlString = _urlString, imageString = _imageString, delegate, Topscore, currentLeaderBoard;

- (void) callDelegate: (SEL) selector withArg: (id) arg error: (NSError*) err
{
    assert([NSThread isMainThread]);
    if([delegate respondsToSelector: selector])
    {
        if(arg != NULL)
        {
            [delegate performSelector: selector withObject: arg withObject: err];
        }
        else
        {
            [delegate performSelector: selector withObject: err];
        }
    }
    else
    {
        NSLog(@"Missed Method");
    }
}

- (void) callDelegateOnMainThread: (SEL) selector withArg: (id) arg error: (NSError*) err
{
    dispatch_async(dispatch_get_main_queue(), ^(void)
                   {
                       [self callDelegate: selector withArg: arg error: err];
                   });
}

//..

+ (BOOL) isGameCenterAvailable
{
    // check for presence of GKLocalPlayer API
    Class gcClass = (NSClassFromString(@"GKLocalPlayer"));

    // check if the device is running iOS 4.1 or later
    NSString *reqSysVer = @"4.1";
    NSString *currSysVer = [[UIDevice currentDevice] systemVersion];
    BOOL osVersionSupported = ([currSysVer compare:reqSysVer options:NSNumericSearch] != NSOrderedAscending);

    return (gcClass && osVersionSupported);
}

- (void) authenticateLocalUser
{
    if([GKLocalPlayer localPlayer].authenticated == NO)
    {
        [[GKLocalPlayer localPlayer] authenticateWithCompletionHandler:^(NSError *error) 
         {
             [self callDelegateOnMainThread: @selector(processGameCenterAuth:) withArg: NULL error: error];
         }];
    }
}

- (void) reloadHighScoresForCategory: (NSString*) category
{
    GKLeaderboard* leaderBoard= [[GKLeaderboard alloc] init];
    leaderBoard.category= category;
    leaderBoard.timeScope= GKLeaderboardTimeScopeAllTime;
    leaderBoard.range= NSMakeRange(1, 1);

    [leaderBoard loadScoresWithCompletionHandler:  ^(NSArray *scores, NSError *error)
     {
         [self callDelegateOnMainThread: @selector(reloadScoresComplete:error:) withArg: leaderBoard error: error];
     }];
}

//..

- (void) showAlertWithTitle: (NSString*) title message: (NSString*) message
{
    UIAlertView* alert= [[UIAlertView alloc] initWithTitle: title message: message 
                                                  delegate: NULL cancelButtonTitle: @"OK" otherButtonTitles: NULL];
    [alert show];

}

- (void) scoreReported: (NSError*) error;
{
    if(error == NULL)
    {
        [self.Topscore reloadHighScoresForCategory: self.currentLeaderBoard];
        [self showAlertWithTitle: @"High Score Reported!"
                         message: [NSString stringWithFormat: @"", [error localizedDescription]]];
    }
    else
    {
        [self showAlertWithTitle: @"Score Report Failed!"
                         message: [NSString stringWithFormat: @"Reason: %@", [error localizedDescription]]];
    }
}

- (IBAction) subScore {

    GKScore *scoreReporter = [[GKScore alloc] initWithCategory:@"01"];
   scoreReporter.value = counter;


    [scoreReporter reportScoreWithCompletionHandler:^(NSError *error) {
        if (error != nil)
        {
            NSLog(@"Failed: %i", counter);   
        } else {
            NSLog(@"Succes: %i", counter);  


            [self callDelegateOnMainThread: @selector(scoreReported:) withArg: NULL error: error];

        }
    }];

}

Пожалуйста, если вам нужно больше кода, просто спросите меня!

PS: Таблица лидеров отображается, но публикация/добавление результатов не добавляется после нажатия на кнопку (IBAction)