通过SceneManager类更新我的HUD类

Question

我正在为大学做一个iPhone应用程序（游戏）。我正在访问HUD课程，因此我可以在游戏进行过程中更新标签。我有一个糟糕的架构吗？或者我该怎么做？

HUD班级

@implementation HUD
@synthesize statBar;
@synthesize levelText;
@synthesize label;
@synthesize level;

- (id) init {
    if((self = [super init])) {
        CGSize winSize = [[CCDirector sharedDirector] winSize];


        statBar = [CCSprite spriteWithFile:@"statbar.png"];
        statBar.position = ccp(winSize.width/2, winSize.height-10);

        levelText = [self createLevelText:10]; // testing purposes
        levelText.position = ccp(((winSize.width)-(winSize.width)+20), winSize.height-10);
        levelText.color = ccBLACK;

        [self addChild:statBar];
        [self addChild:levelText];
    }
    return self; // shouldnt reach this
}

- (CCLabelTTF *) createLevelText:(int)levelNo {
    level = [NSString stringWithFormat:@"LVL: %d", levelNo];

    label = [CCLabelTTF labelWithString:(NSString*) level fontName:@"CharlemagneStd-Bold.otf" fontSize:10];
    //[label setString:(NSString *) level];
    return label;
}

@end

ScreenManager类（相关代码）

CCLayer *hudLayer;
int hudTag;

+(void) goPlay
{
    hudLayer = [HUD node];
    CCLayer *playLayer = [PlayLayer node];
    hudTag = playLayer.tag;

    [SceneManager goWithHud: playLayer: hudLayer: hudTag];
}

+ (CCScene *) goWithHud:(CCLayer *) playLayer:(CCLayer *) hudLayer:(int)hudTag 
{
    CCDirector *director = [CCDirector sharedDirector];
    CCScene *newScene = [CCScene node];
    [newScene addChild: playLayer];
    [newScene addChild: hudLayer z:0 tag:hudTag];

    if([director runningScene])
        [director replaceScene:newScene];
    else 
        [director runWithScene:newScene];
    return newScene;
}

+(void)setScoreString:(int *)levelNo:(CCLayer *) hudLayer
{
    NSString *string = [NSString stringWithFormat:@"LVL: %d", levelNo];

    hudLayer.levelText = string;

}

-(void)updateScore
{
    HUD *obj = (HUD *)[self getChildByTag:hudTag];
    [obj setScoreString:@"100"];
}