Proper way for Scene/Layer singletons?

cocos2d-x C++
#1

So I’m still a little lost on how to properly make singletons out of my main Scene/Layer (named GameScene, it derives from CCLayerColor).

I have a static function which returns a CCScene* named GetInstance and a static CCScene* variable for the GameScene:

// In the .h
static CCScene* GetInstance();

// In the .cpp
static CCScene* m_pGameSceneSingleton = NULL;

CCScene* GameScene::GetInstance()
{
    if(m_pGameSceneSingleton == NULL)
        m_pGameSceneSingleton = GameScene::scene();

    return m_pGameSceneSingleton;
}

Now, in the scene() function, everything is the same, but my question is, should I also make a static GameScene which would be the child so I can actually get the Layer in question?

For instance, have this

// In the .h
static CCScene* GetSceneInstance();
static GameScene* GetLayerInstance();

// In the .cpp
static CCScene* m_pGameSceneSingleton = NULL;
static GameScene* m_pGameSceneLayerSingleton = NULL;

CCScene* GameScene::GetSceneInstance()
{
    if(m_pGameSceneSingleton == NULL)
        m_pGameSceneSingleton = GameScene::scene();

    return m_pGameSceneSingleton;
}

GameScene* GameScene::GetLayerInstance()
{
    return m_pGameSceneLayerSingleton;
}

The only problem is I don’t know what to do about the scene() function considering in my AppDelegate.cpp I do:

pDirector->runWithScene(GameScene::GetSceneInstance());

So then what should this do to involve the singletons?

CCScene* GameScene::scene()
{
    // 'scene' is an autorelease object
    CCScene *scene = CCScene::node();

    // 'layer' is an autorelease object
    GameScene *layer = GameScene::node();

    // add layer as a child to scene
    scene->addChild(layer);

    // return the scene
    return scene;
}

Any help would be greatly appreciated. Examples would be even better.

#2

how to make cocos2d::scene class as singleton?
detailed code will be helpful
thank you

#3

Why do you need to do this?

#4

to manage multiple layers

#5

There is no need for a singleton here. Show us more of what you want to do so we can help.