How to remove CCNode from CCLayer

cocos2d-x C++
#1

simple question but not sure how to do it
i have 10 CCNodes added as child to the CCLayer
no i want to delete only specific ones .
how can i do it ? do i need to give each CCNode unique tag id
and then delete it by tag ?
or other way ?

#2

If you can get the object itself, then you can use obj -> removeFromParentAndCleanup(true).
If not, you must give them a tag, then remove by tag.

#3

Thanks for the replay , i did it but still i can i see the CCNode on the parent .
my final goul is to remove it from the CCLayer
this is my remove function
it takes CCArray with CCNodes and try’s to remove it

void GameLayer::removeGemsMatched(CCArray *&sameRowGemArray)
{
    CCLOG("%i",sameRowGemArray->count());
     CCObject *aGemIt = NULL;

    CCARRAY_FOREACH(sameRowGemArray,aGemIt)
    {
        Gem *aGem = static_cast(aGemIt);
        int gemTag = aGem->getTag();
        CCNode* parent = aGem->getParent();         
        if(parent != NULL)
        {
            this->removeChild(aGem);
            aGem->removeFromParentAndCleanup(true);
            aGem->release();
        }
    }
}

and this is where i create the CCNode:

void GameLayer::createGem(int row,int col,int zorder,int tagNum)
{

    Gem *thisGem = new Gem();   // Class That extend CCNode and contains CCSprit as member   
    thisGem->initWithGame(this,zorder);  
    thisGem->placeInGride();
    thisGem->retain();
    gemsDictionary.setObject(thisGem,gemID);
}

the CCNode class that adds the CCNode to the CCLayer

bool Gem::initWithGame(GameLayer* game,int zorder) {
        setGameLayer(game);
    game->addChild(this,zorder);     
    return true;
}

this is where i place it on the screen

void Gem::placeInGride()
{
    CCSpriteBatchNode *spriteBatchNode = (CCSpriteBatchNode*) getGameLayer()->getChildByTag(kSSheet);
    int gemSelect =(rand() % totalGemsAvailable) + 1;     
    char spritename[20];    
    sprintf(spritename,"gem%i_tranc.png",gemNum); 
    mySprite = CCSprite::createWithSpriteFrameName(spritename);
    spriteBatchNode->addChild(mySprite, 2);
    CCSize sSize = mySprite->getContentSize();
    setGemPosition(setPositionForGem(getRowNum(),getColNum(),sSize));

}