cocos2d tiled at

    CCTMXTiledMap *map=CCTMXTiledMap::create("4.tmx");
    addChild(map);
    //CCSize s=map->getContentSize();

    //fight juchi
    CCArray* pChildrenArray=map->getChildren();
    CCSpriteBatchNode* child=NULL;
    CCObject* pObject=NULL;
    CCARRAY_FOREACH(pChildrenArray,pObject)
    {

        child=(CCSpriteBatchNode*)pObject;
        if(!child)
        {
            break;
        }
        child->getTexture()->setAntiAliasTexParameters();
    }

    CCTMXLayer*  layer=map->layerNamed("Layer 0");
    CCSize s=layer->getLayerSize();

    CCSprite* sprite;
    sprite=layer->tileAt(ccp(0,0));
    sprite->setScale(2);
    sprite=layer->tileAt(ccp(s.width-1,0));
    sprite->setScale(2);
    sprite=layer->tileAt(ccp(0,s.height-1));
    sprite->setScale(2);
    sprite=layer->tileAt(ccp(s.width-1,s.height-1));
    sprite->setScale(2);