3-CC_CALLBACK

bool HelloWorld::init()
{
    if ( !Scene::init() )
    {
        return false;
    }

    auto visibleSize = Director::getInstance()->getVisibleSize();
    Vec2 origin = Director::getInstance()->getVisibleOrigin();
//    auto newCall = CC_CALLBACK_1(HelloWorld::menuCloseCallback, this);//这句跟下面那句一个意思
    auto newCall = std::bind(&HelloWorld::menuCloseCallback, this, std::placeholders::_1);
    auto closeItem = MenuItemImage::create("HelloWorld.png","HelloWorld.png", newCall);
    float x = origin.x + visibleSize.width - closeItem->getContentSize().width/2;
    float y = origin.y + closeItem->getContentSize().height/2;
    closeItem->setPosition(Vec2(x,y));
    auto menu = Menu::create(closeItem, nullptr);
    menu->setPosition(Vec2(0, 0));
    this->addChild(menu);

    return true;
}

void HelloWorld::menuCloseCallback(Ref* pSender)
{
    log("ha");
}