cocos2dx 物理按键

auto listener = EventListenerKeyboard::create();    listener->onKeyReleased = [](EventKeyboard::KeyCode code, Event* event){        switch (code)        {            case EventKeyboard::KeyCode::KEY_BACK:  //回退键                Director::getInstance()->end(); break;            case EventKeyboard::KeyCode::KEY_MENU:  //菜单键                Director::getInstance()->end(); break;            default:                break;        }    };    Director::getInstance()->getEventDispatcher()->addEventListenerWithSceneGraphPriority(listener, this);