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);