cocos2d-x 3.2版本 如何响应手机返回按键

Cocos2d-x
#1

keyEvent 里面 哪个按钮才是手机返回按键啊。。。 求解

cocos2d-x 3.2版本的。

#2

EventKeyboard::KeyCode::KEY_ESCAPE

#3

在要监听的Scene的init方法中添加一下代码：

auto listener = EventListenerKeyboard::create();
listener->onKeyReleased =&](EventKeyboard::KeyCode keyCode, Event* event)
{
    //不同手机的keycode可能不一样，为了安全全写了
    if(EventKeyboard::KeyCode::KEY_RETURN == keyCode || EventKeyboard::KeyCode::KEY_ESCAPE == keyCode || EventKeyboard::KeyCode::KEY_BACKSPACE == keyCode)
    {
        Director::getInstance()->end();
        #if (CC_TARGET_PLATFORM == CC_PLATFORM_IOS)
        exit(0);
        #endif
    }
};
this->getEventDispatcher()->addEventListenerWithSceneGraphPriority(listener, this);