coco2d-x CCDirector.h文件中变量*m_pNotificationNode*

/** This object will be visited after the main scene is visited.
This object MUST implement the "visit" selector.
Useful to hook a notification object, like CCNotifications
(http://github.com/manucorporat/CCNotifications)
@since v0.99.5
*/
CCNode* getNotificationNode();
void setNotificationNode(CCNode *node)

drawScene()

// Draw the Scene
void CCDirector::drawScene(void)
{
...
// draw the scene
if (m_pRunningScene)
{
m_pRunningScene->visit();
}

// draw the notifications node
if (m_pNotificationNode)
{
m_pNotificationNode->visit();
}

...
}