1、参考文章  http://blog.csdn.net/vanquishedzxl/article/details/23616535

1. class HelloWorld : public cocos2d::CCLayer  
2. {  
3. public:  
4.     virtual bool init();    
5.     static cocos2d::CCScene* scene();  
6.     void  sengMsg(CCObject *pSender);  
7.     void testMSG(CCObject *pSender);  
8.     CREATE_FUNC(HelloWorld);  
9. }; 

1. bool HelloWorld::init()  
2. {  
3.     bool bRet = false;  
4.     do   
5.     {  
6.         //////////////////////////////////////////////////////////////////////////  
7.         // super init first  
8.         //////////////////////////////////////////////////////////////////////////  
9.   
10.         CC_BREAK_IF(! CCLayer::init());  
11.         CCNotificationCenter::sharedNotificationCenter()->addObserver(this,callfuncO_selector(HelloWorld::testMSG),"test",NULL);  
12.         CCMenuItemLabel *labelItem = CCMenuItemLabel::create(CCLabelTTF::create("Send MSG","Arial",26),this,menu_selector(HelloWorld::sengMsg));  
13.         CCMenu *menu = CCMenu::create(labelItem,NULL);  
14.         this->addChild(menu);  
15.         bRet = true;  
16.     } while (0);  
17.   
18.     return bRet;  
19. }  
20. void HelloWorld::sengMsg(CCObject *pSender)  
21. {  
22.     CCLOG("sendMSG");  
23.     CCNotificationCenter::sharedNotificationCenter()->postNotification("test",NULL);  
24. }  
25. void HelloWorld::testMSG(CCObject *pSender)  
26. {  
27.     CCLOG("testMSG");  
28. }  

--实际用法demo

#define EventManager NotificationCenter::getInstance()

void PlayScene::init_listen(){
EventManager->addObserver(this, CC_CALLFUNCO_SELECTOR(PlayScene::handler_refresh_hand_card), GameEvent::handler_refresh_hand_card, NULL);
EventManager->addObserver(this, CC_CALLFUNCO_SELECTOR(PlayScene::handler_refresh_all_card), GameEvent::handler_refresh_all_card, NULL);
}

EventManager->postNotification(GameEvent::on_msg, sm);

EventManager->removeAllObservers(this);

cocos2d-x 观察者设计模式