1，进入这三个源码中，可以看到这几句代码分别为

typedef void (CCobject::*SEL_SCHEDULE)(float); //函数指针，函数有一个参数float,返回类型为void

typedef void (CCobject::*SEL_CallFunc)();//函数指针，函数无参数,返回类型为void

typedef void (CCobject::*SEL_CallFuncN)(CCNode*)//函数指针，函数有一个参数,返回类型为void

typedef void (CCobject::*SEL_CallFuncND)(CCNode*,void*);/函数指针，函数有一个参数,返回类型为void

typedef void (CCobject::*SEL_CallFuncND)(CCNode*,void*);/函数指针，函数有两个参数,返回类型为void

typedef void (CCobject::*SEL_CallFuncO)(CCObject*);/函数指针，函数有一个参数,返回类型为void

typedef void (CCObject::SEL_MenuHandler)(CCObject*);// 函数指针，函数有一个参数，返回类型为void

2,这些都是Cocos2dx中定义的宏

#define schedule_selector(_SELECTOR) (SEL_SCHEDULE)(&_SELECTOR)

#define callfunc_selector(_SELECTOR) (SEL_CallFunc)(&_SELECTOR)

#define callfuncN_selector(_SELECTOR) (SEL_CallFuncN)(&_SELECTOR)

#define callfuncND_selector(_SELECTOR) (SEL_CallFuncND)(&_SELECTOR)

#define callfuncO_selector(_SELECTOR) (SEL_CallFuncO)(&_SELECTOR)

#define menu_selector(_SELECTOR) (SEL_MenuHandler)(&_SELECTOR)

void Daojishi(float dt);//必须要有参数才能调用update

我们可能都会用到，如 this->schedule(schedule_selector(myTest::Daojishi));

void add(CCobject * pSender);

或者item->setTarget(menu_selector(myTest::add));

CCNode * node

SEL_CallFuncND selectorND;// 函数指针

或者 CCObject *pSelectorTarget; SEL_SCHEDULE selector;

4，如果我们自己定义个回调函数，可以这样来写

menu_selector(HelloWorld::menuCloseCallback));

Object::*SEL_Cal