Cocos2d-x结构学习（一）CCObject、CCCopying、CCZone

发布时间：2020-12-14 20:40:41 所属栏目：百科来源：网络整理

导读：1、CCZone类：保存了CCObject的指针。 class CC_DLL CCZone{public: CCZone(CCObject *pObject = NULL);public: CCObject *m_pCopyObject;}; CC_DLL的定义为（动态链接库相关）： #if defined(_USRDLL) #define CC_DLL __declspec(dllexport)#else /* use a

1、CCZone类：保存了CCObject的指针。

class CC_DLL CCZone
{
public:
    CCZone(CCObject *pObject = NULL);


public:
    CCObject *m_pCopyObject;
};

CC_DLL的定义为（动态链接库相关）：

#if defined(_USRDLL)
    #define CC_DLL     __declspec(dllexport)
#else         /* use a DLL library */
    #define CC_DLL     __declspec(dllimport)
#endif

2、CCCopying：拷贝CCZone类里的CCObject对象，仅是指针

class CC_DLL CCCopying
{
public:
    virtual CCObject* copyWithZone(CCZone* pZone);
};

3、CCObject类：继承自CCCopying类，各成员如下：

class CC_DLL CCObject : public CCCopying
{
public:
    unsigned int        m_uID;             //对象ID，<span style="font-family: Arial,Helvetica,sans-serif;">CCScriptSupport需要公共的ID。</span>
    int                 m_nLuaID;          //LUA引用ID。
protected:
    unsigned int        m_uReference;        //引用计数
    unsigned int        m_uAutoReleaseCount;  //自动释放计数
public:
    CCObject(void);
    virtual ~CCObject(void);
    
    void release(void);
    void retain(void);
    CCObject* autorelease(void);
    CCObject* copy(void);
    bool isSingleReference(void) const;
    unsigned int retainCount(void) const;
    virtual bool isEqual(const CCObject* pObject);

    virtual void acceptVisitor(CCDataVisitor &visitor);
    virtual void update(float dt) {CC_UNUSED_PARAM(dt);};
    friend class CCAutoreleasePool;
};

CCObject定义的成员函数指针：

typedef void (CCObject::*SEL_SCHEDULE)(float);
typedef void (CCObject::*SEL_CallFunc)();
typedef void (CCObject::*SEL_CallFuncN)(CCNode*);
typedef void (CCObject::*SEL_CallFuncND)(CCNode*,void*);
typedef void (CCObject::*SEL_CallFuncO)(CCObject*);
typedef void (CCObject::*SEL_MenuHandler)(CCObject*);
typedef void (CCObject::*SEL_EventHandler)(CCEvent*);
typedef int (CCObject::*SEL_Compare)(CCObject*);

CCObject相关的函数宏：

#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)
#define event_selector(_SELECTOR) (SEL_EventHandler)(&_SELECTOR)
#define compare_selector(_SELECTOR) (SEL_Compare)(&_SELECTOR)

（编辑：李大同）

【声明】本站内容均来自网络，其相关言论仅代表作者个人观点，不代表本站立场。若无意侵犯到您的权利，请及时与联系站长删除相关内容!