关于函数指针调用C++非静态成员
????????當在類里面定義函數指針,而函數指針會指向類里面的成員的時候,這個時候成員需要定義為靜態成員。實例代碼如下:
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????????????????????????????????? ?//.h #define SCMD_REGISTER 0 class CCallFuctionList { public:CCallFuctionList();virtual ~CCallFuctionList(void);typedef void (* FUNCPTR)();typedef std::multimap<unsigned int, FUNCPTR> FUNCMAP;typedef std::multimap<unsigned int, FUNCPTR>::iterator FUNCMAP_ITERATOR;static void CallDoRegister(); private:static int i;static FUNCMAP_ITERATOR m_funcIter;FUNCMAP m_FuncMap; };//.cpp int CCallFuctionList::i = 0; CCallFuctionList::FUNCMAP_ITERATOR CCallFuctionList::m_funcIter = NULL; CCallFuctionList::CCallFuctionList() {#define REGISTE_FUNC(type, func) m_FuncMap.insert(std::make_pair(type, func))REGISTE_FUNC(SCMD_REGISTER, CallDoRegister);REGISTE_FUNC(SCMD_REGISTER, CallDoRegister); }void CCallFuctionList::CallDoRegister() {i = -1;(m_funcIter->second)(); }
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????????? 靜態函數里面調用的所有類成員都需要設置為靜態!你肯定想不就全改成靜態的就完了,但靜態變量都需要初始化,且靜態函數里面調用了靜態的Vetor初始化起來比較麻煩,還有種方式,通過一種方式使函數指針調用c++非靜態函數。
????????? 代碼如下:
?????????????????????????????????? class CCallFuctionList { public:CCallFuctionList();virtual ~CCallFuctionList(void);typedef void (CCallFuctionList::*FUNCPTR)();typedef std::multimap<unsigned int, FUNCPTR> FUNCMAP;typedef std::multimap<unsigned int, FUNCPTR>::iterator FUNCMAP_ITERATOR;void CallDoRegister(); private:FUNCMAP_ITERATOR m_funcIter;FUNCMAP m_FuncMap;int i; };CCallFuctionList::CCallFuctionList() { #define REGISTE_FUNC(type, func) m_FuncMap.insert(std::make_pair(type, func))REGISTE_FUNC(SCMD_REGISTER, &CCallFuctionList::CallDoRegister);REGISTE_FUNC(SCMD_REGISTER, &CCallFuctionList::CallDoRegister); }void CCallFuctionList::CallDoRegister() {i = -1;(this->*m_funcIter->second)(); }
???????? 傳this指針進去,是因為函數指針調用時,默認并沒將this傳進去,需要自己手動傳!
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