//函数调用 bind&function 
void fun(){    CCLOG("Hello cocos");    return;}std::function<void()> f = std::bind(fun);fun();

void fun1(){    int number = 8;   // auto fc = [&](int i){   auto fc = [=](int i)mutable{        number++;        return i+number;                   };        cout<<fc(6);}

//获得MenuItemFont得文件名

void SceneB:: onSelectFile(Ref *obj){    MenuItemFont *it1 = (MenuItemFont *) obj;    Label *lable = (Label*)it1->getLabel();     CCLOG("%s",lable->getString().c_str() );        }

std::function<void(std::string)> f;//->函数对象