c++ - 类 TESTDLL_LIBSHARED_EXPORT TestDLL_lib

Question

我从 QLibrary 开始，在这种情况下，我遇到了 Stack Overflow 问题 "QLibrary - import a class" 。我对这个问题有一个疑问:

类声明中的TESTDLL_LIBSHARED_EXPORT的含义是什么？

class TESTDLL_LIBSHARED_EXPORT TestDLL_lib
{

public:
    TestDLL_lib();

    int a;
    int b;
    int c;

    int getValues();
}; 

Answer 1

请引用How to use a class in DLL?以获得详细答案。

you can export data, functions, classes, or class member functions from a DLL using the __declspec(dllexport) keyword. __declspec(dllexport) adds the export directive to the object file so you do not need to use a .def file. To export all of the public data members and member functions in a class, the keyword must appear to the left of the class name as follows:

class TESTDLL_LIBSHARED_EXPORT TestDLL_lib