将类导出到DLL [英] exporting classes to DLLs

问题描述

hello现在有点困惑与DLL现在，所以我来到这里问，在那里有大量的编程的优点在
所以这个类叫GUI.h和GUI.cpp

hello im a bit confused with DLLs right now so i came here to ask where there are alot of pros in programming so ive got this class called GUI.h and the GUI.cpp

class GUI
{
    public:
        GUI(void);
        virtual ~GUI();
        void Draw(float x,float y,float z);
        void Texture(int num);
        bool Shutdown();
        void TextureON(int num);
        void TextureOFF(int num);

    private:
    GUIWeapon * Weapon;
    GUIWeaponA * Weapona;
    GUIArrow * Arrow;
    GUIHP * hp;
    GUIStop * stop;
    GUISpeed * Speed;
    float XCam,YCam,ZCam;
    bool DrawStop;

};

所以我不知道如何导出这个DLL我已经做了DLL，但没有类，我不能声明构造函数，析构函数并调用其他头部中的其他GUIFunctions？

so how am i suppossed to export this to a DLL i have made DLLs but not with classes so how am im suppossed to declare the Constructor,Destructor and call the other GUIFunctions in other headers?

推荐答案

或操作系统，但如果这是Windows和Microsoft C ++，那么您可以在类上使用__declspec（dllexport）将其从DLL导出。然后，当您包括要在其他地方使用的标头时，在同一个类上使用__declspec（dllimport）。

You don't specify a compiler or operating system, but if this is Windows and Microsoft C++, then you can use __declspec(dllexport) on a class to export it from a DLL. You then use __declspec(dllimport) on the same class when you include the header to be consumed elsewhere.

但是，我倾向于建议不要从DLLs导出类。这是一个好的计划，如果所有的DLL总是一起运输，并建立在一起。 [其中DLL只是用于延迟加载代码]。如果您使用DLL来提供单独运送的实际组件，您应该使用像COM这样的实际版本抽象。

However, I tend to recommend against exporting classes from DLLs. It's an ok plan if all the DLLs always ship together and are built together. [Where the DLL is just used to delay loading of code]. If you are using DLLs to provide actual components that ship separately, you should use an actual versionable abstraction like COM.

Martyn

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