Visual Studio 中的 wxwidgets 应用程序给出错误“LNK2019 未解析的外部符号"；

问题描述

我正在用 C++ 和 wxwidgets 创建我的第一个程序.当我尝试编译项目时，出现错误.

Im creating my first program with C++ and wxwidgets. When I try to compile the project I get errors.

LNK2019 unresolved external symbol _main referenced in function "int __cdecl invoke_main(void)" (?invoke_main@@YAHXZ)

LNK1120 1 unresolved externals

我已经在 Visual Studio 中自己编译了 wxwidgets.

I have compiled the wxwidgets my self in Visual Studio.

编译后我在 Visual Studio 中创建了一个新的 C++ 空项目.

After compiling I created a new C++ empty project in Visual Studio.

我去配置并添加了包含目录:

I went to configuration and added includes directories:

配置属性 -> C/C++ -> 常规 -> 附加包含目录:

C:\Users\user\source\repos\wxWidgets\include;C:\Users\user\source\repos\wxWidgets\include\msvc

C:\Users\user\source\repos\wxWidgets\include; C:\Users\user\source\repos\wxWidgets\include\msvc

配置属性 -> 链接器 -> 附加库目录:

C:\Users\user\source\repos\wxWidgets\lib\vc_lib

C:\Users\user\source\repos\wxWidgets\lib\vc_lib

然后我添加了 2 个类，cApp 和 cMain.

Then I added 2 classes, cApp and cMain.

cApp.h

#pragma once

#include "wx/wx.h"
#include "cMain.h"

class cApp : public wxApp
{
public:
    cApp();
    ~cApp();

private: 
    cMain* m_frame1 = nullptr;

public: 
    virtual bool OnInit();
};

cApp.cpp

#include "cApp.h"

wxIMPLEMENT_APP(cApp);

cApp::cApp() {

}

cApp::~cApp() {

}

bool cApp::OnInit() {
    m_frame1 = new cMain();
    m_frame1->Show();

    return true;
}

cMain.h

#pragma once

#include "wx/wx.h"

class cMain : public wxFrame
{
public:
    cMain();
    ~cMain();
};

cMain.cpp

#include "cMain.h"

cMain::cMain() : wxFrame(nullptr, wxID_ANY, "MyProgram") {

}

cMain::~cMain() {

}

推荐答案

您有(由于下面的评论而编辑后)以下问题:

You have (after the edit due to the comment below) the following problem:

1. 您将应用程序构建为控制台模式应用程序，而不是 GUI 应用程序.虽然也可以从控制台应用程序使用 wxWidgets，但这可能不是您想要做的，因此请确保将项目属性对话框中的链接器|系统|子系统"选项设置为Windows".

1. You're building your application as a console mode application and not a GUI one. While it is possible to use wxWidgets from console applications too, this is probably not what you're trying to do, so ensure that the "Linker|System|SubSystem" option in the properties dialog of your project is set to "Windows".

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