希望这篇文章能讲清一些问题，帮你找到答案！

目录

1.前提（简单的相关说明）

2.引入静态库           .lib

3.引入动态库           .dll

4.引入头文件           .h

5.Module链接动态库 

1.前提（简单的相关说明）

       ①  ModuleDirectory ：当前模块所在的目录

（D:\YourProject\Plugins\YourPlugin\Source\YourMoudle）

ModuleDirectory

        ② Path.Combine：路径拼接

(Path.Combine(”c“,"project") 返回 c/project)

Path.Combine(ModuleDirectory, "../ThirdParty/include")

         ③ 三方库文件类型，方便跨平台时统一标记

        string libPrefix;
        string libPostfix;
        string DLLPostfix;
        string platform;
        if (Target.Platform == UnrealTargetPlatform.Win64)
        {
            platform = "Windows-x64";
            libPostfix = ".lib";
            libPrefix = "";
            DLLPostfix = ".dll";
        }
        else if (Target.Platform == UnrealTargetPlatform.Mac)
        {
            platform = "Darwin-x64";
            libPostfix = ".a";
            libPrefix = "lib";
            //DLLPostfix = ".dll"; 这个我不知道，目前只做过windows
        }
        else if (Target.Platform == UnrealTargetPlatform.Android)
        {
            platform = "Android-xaarch64";
            libPostfix = ".a";
            libPrefix = "lib";
            //DLLPostfix = ".dll"; 这个我不知道，目前只做过windows
        }
        else if (Target.Platform == UnrealTargetPlatform.Linux)
        {
            platform = "Linux-x64";
            libPostfix = ".a";
            libPrefix = "lib";
            //DLLPostfix = ".dll"; 这个我不知道，目前只做过windows
        }
        else if(Target.Platform == UnrealTargetPlatform.IOS)
        {
            platform = "iOS-xarm64";
            libPostfix = ".a";
            libPrefix = "lib";
            //DLLPostfix = ".dll"; 这个我不知道，目前只做过windows
        }
        else {
            platform = "Unknown";
            libPostfix = ".Unknown";
            libPrefix = "Unknown";
            DLLPostfix = ".Unknown";
        }

          ④ PublicDefinitions.Add("A=B") : 定义一个属于自己的宏，类似于引擎的WITH_EDITOR

PublicDefinitions.Add("YOUR_DLL_NAME=yourDLLName.dll");

2.引入静态库           .lib

        引入Lib和DLL应该合并起来，此处为了表述清楚故而分开！！！

    string LibPath = Path.Combine(ModuleDirectory, "../ThirdParty/lib/" + platform);
    if (Target.Platform == UnrealTargetPlatform.Win64)
    {
        string LibName = "YourLib";
        PublicAdditionalLibraries.Add(Path.Combine(LibPath, LibName + libPostfix));
    }
    else//other platform
    {
    }

3.引入动态库           .dll

        引入Lib和DLL应该合并起来，此处为了表述清楚故而分开！！！

        此处还自定义了三个相关的宏，用于Moudle链接DLL的统一方式

    string DLLPath = Path.Combine(ModuleDirectory, "../ThirdParty/dll/" + platform);
    if (Target.Platform == UnrealTargetPlatform.Win64)
    {
        string DLL1Name = "yourDLL1" + DLLPostfix;
        string DLL2Name = "yourDLL2" + DLLPostfix;
        PublicDelayLoadDLLs.Add(DLL1Name );
        PublicDelayLoadDLLs.Add(DLL2Name );
        RuntimeDependencies.Add(Path.Combine("$(TargetOutputDir)", DLL1Name ),                 Path.Combine(DLLPath, DLL1Name ));
        RuntimeDependencies.Add(Path.Combine("$(TargetOutputDir)", DLL2Name ), Path.Combine(DLLPath, DLL2Name ));

        //自定义宏
        //我的DLL放在了ThirdParty/dll文件夹下
        PublicDefinitions.Add("YOUR_DLL_PATH=Source/ThirdParty/dll/" + platform);
        PublicDefinitions.Add("YOUR_DLL1_NAME=" + DLL1Name);
        PublicDefinitions.Add("YOUR_DLL2_NAME=" + DLL2Name);
    }
    else//other platform
    {
    }

4.引入头文件           .h

        一般会把引入的头文件放在模块同级目录的【ThirdParty/include】文件夹中，所以可以这么写，当然build.cs会自动生成一些文件，对比一下，手动添加即可；

PublicIncludePaths.AddRange(
      new string[] {
				// ... add public include paths required here ...
                Path.Combine(ModuleDirectory, "../ThirdParty/include")
            }
      );


    PrivateIncludePaths.AddRange(
      new string[] {
				// ... add other private include paths required here ...
			}
      );

5.Module链接动态库

        Module文件中链接DLL

void FInVideoModule::StartupModule()
{
    //#include "Interfaces/IPluginManager.h"
	const FString PluginDir = IPluginManager::Get().FindPlugin(TEXT("YourPluginName"))->GetBaseDir();
	const FString DLLPath = PluginDir / TEXT(PREPROCESSOR_TO_STRING(YOUR_DLL_PATH));
	const FString DLL1Path = DLLPath / TEXT(PREPROCESSOR_TO_STRING(YOUR_DLL1_NAME));
	const FString DLL2Path = DLLPath / TEXT(PREPROCESSOR_TO_STRING(YOUR_DLL2_NAME));
    
    //定义在moudle.h中的变量
    //	void* Dll1Handle = nullptr;
	//  void* Dll2Handle = nullptr;
	Dll1Handle = FPlatformProcess::GetDllHandle(*DLLPath);
	Dll2Handle = FPlatformProcess::GetDllHandle(*DLLFFMPEGPath);
}