【UE4 C++】調用外部鏈接庫：lib靜態庫

簡述

• 本例以插件形式測試
• 使用Lib引用，打包程序運行不用再拷貝lib文件
• 需要 lib 文件和 .h 頭文件

lib部分的代碼

• .h 頭文件

  #pragma once
  #ifndef __MYTEST_LIB_H__
  #define __MYTEST_LIB_H__
  #include <string>
  #include <iostream>
  
  int myPrint( int _age);
  
  #endif
  

• .cpp 文件

  #include "MyTestLib.h"
  
  int myPrint(int _age)
  {
  	return _age + 1000;
  }
  

UE4 插件代碼

Plugin lib文件部署

插件 build.cs設置

using System.IO;
namespace UnrealBuildTool.Rules
{
    public class JsonPlugin : ModuleRules
    {
        private string ModulePath
        {
            // get { return Path.GetDirectoryName(RulesCompiler.GetModuleFilename(this.GetType().Name)); }
            get { return ModuleDirectory; }
        }

        private string ThirdPartyPath
        {
            get { return Path.GetFullPath(Path.Combine(ModulePath, "../../ThirdParty/")); }
        }
        private string MyLibPath //第三方庫MyTestLib的目錄
        {
            get { return Path.GetFullPath(Path.Combine(ThirdPartyPath, "mylib")); }
        }

        public JsonPlugin(TargetInfo Target)
        {
            PublicIncludePaths.AddRange(
                new string[] {
                    "JsonPlugin/Public",
                    // ... add public include paths required here ...
                }
                );

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

            PublicDependencyModuleNames.AddRange(
                new string[]
                {
                    "Core",
                    "CoreUObject",
                    "Engine",
                    "HTTP",
                    "Json"
                    // ... add other public dependencies that you statically link with here ...
                }
                );

            PrivateDependencyModuleNames.AddRange(
                new string[]
                {
                    // ... add private dependencies that you statically link with here ...
                }
                );

            DynamicallyLoadedModuleNames.AddRange(
                new string[]
                {
                    // ... add any modules that your module loads dynamically here ...
                }
                );

            LoadThirdPartyLib(Target);
        }

        public bool LoadThirdPartyLib(TargetInfo Target)
        {
            bool isLibrarySupported = false;
            if ((Target.Platform == UnrealTargetPlatform.Win64) || (Target.Platform == UnrealTargetPlatform.Win32))//平台判斷
            {
                isLibrarySupported = true;
                System.Console.WriteLine("----- isLibrarySupported true");
                //string PlatformSubPath = (Target.Platform == UnrealTargetPlatform.Win64) ? "Win64" : "Win32";
                string LibrariesPath = Path.Combine(MyLibPath, "Lib");
                PublicAdditionalLibraries.Add(Path.Combine(LibrariesPath,/* PlatformSubPath,*/ "MyTestLib.lib"));//加載第三方靜態庫.lib
            }

            if (isLibrarySupported) //成功加載庫的情況下，包含第三方庫的頭文件
            {
                // Include path
                System.Console.WriteLine("----- PublicIncludePaths.Add true");
                PublicIncludePaths.Add(Path.Combine(MyLibPath, "Include"));
            }
            return isLibrarySupported;
        }
    }
}

調用

• JsonFunction.cpp代碼

#include "../ThirdParty/mylib/Include/MyTestLib.h"

int UJsonFunction::MyOutput()
{
    int str = myPrint(100); //lib 里的函數
    return str;
}

原文最早發布於：https://blog.csdn.net/Szu_IT_Man/article/details/58232638