[游戏开发]UE5动态加载dll错误

一般都是因为你的dll还有其他依赖dll没找到引起的

注意看?GetLastError=126就是找不到依赖dll

下面是正常动态加载dll的代码

//获取ChessDll插件路径
FString BaseDir = IPluginManager::Get().FindPlugin("ChessDll")->GetBaseDir();

//拼接路径
FString LibraryPath;
LibraryPath = FPaths::Combine(*BaseDir,TEXT("Binaries/ThirdParty/ChessLibrary/Win64/untitled.dll"));

//把这个路径加入搜索，主要可以搜到依赖dll
FPlatformProcess::PushDllDirectory(*(FPaths::ProjectDir() / TEXT("Plugins/ChessDll/Binaries/ThirdParty/ChessLibrary/Win64/")));

//加载dll
ChessLibraryHandle = !LibraryPath.IsEmpty() ? FPlatformProcess::GetDllHandle(*LibraryPath) : nullptr;

if (ChessLibraryHandle)
{
}
else
{
//弹窗报错
FMessageDialog::Open(EAppMsgType::Ok, LOCTEXT("ThirdPartyLibraryError", "Failed to load example ChessDll library"));
}

#include "Modules/ModuleManager.h"

另外如果是c++的dll注意函数命名，也许你的add叫做_Z3addii

调用的话就如下图

?感觉最难的还是函数指针，有头文件最好加上头文件，能省很大功夫