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打开UE工程，点击编辑，选择插件，点击"打包"按钮，选择输出目录
UE4.26版本打包提示需要VS2017问题解决
1）用记事本打开文件【UE4对应版本安装目录\Epic Games\UE_4.26\Engine\Build\BatchFiles\RunUAT.bat】

2）搜索【%UATExecutable% %* %UATCompileArg%】并删除本行

3）在本行添加【%UATExecutable% %* -VS2019=true %UATCompileArg%】

4）保存并关闭文件

5）重启UE4并打包插件

编译比较严格，需要看报错提示补充类的前置申明以及头文件引用

//head文件

#include "CoreMinimal.h"

#include "Subsystems/GameInstanceSubsystem.h"

#include "Runtime/Online/HTTP/Public/Http.h"

#include "Engine/EngineTypes.h"

#include "VRVIUOnlineGameSubsystem.generated.h"

class FJsonObject;

//cpp文件

#include "VRVIUOnlineGameSubsystem.h"

#include "Kismet/GameplayStatics.h"

#include "SocketSubsystem.h"

#include "Engine/World.h"

#include "TimerManager.h"

#include "Serialization/JsonReader.h"

#include "Serialization/JsonWriter.h"

#include "Serialization/JsonSerializer.h"

把打包好的插件，拷贝到工程plugins目录下，删除private源码文件夹，修改".Build.cs"文件，添加编译条件bUsePrecompiled

public class MultiPlayerPlugin : ModuleRules

{

public MultiPlayerPlugin(ReadOnlyTargetRules Target) : base(Target)

{

bEnableUndefinedIdentifierWarnings = false;

PCHUsage = ModuleRules.PCHUsageMode.UseExplicitOrSharedPCHs;

bUsePrecompiled = true;

PublicIncludePaths.AddRange(

new string[] {

"MultiPlayerPlugin/Public"

}

);

PrivateIncludePaths.AddRange(

new string[] {

}

);

PublicDependencyModuleNames.AddRange(

new string[]

{

"Core"

// ... add other public dependencies that you statically link with here ...

}

);

PrivateDependencyModuleNames.AddRange(

new string[]

{

"CoreUObject",

"Engine",

"Slate",

"SlateCore", "UMG", "Http", "Json", "JsonUtilities", "Sockets", "Networking"

// ... add private dependencies that you statically link with here ...

}

);

DynamicallyLoadedModuleNames.AddRange(

new string[]

{

// ... add any modules that your module loads dynamically here ...

}

);

}