UE4/5 | 纯蓝图工程项目转为C++工程项目

一个纯蓝图工程打开的话会报错：

This project does not have any source code. You need to add C++ source files to the project from the Editor before you can generate project files.

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要转化为C++工程只需要在根目录添加Source文件夹（空文件夹即可），然后就可以右键Generate Virtual Studio project files生成.vs文件。

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之后在Source文件夹中新建三个文件
项目名##.Target.cs文件

// Fill out your copyright notice in the Description page of Project Settings.

using UnrealBuildTool;
using System.Collections.Generic;

public class 项目名Target : TargetRules
{
	public 项目名Target(TargetInfo Target) : base(Target)
	{
		Type = TargetType.Game;
		DefaultBuildSettings = BuildSettingsVersion.V2;

		ExtraModuleNames.AddRange( new string[] { "项目名" } );
	}
}

项目名##Editor.Target.cs的文件

// Fill out your copyright notice in the Description page of Project Settings.

using UnrealBuildTool;
using System.Collections.Generic;

public class 项目名EditorTarget : TargetRules
{
	public 项目名EditorTarget(TargetInfo Target) : base(Target)
	{
		Type = TargetType.Editor;
		DefaultBuildSettings = BuildSettingsVersion.V2;

		ExtraModuleNames.AddRange( new string[] { "项目名" } );
	}
}

一个项目名文件夹，文件夹中新建项目名##Build.cs文件：

// Fill out your copyright notice in the Description page of Project Settings.
// 项目名##Build.cs
using UnrealBuildTool;

public class 项目名 : ModuleRules
{
	public 项目名(ReadOnlyTargetRules Target) : base(Target)
	{
		PCHUsage = PCHUsageMode.UseExplicitOrSharedPCHs;

		bEnableUndefinedIdentifierWarnings = false;
		PublicDependencyModuleNames.AddRange(new string[] { "Core", "CoreUObject", "Engine", "InputCore"});

		PrivateDependencyModuleNames.AddRange(new string[] {});

		// Uncomment if you are using Slate UI
		// PrivateDependencyModuleNames.AddRange(new string[] { "Slate", "SlateCore" });
		
		// Uncomment if you are using online features
		// PrivateDependencyModuleNames.Add("OnlineSubsystem");

		// To include OnlineSubsystemSteam, add it to the plugins section in your uproject file with the Enabled attribute set to true
	}
}