ue4插件开发

编写ue4插件

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1、直接从Editor中生成一个空的插件模板 

然后最右下角 

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2、关掉vs，右键生成一下工程文件，把Plugins扫进去

打开解决方案开始编写插件 
瞧，插件加进来了 

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3、编写插件

1- 首先把插件的配置文TestPlugin.uplugin件改一下(被这个坑了两天)

这个LoadingPhase的值默认为Default，必须修改为PreDefault，不然重启Editor会报关联不上插件源码的错误，切记！ 

2- 修改编译模块配置TestPlugin.Build.cs文件，c#文件

详细代码，里面有注释

using UnrealBuildTool;
using System.IO; //路径获取需要用到IO

public class TestPlugin : ModuleRules
{
    private string ModulePath //当前TestPlugin.Build.cs文件所在的路径
    {
        get { return Path.GetDirectoryName(RulesCompiler.GetModuleFilename(this.GetType().Name)); }
    }

    private string ThirdPartyPath //这个插件引用的第三方库的目录
    {
        get { return Path.GetFullPath(Path.Combine(ModulePath, "../../ThirdParty/")); }
    }

    private string MyTestLibPath //第三方库MyTestLib的目录
    {
        get { return Path.GetFullPath(Path.Combine(ThirdPartyPath, "MyTestLib")); }
    }

    public TestPlugin(TargetInfo Target)
    {
        PublicIncludePaths.AddRange( //公有文件搜索路径
            new string[] {
                "TestPlugin/Public"
                // ... add public include paths required here ...
            }
            );

        PrivateIncludePaths.AddRange(
            new string[] {
                "TestPlugin/Private" //私有文件搜索路径
                // ... add other private include paths required here ...
            }
            );

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

        PrivateDependencyModuleNames.AddRange(
            new string[]
            {
                "CoreUObject",
                "Engine",
                "Slate",
                "SlateCore",
                // ... add private dependencies that you statically link with here ...  
            }
            );

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

        LoadThirdPartyLib(Target); //加载第三方库
    }

    public bool LoadThirdPartyLib(TargetInfo Target)
    {
        bool isLibrarySupported = false;
        if ((Target.Platform == UnrealTargetPlatform.Win64) || (Target.Platform == UnrealTargetPlatform.Win32))//平台判断
        {
            isLibrarySupported = true;
            System.Console.WriteLine("----- isLibrarySupported true");
            string PlatformSubPath = (Target.Platform == UnrealTargetPlatform.Win64) ? "Win64" : "Win32";
            string LibrariesPath = Path.Combine(MyTestLibPath, "Lib");
            PublicAdditionalLibraries.Add(Path.Combine(LibrariesPath, PlatformSubPath, "TestLib.lib"));//加载第三方静态库.lib
        }

        if (isLibrarySupported) //成功加载库的情况下，包含第三方库的头文件
        {
            // Include path
            System.Console.WriteLine("----- PublicIncludePaths.Add true"); 
            PublicIncludePaths.Add(Path.Combine(MyTestLibPath, "Include"));
        }
        return isLibrarySupported;
    }
}
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3- 写个自定义的char – TestChar，继承自Character

先看下文件结构，需要蓝图可见的必须丢到Public下 

1、先修改预编译头文件TestPluginPrivatePCH.h，必须包含CoreUObject，不然编译不过，切记！

#include "TestPlugin.h"

// UObject core
#include "CoreUObject.h" //默认是不含这个的

// Actor based classes
#include "GameFramework/Character.h" //包插件中所有用的的引擎类都丢到这里来
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2、头文件，正常编写自定义的类一样

#pragma once

#include "GameFramework/Character.h"
#include "TestChar.generated.h"

UCLASS()
class ATestChar : public ACharacter
{
    GENERATED_BODY()

public:
    // Sets default values for this character\'s properties
    ATestChar();

    UPROPERTY(EditAnywhere, Category = "Test Char")
        int32           mAge;
    UPROPERTY(EditAnywhere, Category = "Test Char")
        FString         mName;
};
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3、 cpp文件，包含的是预编译文件和类的头文件

#include "TestPluginPrivatePCH.h"
#include "TestChar.h"
#include "TestLib.h" //引入的第三方库的头文件

ATestChar::ATestChar() : Super()
{
    mAge = myPrint("hello world", 123); //第三方库中的方法
    mName = "yangx";
}
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//第三方库打成了一个静态库TestLib.lib 
TestLib.h

#ifndef __TEST_LIB_H__
#define __TEST_LIB_H__
#include <string>
#include <iostream>

int myPrint(std::string _name, int _age);

#endif
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TestLib.cpp

#include "TestLib.h"

int myPrint(std::string _name, int _age)
{
    return _age + 1000;
}
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4、编译运行，在Editor中create一个Blueprint继承自这个TestChar类

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5、拖到场景运行游戏