UE4接入SteamSDK及相关资料

游戏上架Steam必须要接入SteamSDK，本篇文章简单介绍一下在UE4中接入SteamSDK的方法，后续与接入Steam平台服务相关的内容也会放到这篇文章中。

SteamSDK的接入可以使游戏与Steam的社区整合，Steam拥有很好的社区生态，这一点是Epic刚出的Epic Games Store目前比不了的~(当然我是支持市场竞争的。

废话不多说，首先，检查引擎目录下:

1	Engine\Binaries\ThirdParty\Steamworks\Steamv139

该目录下是否有Win32/Win64文件夹，以及其中是否具有以下几个文件：

1	steam_api.dll steamclient.dll tier0_s.dll vstdlib_s.dll

如果没有可以从Steam的安装目录拷贝过来。

之后打开项目，打开Plugins - Online Platfrom，确保启用以下三个插件：

Online Subsystem NULL
Online Subsystem Steam
Online Subsystem Utils

打开项目的*.target.cs文件，加入bUsesSteam = true;:

using UnrealBuildTool;
using System.Collections.Generic;

public class SanguoWarriorsTarget : TargetRules
{
  public SanguoWarriorsTarget(TargetInfo Target) : base(Target)
  {
    Type = TargetType.Game;
    bUsesSteam = true;
    ExtraModuleNames.AddRange( new string[] { "SanguoWarriors" } );
  }
}

打开项目的*.build.cs，额外添加OnlineSubsystem的模块依赖：

PublicDependencyModuleNames.AddRange(
        new string[] {
            "OnlineSubsystem",
            "OnlineSubsystemUtils",
        });

PrivateDependencyModuleNames.AddRange(
            new string[] {
                "OnlineSubsystem",
                "OnlineSubsystemUtils"
        });

打开项目目录下的Config/DefaultEngine.ini，加入(或编辑)以下内容：

[/Script/Engine.Engine]
!NetDriverDefinitions=ClearArray
+NetDriverDefinitions=(DefName="GameNetDriver",DriverClassName="/Script/OnlineSubsystemSteam.SteamNetDriver",DriverClassNameFallback="/Script/OnlineSubsystemUtils.IpNetDriver")

[OnlineSubsystem]
DefaultPlatformService=Steam
PollingIntervalInMs=20

[OnlineSubsystemSteam]
bEnabled=true
SteamDevAppId=480
GameServerQueryPort=27015
bRelaunchInSteam=false

注意修改SteamDevAppId项为你自己的Steam内容的AppID.
上面的操作完毕之后，打开Steam(必须启动Steam才可以在游戏中使用Shift+Tab)唤出Steam的界面。

然后可以使用Standalone模式运行游戏，进入游戏后按下Shift+Tab如果可以唤出Steam，即为成功。

如果日志中出现这样的警告：

[2019.03.18-06.02.22:971][186]LogOnline: Warning: STEAM: Steamworks: SteamUtils() failed!
[2019.03.18-06.02.22:971][186]LogOnline: Warning: STEAM: Steamworks: SteamUser() failed!
[2019.03.18-06.02.22:972][186]LogOnline: Warning: STEAM: Steamworks: SteamFriends() failed!
[2019.03.18-06.02.22:972][186]LogOnline: Warning: STEAM: Steamworks: SteamRemoteStorage() failed!
[2019.03.18-06.02.22:973][186]LogOnline: Warning: STEAM: Steamworks: SteamUserStats() failed!
[2019.03.18-06.02.22:973][186]LogOnline: Warning: STEAM: Steamworks: SteamMatchmakingServers() failed!
[2019.03.18-06.02.22:973][186]LogOnline: Warning: STEAM: Steamworks: SteamApps() failed!
[2019.03.18-06.02.22:973][186]LogOnline: Warning: STEAM: Steamworks: SteamNetworking() failed!
[2019.03.18-06.02.22:974][186]LogOnline: Warning: STEAM: Steamworks: SteamMatchmaking() failed!
[2019.03.18-06.02.22:974][186]LogOnline: Display: STEAM: OnlineSubsystemSteam::Shutdown()
[2019.03.18-06.02.22:975][186]LogOnline: Warning: STEAM: Steam API failed to initialize!
[2019.03.18-06.02.22:975][186]LogOnline: Display: STEAM: OnlineSubsystemSteam::Shutdown()