实现监听服务器

前面我们通过蓝图节点实现了局域网连接的功能实际上我们还可以给项目打包后生成的

.exe

文件创建一个快捷方式然后修改这个快捷方式的属性中的目标就可以实现简易的联网功能。

RPC

127.0.0.1该端会先断开服务器然后再链接一次NM_ListenServer打包出来的

exe

-game运行该快捷方式如果存在监听端就会链接上监听服务器成为客户端执行

GetNetMode()

EchoNetMode();RPCController.cpp

引入头文件

1280x720w);ConsoleCommand(ScreenCommand);bShowMouseCursor

InputMode;SetInputMode(InputMode);//

}void

NM_DedicatedServer:DDH::Debug()

NM_DedicatedServer

RPCCourseServer.exe可以看到左上角已经变成了聆听服务器。

再创建一个快捷方式命名为

RPCCourseClient.exe可以看到后者的窗口里左上角显示是客户端。

此时在服务端按下

127.0.0.1。

可以看到独立端加入了服务端并且原独立端左上角输出了当前为客户端。

此时在服务端按下

UCreateSessionCallbackProxyUStartSessionCallbackProxyUFindSessionsCallbackProxyUJoinSessionCallbackProxyUDestroySessionCallbackProxy

URPCInstance

在整个游戏所有关卡中都存在用来传递关卡数据在保存数据方面起作用联网数据放在

GameInstance

的引用并且声明两个蓝图可调用的方法用于接入主界面的按钮点击事件。

MenuWidget.h

AssignRPCInstance(URPCInstance*

InInstance);UFUNCTION(BlueprintCallable)void

LANServerEvent();UFUNCTION(BlueprintCallable)void

LANClientEvent();public:URPCInstance*

RPCInstance;

UMenuWidget::AssignRPCInstance(URPCInstance*

InInstance)

Interfaces/OnlineSessionInterface.h

如果这个不行就用下面这句

../Plugins/Online/OnlineSubsystem/Source/Public/Interfaces/OnlineSessionInterface.h

#include

Delegates/IDelegateInstance.h#include

提前声明

{GENERATED_BODY()public:URPCInstance();//

注册玩家控制器并且获取联网系统和端

AssignPlayerController(APlayerController*

InController);//

OnStartOnlineGameComplete(FName

SessionName,

EOnJoinSessionCompleteResult::Type

Result);//

bWAsSuccessful);protected:APlayerController*

PlayerController;//

开启服务器委托与句柄FOnCreateSessionCompleteDelegate

OnCreateSessionCompleteDelegate;FOnStartSessionCompleteDelegate

OnStartSessionCompleteDelegate;FDelegateHandle

OnCreateSessionCompleteDelegateHandle;FDelegateHandle

OnStartSessionCompleteDelegateHandle;//

加入服务器委托与句柄FOnFindSessionsCompleteDelegate

OnFindSessionsCompleteDelegate;FOnJoinSessionCompleteDelegate

OnJoinSessionCompleteDelegate;FDelegateHandle

OnFindSessionsCompleteDelegateHandle;FDelegateHandle

OnJoinSessionCompleteDelegateHandle;//

销毁会话委托与句柄FOnDestroySessionCompleteDelegate

OnDestroySessionCompleteDelegate;FDelegateHandle

OnDestroySessionCompleteDelegateHandle;//

OnlineSub;//

SessionsTSharedPtrFOnlineSessionSearch

SearchObject;

../Plugins/Online/OnlineSubsystem/Source/Public/OnlineSubsystem.h

#include

../Plugins/Online/OnlineSubsystem/Source/Public/OnlineSessionSettings.h

#include

../Plugins/Online/OnlineSubsystem/Source/Public/Interfaces/OnlineSessionInterface.h

#include

../Plugins/Online/OnlineSubsystemUtils/Source/OnlineSubsystemUtils/Public/OnlineSubsystemUtils.h

#include

GameFramework/PlayerController.h

#include

Kismet/GameplayStatics.hURPCInstance::URPCInstance()

{//

绑定回调函数OnCreateSessionCompleteDelegate

FOnCreateSessionCompleteDelegate::CreateUObject(this,

URPCInstance::OnCreateSessionComplete);OnStartSessionCompleteDelegate

FOnStartSessionCompleteDelegate::CreateUObject(this,

URPCInstance::OnStartOnlineGameComplete);OnFindSessionsCompleteDelegate

FOnFindSessionsCompleteDelegate::CreateUObject(this,

URPCInstance::OnFindSessionsComplete);OnJoinSessionCompleteDelegate

FOnJoinSessionCompleteDelegate::CreateUObject(this,

URPCInstance::OnJoinSessionComplete);OnDestroySessionCompleteDelegate

FOnDestroySessionCompleteDelegate::CreateUObject(this,

URPCInstance::OnDestroySessionComplete);

}void

URPCInstance::AssignPlayerController(APlayerController*

InController)

获取方式一Online::GetSubsystem(GetWorld(),

NAME_None)推荐方式//

Online::GetSubsystem(PlayerController-GetWorld(),

NAME_None);//

获取方式一UGameplayStatics::GetGameInstance(GetWorld())-GetLocalPlayers()[0]-GetPreferredUniqueNetId()if

{DDH::Debug()

(*GetLocalPlayers()[0]-GetPreferredUniqueNetId()).AsShared();}#if

0//

(PlayerController-PlayerState)UserID

PlayerController-PlayerState-UniqueId.GetUniqueNetId();elseDDH::Debug()

PlayerState

OnlineSub-GetSessionInterface();if

(Session.IsValid())

连接数Settings.NumPublicConnections

true;Settings.bAllowJoinInProgress

true;//

true;Settings.bAllowJoinViaPresence

true;//

绑定委托OnCreateSessionCompleteDelegateHandle

Session-AddOnCreateSessionCompleteDelegate_Handle(OnCreateSessionCompleteDelegate);//

创建会话Session-CreateSession(*UserID,

NAME_GameSession,

OnlineSub-GetSessionInterface();if

(Session.IsValid())

返回结果数SearchObject-MaxSearchResults

10;//

true;SearchObject-QuerySettings.Set(SEARCH_PRESENCE,

true,

EOnlineComparisonOp::Equals);//

绑定寻找会话委托OnFindSessionsCompleteDelegateHandle

Session-AddOnFindSessionsCompleteDelegate_Handle(OnFindSessionsCompleteDelegate);//

进行会话寻找Session-FindSessions(*UserID,

}void

OnlineSub-GetSessionInterface();if

(Session.IsValid())

绑定销毁会话委托OnDestroySessionCompleteDelegateHandle

Session-AddOnDestroySessionCompleteDelegate_Handle(OnDestroySessionCompleteDelegate);//

执行销毁会话Session-DestroySession(NAME_GameSession);}}

}void

URPCInstance::OnCreateSessionComplete(FName

SessionName,

OnlineSub-GetSessionInterface();if

(Session.IsValid())

解绑创建会话完成回调函数Session-ClearOnCreateSessionCompleteDelegate_Handle(OnCreateSessionCompleteDelegateHandle);//

(bWasSuccessful)

绑定开启会话委托OnStartSessionCompleteDelegateHandle

Session-AddOnStartSessionCompleteDelegate_Handle(OnStartSessionCompleteDelegate);//

执行开启会话Session-StartSession(NAME_GameSession);}elseDDH::Debug()

CreateSession

URPCInstance::OnStartOnlineGameComplete(FName

SessionName,

OnlineSub-GetSessionInterface();if

(Session.IsValid())

注销开启会话委托绑定Session-ClearOnStartSessionCompleteDelegate_Handle(OnStartSessionCompleteDelegateHandle);if

(bWasSuccessful)

服务端跳转场景UGameplayStatics::OpenLevel(PlayerController-GetWorld(),

FName(GameMap),

FString(listen));}elseDDH::Debug()

StartSession

URPCInstance::OnFindSessionsComplete(bool

bWasSuccessful)

OnlineSub-GetSessionInterface();if

(Session.IsValid())

取消寻找会话委托绑定Session-ClearOnStartSessionCompleteDelegate_Handle(OnStartSessionCompleteDelegateHandle);if

(bWasSuccessful)

SearchObject-SearchResults.Num()

{DDH::Debug()

委托OnJoinSessionCompleteDelegateHandle

Session-AddOnJoinSessionCompleteDelegate_Handle(OnJoinSessionCompleteDelegate);//

执行加入

SessionSession-JoinSession(*UserID,

NAME_GameSession,

SearchObject-SearchResults[0]);}elseDDH::Debug()

Find

URPCInstance::OnJoinSessionComplete(FName

SessionName,

EOnJoinSessionCompleteResult::Type

Result)

OnlineSub-GetSessionInterface();if

(Session.IsValid())

取消加入会话委托绑定Session-ClearOnJoinSessionCompleteDelegate_Handle(OnJoinSessionCompleteDelegateHandle);//

如果加入成功if

EOnJoinSessionCompleteResult::Success)

{//

(Session-GetResolvedConnectString(NAME_GameSession,

ConnectString))

客户端切换到服务器的关卡PlayerController-ClientTravel(ConnectString,

DDH::Debug()

URPCInstance::OnDestroySessionComplete(FName

SessionName,

OnlineSub-GetSessionInterface();if

(Session.IsValid())

注销销毁会话委托Session-ClearOnDestroySessionCompleteDelegate_Handle(OnDestroySessionCompleteDelegateHandle);//

其他逻辑...}}

执行相应逻辑了然后在接下来的逻辑里解绑委托。

这里笔者倾向于将这一过程理解为

已经将网络模块的细枝末节都为我们封装好了我们只需要知道如何使用就够了当然喜欢探索的读者也可以查阅源码去深入理解。

在主界面控制器里注册自己到

CastURPCInstance(UGameplayStatics::GetGameInstance(GetWorld()));RPCInstance-AssignPlayerController(this);UClass*

MenuWidgetClass

TEXT(WidgetBlueprint/Game/Blueprint/MenuWidget_BP.MenuWidget_BP_C));UMenuWidget*

MenuWidget

CreateWidgetUMenuWidget(GetWorld(),

MenuWidgetClass);MenuWidget-AddToViewport();MenuWidget-AssignRPCInstance(RPCInstance);

RPCInstance

PCHUsageMode.UseExplicitOrSharedPCHs;PublicDependencyModuleNames.AddRange(new

string[]

添加动态加载模组DynamicallyLoadedModuleNames.AddRange(new

string[]

{OnlineSubsystemNull,});}编译后在项目设置里将默认的

GameInstance

3。

运行后在服务端创建服务器创建成功让另外两个客户端加入服务器也能进入成功。

并且在服务端按

不过如果在客户端创建服务器另外一个客户端可以加入但是服务端加入会显示找到会话和加入成功但不会跳转到

RPC