织梦网站app生成器,织梦的网站模板免费吗,国际网站开发客户,做软装什么网站可以p20 首先我们现在有一个多人游戏的系统类MultiplayerSessionsSubsystem 在这个系统内提供了很多会话系统的接口SessionInterface 当现在我们有一些SessionInterfaceDelegates的委托,这个委托的来源是SessionInterface,所以我们使用的委托可以接收到来自SessionInterface的消息(…p20 首先我们现在有一个多人游戏的系统类MultiplayerSessionsSubsystem 在这个系统内提供了很多会话系统的接口SessionInterface 当现在我们有一些SessionInterfaceDelegates的委托,这个委托的来源是SessionInterface,所以我们使用的委托可以接收到来自SessionInterface的消息(回调/Callbacks) 在上节课,我们创建了菜单类MenuClass,调用的是MultiplayerSessionsSubsystem的函数 当我们在菜单类调用MultiplayerSessionsSubsystem的函数的时候,实际上是调用了SessionInterface的接口函数,这个时候SessionInterface就会通过SessionInterfaceDelegates这个委托给MultiplayerSessionsSubsystem发送消息(也就是回调,Callback Responds) 但是这个时候问题出现了,我们没有办法把SessionInterface返回给MultlplayerSubsystem内的消息(也就是CallbackResponds)发送给MenuClass 解决这个问题的方法是创建属于我们自己的委托,用来接受从MultiPlayerSubsystem返回来的消息 理解了含义后就可以开始学习了
Menu.h
// Fill out your copyright notice in the Description page of Project Settings. #pragma once #include CoreMinimal.h #include Blueprint/UserWidget.h #include BaseMenu.generated.h /** * */ class UButton; UCLASS() class MULTIPLAYERSESSION_API UBaseMenu : public UUserWidget { GENERATED_BODY() protected: virtual bool Initialize() override; virtual void NativeDestruct() override; /*这里创建用来对应MultiPlayerOnCreateSessionComplete的函数*/ UFUNCTION() void OnCreateSession(bool bWasSuccessful); public: UFUNCTION(BlueprintCallable) void MenuSetup(int SetupNumPublicConnections 4,FString SetupMatchType TEXT(FreeForAll)); void _DebugLog(FColor DisplayColor, const FString DebugMessage); private: //将指针与按钮绑定起来,这里的绑定必须要指针变量名称和UMG的名称完全一样 UPROPERTY(meta(BindWidget)) UButton* HostButton; UPROPERTY(meta(BindWidget)) UButton* JoinButton; UFUNCTION() void HostButtonClicked(); UFUNCTION() void JoinButtonClincked(); UFUNCTION() void MenuTearDown(); class UMultiPlayerSessionSubsystem* MultiPlayerSessionSubsystem; int32 NumPublicConnections{4}; FString MatchType{TEXT(FreeForAll)}; };
.cpp
// Fill out your copyright notice in the Description page of Project Settings. #include BaseMenu.h #include MultiPlayerSession/Public/MultiPlayerSessionSubsystem.h #include Components/Button.h bool UBaseMenu::Initialize() { if(!Super::Initialize()) { return false; } if(HostButton) { HostButton-OnClicked.AddDynamic(this,UBaseMenu::HostButtonClicked); } if(JoinButton) { JoinButton-OnClicked.AddDynamic(this,UBaseMenu::JoinButtonClincked); } return true; } void UBaseMenu::NativeDestruct() { Super::NativeDestruct(); } void UBaseMenu::OnCreateSession(bool bWasSuccessful) { if(bWasSuccessful) { _DebugLog(FColor::Green,TEXT(CreateSession Successful)); } UWorld* World GetWorld(); if(World) { World-ServerTravel(/Game/ThirdPerson/Maps/Lobby?listen); } } void UBaseMenu::MenuSetup(int SetupNumPublicConnections ,FString SetupMatchType) { NumPublicConnections SetupNumPublicConnections; MatchType SetupMatchType; AddToViewport(); SetVisibility(ESlateVisibility::Visible); bIsFocusable true; UWorld* World GetWorld(); if(World) { APlayerController* PlayerController World-GetFirstPlayerController(); if(PlayerController) { FInputModeUIOnly InputModeUIOnly; InputModeUIOnly.SetWidgetToFocus(TakeWidget()); InputModeUIOnly.SetLockMouseToViewportBehavior(EMouseLockMode::DoNotLock); PlayerController-SetInputMode(InputModeUIOnly); PlayerController-SetShowMouseCursor(true); } } UGameInstance* GameInstance GetGameInstance(); if(GameInstance) { MultiPlayerSessionSubsystem GameInstance-GetSubsystemUMultiPlayerSessionSubsystem(); } if(MultiPlayerSessionSubsystem) { MultiPlayerSessionSubsystem-MultiPlayerOnCreateSessionComplete.AddDynamic(this,ThisClass::OnCreateSession); } } void UBaseMenu::_DebugLog(FColor DisplayColor, const FString DebugMessage) { if(GEngine) { GEngine-AddOnScreenDebugMessage(-1,15.f,DisplayColor,DebugMessage); } } void UBaseMenu::HostButtonClicked() { if(MultiPlayerSessionSubsystem) { MultiPlayerSessionSubsystem-CreateSession(NumPublicConnections,MatchType); } _DebugLog(FColor::Blue,FString::Printf(TEXT(Create Session Success))); } void UBaseMenu::JoinButtonClincked() { _DebugLog(FColor::Blue,FString::Printf(TEXT(Join Button Click))); } void UBaseMenu::MenuTearDown() { UWorld* World GetWorld(); RemoveFromParent(); APlayerController* PlayerController World-GetFirstPlayerController(); FInputModeGameAndUI InputModeGameAndUI; PlayerController-SetInputMode(InputModeGameAndUI); PlayerController-SetShowMouseCursor(false); }
MultiplayerSessionSubsystem.h
// Fill out your copyright notice in the Description page of Project Settings. #pragma once #include CoreMinimal.h #include Subsystems/GameInstanceSubsystem.h #include Interfaces/OnlineSessionInterface.h #include MultiPlayerSessionSubsystem.generated.h /** * 这里是我们自定义的委托 */ DECLARE_DYNAMIC_MULTICAST_DELEGATE_OneParam(FMultiPlayerOnCreateSessionComplete ,bool, bWasSuccessful); UCLASS() class UMultiPlayerSessionSubsystem : public UGameInstanceSubsystem { GENERATED_BODY() public: UMultiPlayerSessionSubsystem(); /* * 这里是一个句柄,让菜单类可以访问Subsystem */ void CreateSession(int32 NumPublicConnections,FString MatchType); void FindSession(int32 MaxSearchResults); void JoinSession(const FOnlineSessionSearchResult SessionResults); void DestroySession(); void StartSession(); /* * 这是给菜单类做的回调委托 */ FMultiPlayerOnCreateSessionComplete MultiPlayerOnCreateSessionComplete; protected: /* * 这里是委托 */ void CreateSessionComplete(FName SessionName, bool bWasSuccessful); void FindSessionsComplete(bool bWasSuccessful); void JoinSessionComplete(FName SessionName, EOnJoinSessionCompleteResult::Type Result); void DestroySessionComplete(FName SessionName, bool bWasSuccessful); void StartSessionComplete(FName SessionName, bool bWasSuccessful); private: IOnlineSessionPtr OnlineSessionInterface; TSharedPtrFOnlineSessionSettings LastSessionSettings; /* * 添加OnlineSession委托到列表内 * 我们的游玩系统内部回调绑定到这里 * */ FOnCreateSessionCompleteDelegate CreateSessionCompleteDelegate; FDelegateHandle CreateSessionCompleteDelegate_Handle; FOnFindSessionsCompleteDelegate FindSessionsCompleteDelegate; FDelegateHandle FindSessionsCompleteDelegate_Handle; FOnJoinSessionCompleteDelegate JoinSessionCompleteDelegate; FDelegateHandle JoinSessionCompleteDelegate_Handle; FOnDestroySessionCompleteDelegate DestroySessionCompleteDelegate; FDelegateHandle DestroySessionCompleteDelegate_Handle; FOnStartSessionCompleteDelegate StartSessionCompleteDelegate; FDelegateHandle StartSessionCompleteDelegate_Handle; };
.cpp
// Fill out your copyright notice in the Description page of Project Settings. #include MultiPlayerSessionSubsystem.h #include OnlineSessionSettings.h #include OnlineSubsystem.h UMultiPlayerSessionSubsystem::UMultiPlayerSessionSubsystem(): CreateSessionCompleteDelegate(FOnCreateSessionCompleteDelegate::CreateUObject(this,ThisClass::CreateSessionComplete)), FindSessionsCompleteDelegate(FOnFindSessionsCompleteDelegate::CreateUObject(this,ThisClass::FindSessionsComplete)), JoinSessionCompleteDelegate(FOnJoinSessionCompleteDelegate::CreateUObject(this,ThisClass::JoinSessionComplete)), DestroySessionCompleteDelegate(FOnDestroySessionCompleteDelegate::CreateUObject(this,ThisClass::DestroySessionComplete)), StartSessionCompleteDelegate(FOnStartSessionCompleteDelegate::CreateUObject(this,ThisClass::StartSessionComplete)) { IOnlineSubsystem* OnlineSubsystem IOnlineSubsystem::Get(); if(OnlineSubsystem) { OnlineSessionInterface OnlineSubsystem-GetSessionInterface(); } } void UMultiPlayerSessionSubsystem::CreateSession(int32 NumPublicConnections, FString MatchType) { if(!OnlineSessionInterface.IsValid()) { return; } auto ExistingSession OnlineSessionInterface-GetNamedSession(NAME_GameSession); if(ExistingSession ! nullptr) { OnlineSessionInterface-DestroySession(NAME_GameSession); } //存放创建委托 CreateSessionCompleteDelegate_Handle OnlineSessionInterface-AddOnCreateSessionCompleteDelegate_Handle(CreateSessionCompleteDelegate); LastSessionSettings MakeShareable(new FOnlineSessionSettings()); LastSessionSettings-bIsLANMatch IOnlineSubsystem::Get()-GetSubsystemName() NULL ? true:false; //最多4人 LastSessionSettings-NumPublicConnections NumPublicConnections; //允许其他玩家加入 LastSessionSettings-bAllowJoinInProgress true; //允许好友加入 LastSessionSettings-bAllowJoinViaPresence true; //线上公开 LastSessionSettings-bShouldAdvertise true; //显示用户状态 LastSessionSettings-bUsesPresence true; //使用第三方平台 LastSessionSettings-bUseLobbiesIfAvailable true; LastSessionSettings-Set(FName(MatchType),MatchType,EOnlineDataAdvertisementType::ViaOnlineServiceAndPing); const ULocalPlayer* LocalPlayer GetWorld()-GetFirstLocalPlayerFromController(); if(OnlineSessionInterface-CreateSession(*LocalPlayer-GetPreferredUniqueNetId(), NAME_GameSession , *LastSessionSettings)) { /*这里是创建失败*/ OnlineSessionInterface-ClearOnCreateSessionCompleteDelegate_Handle(CreateSessionCompleteDelegate_Handle); /*在这里广播*/ MultiPlayerOnCreateSessionComplete.Broadcast(false); } } void UMultiPlayerSessionSubsystem::FindSession(int32 MaxSearchResults) { } void UMultiPlayerSessionSubsystem::JoinSession(const FOnlineSessionSearchResult SessionResults) { } void UMultiPlayerSessionSubsystem::DestroySession() { } void UMultiPlayerSessionSubsystem::StartSession() { } void UMultiPlayerSessionSubsystem::CreateSessionComplete(FName SessionName, bool bWasSuccessful) { /*当成功创建房间的时候,删除创建房间的句柄*/ if(OnlineSessionInterface) { OnlineSessionInterface-ClearOnCreateSessionCompleteDelegate_Handle(CreateSessionCompleteDelegate_Handle); } MultiPlayerOnCreateSessionComplete.Broadcast(bWasSuccessful); } void UMultiPlayerSessionSubsystem::FindSessionsComplete(bool bWasSuccessful) { } void UMultiPlayerSessionSubsystem::JoinSessionComplete(FName SessionName, EOnJoinSessionCompleteResult::Type Result) { } void UMultiPlayerSessionSubsystem::DestroySessionComplete(FName SessionName, bool bWasSuccessful) { } void UMultiPlayerSessionSubsystem::StartSessionComplete(FName SessionName, bool bWasSuccessful) { }
