UE5 C++ TPS开发 学习记录(10

p22

这节课把创建,查找,加入游戏房间的菜单类,以及插件内的系统类给补完了.说实话这节课有点绕,因为需要一直使用委托进行传值,先由菜单类Menu向系统类Subsystem发送函数传值请求,然后监听Subsystem的委托回调,同时系统类Subsystem向Session的工具发送请求,监听回调,再返回给Menu类进行传值.

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); DECLARE_MULTICAST_DELEGATE_TwoParams(FMultiPlayerOnFindSessionComplete, const TArray<FOnlineSessionSearchResult>& SessionSearchResult , bool bWasSuccessful); DECLARE_MULTICAST_DELEGATE_OneParam(FMultiPlayerOnJoinSessionComplete, EOnJoinSessionCompleteResult::Type Result); DECLARE_DYNAMIC_MULTICAST_DELEGATE_OneParam(FMultiPlayerOnDestroySessionComplete ,bool, bWasSuccessful); DECLARE_DYNAMIC_MULTICAST_DELEGATE_OneParam(FMultiPlayerOnStartSessionComplete ,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; FMultiPlayerOnFindSessionComplete MultiPlayerOnFindSessionComplete; FMultiPlayerOnJoinSessionComplete MultiPlayerOnJoinSessionComplete; FMultiPlayerOnDestroySessionComplete MultiPlayerOnDestroySessionComplete; FMultiPlayerOnStartSessionComplete MultiPlayerOnStartSessionComplete; 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: //查找会话设置 TSharedPtr<FOnlineSessionSearch> LastSessionSearch; IOnlineSessionPtr OnlineSessionInterface; TSharedPtr<FOnlineSessionSettings> 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; };

MultiPlayerSessionSubsystem.cpp

// Fill out your copyright notice in the Description page of Project Settings. #include "MultiPlayerSessionSubsystem.h" #include "OnlineSessionSettings.h" #include "OnlineSubsystem.h" #include "Online/OnlineSessionNames.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) { if(!OnlineSessionInterface.IsValid()) { return; } //这里将我们的委托设置成SessionInterface的句柄使用 FindSessionsCompleteDelegate_Handle = OnlineSessionInterface->AddOnFindSessionsCompleteDelegate_Handle(FindSessionsCompleteDelegate); //添加查询委托 OnlineSessionInterface->AddOnFindSessionsCompleteDelegate_Handle(FindSessionsCompleteDelegate); //设置查找 LastSessionSearch = MakeShareable(new FOnlineSessionSearch()); LastSessionSearch->MaxSearchResults = 10000; LastSessionSearch->bIsLanQuery= LastSessionSettings->bIsLANMatch = IOnlineSubsystem::Get()->GetSubsystemName() == "NULL" ? true:false; //设置查询设置 LastSessionSearch->QuerySettings.Set(SEARCH_PRESENCE,true,EOnlineComparisonOp::Equals); //获得本地的第一个玩家 const ULocalPlayer* LocalPlayer = GetWorld()->GetFirstLocalPlayerFromController(); //使用本地的第一个玩家的URL和查找设置进行查找,当查找为false或者空的时候删除句柄 if(!OnlineSessionInterface->FindSessions(*LocalPlayer->GetPreferredUniqueNetId(),LastSessionSearch.ToSharedRef())) { //删除掉句柄 OnlineSessionInterface->ClearOnFindSessionsCompleteDelegate_Handle(FindSessionsCompleteDelegate_Handle); MultiPlayerOnFindSessionComplete.Broadcast(TArray<FOnlineSessionSearchResult>(),false); } } void UMultiPlayerSessionSubsystem::JoinSession(const FOnlineSessionSearchResult& SessionResults) { if(!OnlineSessionInterface.IsValid()) { MultiPlayerOnJoinSessionComplete.Broadcast(EOnJoinSessionCompleteResult::UnknownError); return; } JoinSessionCompleteDelegate_Handle = OnlineSessionInterface->AddOnJoinSessionCompleteDelegate_Handle(JoinSessionCompleteDelegate); //获得本地的第一个玩家 const ULocalPlayer* LocalPlayer = GetWorld()->GetFirstLocalPlayerFromController(); //调用JoinSession,并且加入的时候调用OnJoinSessionCompleteDelegate这个委托 if(!OnlineSessionInterface->JoinSession(*LocalPlayer->GetPreferredUniqueNetId(),NAME_GameSession,SessionResults)) { MultiPlayerOnJoinSessionComplete.Broadcast(EOnJoinSessionCompleteResult::UnknownError); } } 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) { if(OnlineSessionInterface) { OnlineSessionInterface->ClearOnFindSessionsCompleteDelegate_Handle(FindSessionsCompleteDelegate_Handle); } if(LastSessionSearch->SearchResults.Num()<=0) { //找到了玩家后删除掉句柄 OnlineSessionInterface->ClearOnFindSessionsCompleteDelegate_Handle(FindSessionsCompleteDelegate_Handle); return; } MultiPlayerOnFindSessionComplete.Broadcast(LastSessionSearch->SearchResults,bWasSuccessful); } void UMultiPlayerSessionSubsystem::JoinSessionComplete(FName SessionName, EOnJoinSessionCompleteResult::Type Result) { if(OnlineSessionInterface) { OnlineSessionInterface->ClearOnJoinSessionCompleteDelegate_Handle(JoinSessionCompleteDelegate_Handle); } MultiPlayerOnJoinSessionComplete.Broadcast(Result); } void UMultiPlayerSessionSubsystem::DestroySessionComplete(FName SessionName, bool bWasSuccessful) { } void UMultiPlayerSessionSubsystem::StartSessionComplete(FName SessionName, bool bWasSuccessful) { }

BaseMenu.h

// Fill out your copyright notice in the Description page of Project Settings. #pragma once #include "CoreMinimal.h" #include "Blueprint/UserWidget.h" #include "Interfaces/OnlineSessionInterface.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); void OnFindSession(const TArray<FOnlineSessionSearchResult>& SessionSearchResult , bool bWasSuccessful); void OnJoinSession(EOnJoinSessionCompleteResult::Type Result); UFUNCTION() void OnDestroySession(bool bWasSuccessful); UFUNCTION() void OnStartSession(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 "OnlineSessionSettings.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::OnFindSession(const TArray<FOnlineSessionSearchResult>& SessionSearchResult, bool bWasSuccessful) { if(MultiPlayerSessionSubsystem==nullptr) { return; } for(auto Result : SessionSearchResult) { FString SettingValue; Result.Session.SessionSettings.Get(FName("MatchType"),SettingValue); if(SettingValue == MatchType) { MultiPlayerSessionSubsystem->JoinSession(Result); return; } } } void UBaseMenu::OnJoinSession(EOnJoinSessionCompleteResult::Type Result) { //加入游戏 IOnlineSubsystem* OnlineSubsystem = IOnlineSubsystem::Get(); if(OnlineSubsystem) { IOnlineSessionPtr OnlineSessionInterface = OnlineSubsystem->GetSessionInterface(); if(OnlineSessionInterface.IsValid()) { FString Address; // if(OnlineSessionInterface->GetResolvedConnectString(NAME_GameSession,Address)) { APlayerController* PlayerController = GetGameInstance()->GetFirstLocalPlayerController(); if(PlayerController) { PlayerController->ClientTravel(Address,ETravelType::TRAVEL_Absolute); } } } } } void UBaseMenu::OnDestroySession(bool bWasSuccessful) { } void UBaseMenu::OnStartSession(bool bWasSuccessful) { } 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->GetSubsystem<UMultiPlayerSessionSubsystem>(); } if(MultiPlayerSessionSubsystem) { MultiPlayerSessionSubsystem->MultiPlayerOnCreateSessionComplete.AddDynamic(this,&ThisClass::OnCreateSession); /*当委托是静态的时候需要使用 AddUObject */ MultiPlayerSessionSubsystem->MultiPlayerOnFindSessionComplete.AddUObject(this,&ThisClass::OnFindSession); MultiPlayerSessionSubsystem->MultiPlayerOnJoinSessionComplete.AddUObject(this,&ThisClass::OnJoinSession); MultiPlayerSessionSubsystem->MultiPlayerOnDestroySessionComplete.AddDynamic(this,&ThisClass::OnDestroySession); MultiPlayerSessionSubsystem->MultiPlayerOnStartSessionComplete.AddDynamic(this,&ThisClass::OnStartSession); } } 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() { //点击加入按钮 if(MultiPlayerSessionSubsystem) { MultiPlayerSessionSubsystem->FindSession(10000); } } void UBaseMenu::MenuTearDown() { UWorld* World = GetWorld(); RemoveFromParent(); APlayerController* PlayerController = World->GetFirstPlayerController(); FInputModeGameAndUI InputModeGameAndUI; PlayerController->SetInputMode(InputModeGameAndUI); PlayerController->SetShowMouseCursor(false); }