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RPG7.准备GAS的工作

news 来源：原创 2025/5/25 9:45:45

1.启动项目，为项目添加gameplayability插件

2.添加abilitysystemcomponent的c++类

3.添加attributeset的c++类

4.往build.cs内添加模块

5.进入CharacterBase内，添加gameplayasystem和attributbeset，覆写PossessedBy()和GetAbilitysystemcomponent()

class ARPG_GRIVITY_API ACharacterBase : public ACharacter, public IAbilitySystemInterface
{GENERATED_BODY()public:ACharacterBase();//创建能力组件的获取方法UXMBAbilitySystemComponent* GetXMBAbilitySystemComponent() const {return  XMBAbilitySystemComponent;}//创建属性集的获取方法UXMBAttributeSet* GetXMBAttributeSet() const {return  XMBAttributeSet;}//Begin IAbilitySystemInterface Interfacevirtual UAbilitySystemComponent* GetAbilitySystemComponent() const override;//End IAbilitySystemInterface Interfaceprotected://创建能力组件UPROPERTY(VisibleAnywhere, BlueprintReadOnly, Category = "AbilitySystem")UXMBAbilitySystemComponent* XMBAbilitySystemComponent;//创建属性集UPROPERTY(VisibleAnywhere, BlueprintReadOnly, Category = "AbilitySystem")UXMBAttributeSet* XMBAttributeSet;//Begin Apawn Interfacevirtual void PossessedBy(AController* NewController) override;//End Apawn Interface
};

6.在构造函数里创建，覆写函数体内


#include "Character/CharacterBase.h"
#include "AbilitySystem/XMBAttributeSet.h"
#include "AbilitySystem/XMBAbilitySystemComponent.h"ACharacterBase::ACharacterBase()
{PrimaryActorTick.bCanEverTick = false;//初始禁用 Tick，适合需要手动控制更新的场景。PrimaryActorTick.bStartWithTickEnabled = false;//禁用贴花接收，适用于性能优化或特定视觉需求。GetMesh()->bReceivesDecals = false;XMBAbilitySystemComponent = CreateDefaultSubobject<UXMBAbilitySystemComponent>(TEXT("XMBAbilitySystemComponent"));XMBAttributeSet = CreateDefaultSubobject<UXMBAttributeSet>(TEXT("XMBAttributeSet"));
}UAbilitySystemComponent* ACharacterBase::GetAbilitySystemComponent() const
{return GetXMBAbilitySystemComponent();
}void ACharacterBase::PossessedBy(AController* NewController)
{Super::PossessedBy(NewController);if (XMBAbilitySystemComponent){XMBAbilitySystemComponent->InitAbilityActorInfo(this, this);}}

7.进入到玩家控制的角色内（XMBCharacter）,对PossessedBy覆写

//Begin Apawn Interfacevirtual void PossessedBy(AController* NewController) override;//End Apawn Interface

void AXMBCharacter::PossessedBy(AController* NewController)
{Super::PossessedBy(NewController);if (XMBAbilitySystemComponent && XMBAttributeSet){GEngine->AddOnScreenDebugMessage(-1,5.f, FColor::Red, FString::Printf(TEXT("Owner: %s, Avatar : %s"),*XMBAbilitySystemComponent->GetOwnerActor()->GetActorLabel(),*XMBAbilitySystemComponent->GetAvatarActor()->GetActorLabel()));}
}

8.启动，能从日志里看到信息

9.我们需要给AbilitySystemComponent赋予Ability，当玩家尝试激活Ability时，实际上是从ASC中激活能力。对于激活的这一部分，我们可以自定义Ability的激活方式。

继续创建一个GameplayAbility的c++类，然后在其内创建一个激活策略的枚举，覆写两个函数

// Fill out your copyright notice in the Description page of Project Settings.#pragma once#include "CoreMinimal.h"
#include "Abilities/GameplayAbility.h"
#include "XMBGameplayAbility.generated.h"//创建一个激活能力的策略枚举
UENUM()
enum class EXMBAbilityActivationPolicy : uint8
{OnTriggered,OnGiven
};
/*** */
UCLASS()
class ARPG_GRIVITY_API UXMBGameplayAbility : public UGameplayAbility
{GENERATED_BODY()public:protected://设置激活策略UPROPERTY(EditDefaultsOnly, Category = "XMBAbility")EXMBAbilityActivationPolicy AbilityActivationPolicy = EXMBAbilityActivationPolicy::OnTriggered;//~ Begin UGameplayAbility Interfacevirtual void OnGiveAbility(const FGameplayAbilityActorInfo* ActorInfo, const FGameplayAbilitySpec& Spec) override;virtual void EndAbility(const FGameplayAbilitySpecHandle Handle, const FGameplayAbilityActorInfo* ActorInfo, const FGameplayAbilityActivationInfo ActivationInfo, bool bReplicateEndAbility, bool bWasCancelled) override;//~ End UGameplayAbility Interface};

// Fill out your copyright notice in the Description page of Project Settings.#include "AbilitySystem/Abilities/XMBGameplayAbility.h"#include "AbilitySystem/XMBAbilitySystemComponent.h"//在Ability被分配给AbilitySystemComponent后立即调用
void UXMBGameplayAbility::OnGiveAbility(const FGameplayAbilityActorInfo* ActorInfo, const FGameplayAbilitySpec& Spec)
{Super::OnGiveAbility(ActorInfo, Spec);if (AbilityActivationPolicy == EXMBAbilityActivationPolicy::OnGiven){if (ActorInfo && !Spec.IsActive()){//Spec.Handle是FGameplayAbilitySpec对象的句柄，表示一个具体的能力实例ActorInfo->AbilitySystemComponent->TryActivateAbility(Spec.Handle);}}
}void UXMBGameplayAbility::EndAbility(const FGameplayAbilitySpecHandle Handle,const FGameplayAbilityActorInfo* ActorInfo, const FGameplayAbilityActivationInfo ActivationInfo,bool bReplicateEndAbility, bool bWasCancelled)
{Super::EndAbility(Handle, ActorInfo, ActivationInfo, bReplicateEndAbility, bWasCancelled);if (AbilityActivationPolicy == EXMBAbilityActivationPolicy::OnGiven){if (ActorInfo){//Handle是FGameplayAbilitySpec对象的句柄，表示要清除的能力实例。ActorInfo->AbilitySystemComponent->ClearAbility(Handle);}}
}

10.启动引擎，右键即可创建一个刚才自己创建的gameplayability类，