使用GameplayEffect初始化属性值-ApplyGameplayEffectSpecToTarget

example：

UPROPERTY(BlueprintReadOnly,EditAnywhere,Category = "Attributes")
TSubclassOf<UGameplayEffect> DefaultPrimaryAttributes;

void InitializePrimaryAttributes()const;

void AAuraCharacterBase::InitializePrimaryAttributes() const
{
    check(IsValid(GetAbilitySystemComponent()));
    check(DefaultPrimaryAttributes);
    const FGameplayEffectContextHandle ContextHandle = GetAbilitySystemComponent()->MakeEffectContext();
    const FGameplayEffectSpecHandle SpecHandle = GetAbilitySystemComponent()->MakeOutgoingSpec(DefaultPrimaryAttributes,1.f,ContextHandle);
    GetAbilitySystemComponent()->ApplyGameplayEffectSpecToTarget(*SpecHandle.Data.Get(),GetAbilitySystemComponent());
}