UE5 编辑器下添加组件

定义一个CallInEditor的函数：

UFUNCTION(BlueprintCallable,CallInEditor)voidAddGenerateComponent();

直接AddComponent，会在移动后消失，且反射没法找到生成的组件。这里需要用到USubobjectDataSubsystem，需要在Build.cs内部添加模块：SubobjectDataInterface，代码如下：

voidAAEGenerator::AddGenerateComponent(){if(USubobjectDataSubsystem*Subsystem=Cast<USubobjectDataSubsystem>(GEngine->GetEngineSubsystemBase(USubobjectDataSubsystem::StaticClass()))){TArray<FSubobjectDataHandle>OutArray;Subsystem->GatherSubobjectData(this,OutArray);if(OutArray.Num()>0){FAddNewSubobjectParams Params;Params.ParentHandle=OutArray[0];Params.NewClass=UGeneratorComponent::StaticClass();FText FailedReason;FSubobjectDataHandle Handle=Subsystem->AddNewSubobject(Params,FailedReason);if(Handle.GetData()){if(UGeneratorComponent*GeneratorComponent=const_cast<UGeneratorComponent*>(Cast<UGeneratorComponent>(Handle.GetData()->GetObject()))){GeneratorComponent->AttachToComponent(Root,FAttachmentTransformRules::KeepRelativeTransform,NAME_None);GeneratorComponent->SetRelativeTransform(FTransform::Identity);GeneratorComponent->RegisterComponent();}}}}}