UserData

1. 定义 UserData

   UCLASS()
   class ADVMOD_API UStaticMeshUserData : public UAssetUserData
   {
   	GENERATED_BODY()
   	
   public:
   	UPROPERTY(EditAnywhere)
   	FString MeshPath;
   };

2. 新建，添加

   UStaticMeshUserData* StaticMeshUserData = StaticMesh->GetAssetUserData<UStaticMeshUserData>();
   if (!StaticMeshUserData)
   {
   	StaticMeshUserData = NewObject<UStaticMeshUserData>(StaticMesh, UStaticMeshUserData::StaticClass(), NAME_None, RF_Transactional);
   	StaticMeshUserData->MeshPath = StaticMesh->GetPathName();
   	StaticMeshUserData->PostEditChange();
   
   	StaticMesh->AddAssetUserData(StaticMeshUserData);
   	StaticMesh->PostEditChange();
   	StaticMesh->MarkPackageDirty();
   }

3. 获取

   UAssetUserData* Data = Obj->GetAssetUserDataOfClass(UStaticMeshUserData::StaticClass());
   UStaticMeshUserData* UserData = Cast<UStaticMeshUserData>(Data);
   // 或
   UStaticMeshUserData* StaticMeshUserData = StaticMesh->GetAssetUserData<UStaticMeshUserData>();