【虚幻4学习笔记】使用蓝图CDO踩坑

覆写AddReferencedObjects(UObject * InThis, FReferenceCollector & Collector)函数

void UYourObject::AddReferencedObjects(UObject * InThis, FReferenceCollector & Collector)
{
	UClass* This = InThis->GetClass();
	for (auto& Inter : This->Interfaces)
	{
		Collector.AddReferencedObject(Inter.Class, This);
	}
	//利用反射迭代UClass中的函数
	for (TFieldIterator<UFunction> i(This); i; ++i)
	{
		UFunction* func = *i;
		Collector.AddReferencedObject(func, This);
		//查找蓝图事件图表对应的函数
		if (func ->GetName().Contains("ExecuteUbergraph_BP"))
		{
			//遍历每个变量
			for (TFieldIterator<UProperty> j(func); j; ++j)
			{
				UProperty* param = *j;
				//标记成略过序列化，Disregard for GC object断言只会判断需要序列化的Object（反射中的每个变量也是UObject）
				param->PropertyFlags |= CPF_SkipSerialization;
				Collector.AddReferencedObject(param, This);
			}
		}
	}

	Collector.AddReferencedObject(This->ClassWithin, This);
	Collector.AddReferencedObject(This->ClassGeneratedBy, This);

	if (!Collector.IsIgnoringArchetypeRef())
	{
		Collector.AddReferencedObject(This->ClassDefaultObject, This);
	}
	Super::AddReferencedObjects(This, Collector);
}