F15.AssetLoad的几种方法

Mr.Si大约 1 分钟

资源加载的几种写法

前置

食用本文建议先了解类和对象的介绍！直通车

异步

//全局Handle
private:
	TSharedPtr<FStreamableHandle> Handle;
void UDataDefinitionManager::AsyncCollectionDefinitions()
{
	TArray<FPrimaryAssetId> AssetIds;
	const TArray<FName> LoadBundles;
	
	UKismetSystemLibrary::GetPrimaryAssetIdList(FPrimaryAssetType(CollectionDefinitionTypeName), AssetIds);

	if (AssetIds.IsEmpty())
	{
		UE_LOG(LogTemp, Warning, TEXT("No assets found for type %s"), *CollectionDefinitionTypeName.ToString());
		return;
	}
	
	UnloadAssets();
	
	UAssetManager& Manager = UAssetManager::Get();
	
	const FStreamableDelegate& NewDelegate = FStreamableDelegate::CreateUObject(this, &UDataDefinitionManager::CollectionCompleted);
	
	Handle = Manager.LoadPrimaryAssets(AssetIds,LoadBundles,NewDelegate);
	
}

void UDataDefinitionManager::CollectionCompleted()
{
	TArray<UObject*> Loaded;

	const UAssetManager& Manager = UAssetManager::Get();
	//也可以直接
	Manager.GetPrimaryAssetObjectList(FPrimaryAssetType(CollectionDefinitionTypeName),Loaded);

	if(!Handle.IsValid()) return;
	Handle->GetLoadedAssets(Loaded);
	
	if(Loaded.IsEmpty()) return;
	
	CachedFragments.Empty();
	for (UObject* LoadedObject : Loaded)
	{
		if (auto DataDefinition = Cast<UDataDefinition>(LoadedObject))
		{
			CachedFragments.Add(DataDefinition->Name,DataDefinition);
		}
	}
	OnDefinitionsLoaded.Broadcast();
}