Cached asset bundle folder structure

Hi,

I'm new to asset bundles, and got to where I actually download bundles and have them in the cache. Now, I'd like to load them later on into memory using AssetBundle.LoadFromFile(bundlePath).

But to get the right bundlePath, I had to Path.Combine(Caching.defaultCache.path, bundleName, bundleHash, "__data") because this is the structure bundles get stored in inside the cache folder. FYI, there is another file next to each "__data" file called "__info".

My question is: is this right? Is this a reliable way to construct the path and load the bundles from files that will work across different platforms? I'm on Unity 2020.3, building for StandaloneOSX, but will build for Android and iOS soon.

 

Anyone?

 

Hello,
to load from streamingAssets folder I used:

Code (CSharp):

1.  
2. AssetBundleCreateRequest abcr = AssetBundle.LoadFromFileAsync(System.IO.Path.Combine(Application.streamingAssetsPath, abName));
3.  

where abName is for instance: "prefabs"


To load from the web and use cache

Code (CSharp):

1. Hash128 hash = assetBundleManifest.GetAssetBundleHash(abName);
2.      
3. CachedAssetBundle cached = new CachedAssetBundle(abName.Replace(".", "_"), hash);
4.                 using (UnityWebRequest uwr = UnityWebRequestAssetBundle.GetAssetBundle(url, cached, 0))
5.                 { ... }

I embed the manifest created for Android, or for Ios to have the hash of assetBundles. This way I can clean old assetBundles when I upload a new version on my server.

Then:
Load asset bundle manifest
Load assetBundles
Clean assetBundles (look at existing function)



if you want to loadfromfile nor in streamingAssets folder you can use the persistantApplicationPath instead.