Unity on iOS is caching my asset bundle without me asking it to!

Hello,

I've run into a perplexing problem where my Unity app on iOS appears to be caching an asset bundle, but I DON'T want it to be cached!

This is how I'm downloading the asset bundle:

Code (csharp):

1.  
2.         WWW www = new WWW("http://urlofassetbundle");
3.         yield return www;
4.         AssetBundle bundle = www.assetBundle;
5.  

Note that I'm *not* calling WWW.LoadFromCacheOrDownload here, nor is it called anywhere else in my code.

Once an asset bundle is downloaded from that URL, Unity appears to cache it on my iPad, such that any future updates to the asset bundle won't get downloaded. In order to "un-cache" the asset bundle, I have to delete the app from my iPad and reinstall it -- killing the running app process is not sufficient.

What's going on here? How can I prevent Unity from caching my asset bundle? I'm using Unity 4.2.2f1.

Thanks for your help!

 

Anyone else having this problem? Does anyone have any idea what's going on?

 

Just for kicks do this:

Code (csharp):

1.  
2. WWW www = new WWW(string.Format("http://urlofassetbundle?nc={0}",Guid.NewGuid().ToString()));
3. yield return www;
4. AssetBundle bundle = www.assetBundle;
5.  

Adding the ?nc=(random guid here) should cause the device to treat it as a separate call and not cache it.

 

Good idea, I'll try that. Thanks!