Why can I not load assets via Resource.LoadAll() at runtime when running on IOS but the assets load fine on OS X?

Question

After struggling to load assets from resources (I still haven't figured out why this wouldn't work actually) I was able to finally load assets during runtime after packing them into AssetBundles using the following code:

var myBundle = AssetBundle.LoadFromFile("Assets/AssetBundles/soundanchors");
  if (myBundle == null)
  {
     Debug.Log("Failed to load assets from bundle at Assets/AssetBundles");
  }
  else
  {
     Debug.Log("Successfully loaded sound anchors from Assets/AssetBundles");
     soundAnchors = myBundle.LoadAllAssets();
     AddAnchorsToGrid();
  }

The code works fine when I build and run the project on OS X. However, once I build the project and run it on an IOS device I am no longer seeing the asset bundles load.

I'm assuming this is because the path to where the bundles are saved is different on IOS but I'm having trouble locating where I should be looking for them.

As you can see from the code, the location of the bundles in my Assets folder is here: "Assets/AssetBundles/soundanchors"

How does Unity handle the asset paths on IOS? Is there some constant in the Unity API that holds the default IOS path prefix?

Answer 1

As far as I remember for IOS, you have to create folder named StreamingAssets in Assets like "Assets/StreamingAssets" and put your bundles inside of it. You can load your assetsbunles like this:

void Start()
{
    var myLoadedAssetBundle = AssetBundle.LoadFromFile(Path.Combine(Application.streamingAssetsPath, "myassetBundle"));
    if (myLoadedAssetBundle == null)
    {
        Debug.Log("Failed to load AssetBundle!");
        return;
    }

    var prefab = myLoadedAssetBundle.LoadAsset<GameObject>("MyObject");
    Instantiate(prefab);

    myLoadedAssetBundle.Unload(false);
}