How use asset bundle for a image folder ?

Hi everyone,

I want create an assetbundle from a image folder (only images inside: for change textures in my scenes). I'm using this code for export the asset (in JavaScript):

 @MenuItem ("Assets/Build AssetBundle From Selection - Track dependencies")
 static function ExportBundle(){
 
         var str : String = EditorUtility.SaveFilePanel("Save Bundle...", Application.dataPath, Selection.activeObject.name, "assetbundle");
         if (str.Length != 0){
              BuildPipeline.BuildAssetBundle(Selection.activeObject, Selection.objects, str, BuildAssetBundleOptions.CompleteAssets, BuildTarget.iPhone);
         }
 }

and then use this on my image folder to got "myBundle.assetbundle" file at "Assets/Assetbundles/" path.

I use this C# script for import the asset bundle:

  using UnityEngine;
  using System.Collections;
  using System;
     
     public class ImportAssetBundle : MonoBehaviour {
         private WWW www;
         public string AssetName = "myBundle";
         
         void Start () {
         StartCoroutine( DownloadAndCache());
         }
         IEnumerator DownloadAndCache() 
         {
             string BundleURL = "file://" + Application.dataPath +  "/Assets" + "/Assetbundles" + "/" + AssetName + ".assetbundle";
            // Download the file from the URL. It will not be saved in the Cache
            using (WWW www = new WWW(BundleURL)) {
                yield return www;
                if (www.error != null)
                    throw new Exception("WWW download had an error:" + www.error);
                AssetBundle bundle = www.assetBundle;    
                if (AssetName == "")
                 Instantiate(bundle.mainAsset);
                else
                    bundle.LoadAll();
                        // Unload the AssetBundles compressed contents to conserve memory
                 bundle.Unload(false);
     
            } // memory is freed from the web stream (www.Dispose() gets called implicitly)
         }
     }

And now, i would like use these images for change all textures in another C# script, but i don't know how call these images. I want do something like:

 www = new WWW ("file://" + Application.dataPath +  "/Assets" + "/Assetbundles" + "myImage.jpg");
 myMaterial.mainTexture = www.texture;

for update new textures, but this path is wrong, "myImage.jpg" is inside my assetbundle. Note: I'm building on iOS device.

Any though? Thanks.