AssetBoundle載入非預設資源

1.定義一個協程LoadNonObjFromAB
 IEnumerator LoadNonObjFromAB(string ABURL, GameObject go, string assetName)

參數含義：ABURL：要下載的AB包地址　　go:用於測試，顯示載入貼圖　　assetName:要載入的資源名稱

IEnumerator LoadNonObjFromAB(string ABURL, GameObject go, string assetName)
        {
            //參數檢查
            if(string.IsNullOrEmpty(ABURL) || go == null)
            {
                Debug.LogError("參數錯誤！");
            }
            using (WWW www = new WWW(ABURL))
            {
                yield return www;
                AssetBundle ab = www.assetBundle;　　　　//獲取AB包
                if(ab != null)
                {
                    if(assetName == "")
                    {
                        go.GetComponent<Renderer>().material.mainTexture = ab.mainAsset as Texture;
                    }
                    else
                    {

                        go.GetComponent<Renderer>().material.mainTexture = (Texture)ab.LoadAsset(assetName);　　//替換貼圖為下載的貼圖
                        print(assetName);

                    }
                    //卸載AB包
                    ab.Unload(false);
                }
                else
                {
                    Debug.LogError("下載錯誤："+www.error);
                }
            }
}

2.調用協程

 private void Start()
        {
            StartCoroutine(LoadNonObjFromAB(URL1, testGo, assetName1));
        }

（在調用之前要對參數初始化）