Unity中使用UnityWebRequest加载AssetBundle

1.使用UnityWebRequest需要引用using UnityEngine.Networking.
2.UnityWebRequest中有几个方法，UnityWebRequest.GetAssetBundle（URL）获取assetBundle资源，有一个返回资源的函数SendWebRequest，用来下载资源，DownloadHandlerAssetBundle.GetContent()未获取assetBundle资源包，接着就是LoadAsset<>()加载，实例化。
3.代码如下
void Start () {
StartCoroutine(Load());
}

private IEnumerator Load()
{
    string url = "";//此为AssetBundle资源路径，可为本地，也可以是服务端
   UnityWebRequest request=  UnityWebRequest.GetAssetBundle(url);
    yield return request.SendWebRequest ();
    // AssetBundle ab = DownloadHandlerAssetBundle.GetContent (request );

    AssetBundle ab = (request.downloadHandler as DownloadHandlerAssetBundle).assetBundle;
    GameObject ao = ab.LoadAsset<GameObject>("Man1");
    Instantiate(ao);
}

4.多看看UnityApi。