c# - assetBundle 返回 null

Question

我正在使用 UnityWebRequest 从服务器下载 assetBundle，它在 unity 编辑器中运行良好，但在 andriod 中它给出空值，有人可以帮忙吗

public IEnumerator DownloadAsset(string url, string assetName)
{
    using (UnityWebRequest www = UnityWebRequestAssetBundle.GetAssetBundle(url))
    {
        yield return www.SendWebRequest();
        AssetBundle bundle = DownloadHandlerAssetBundle.GetContent(www);
        if (bundle != null)
        {
            AGUIMisc.ShowToast("Not Null");
            GameObject temp = bundle.LoadAsset(assetName) as GameObject;
            var newobjj = Instantiate(temp);
            newobjj.transform.parent = maleparent.transform;
        }
        else
        {
            AGUIMisc.ShowToast("Null");
        }
    }
}

Answer 1

目标平台 Android:

AssetBundle 需要在稍后使用的目标平台中构建。由于您想在 Android 中使用 AssetBundle，因此当您构建 AssetBundle 时，目标平台 也应该是Android。

另请检查:

你应该设置UnityWebRequest.downloadHandler打电话前先UnityWebRequest.SendWebRequest()使用 DownloadHandlerAssetBundle .

    public System.Collections.IEnumerator DownloadAsset(string url, string assetName)
    {
        using (var uwr = new UnityEngine.Networking.UnityWebRequest(url, UnityEngine.Networking.UnityWebRequest.kHttpVerbGET))
        {
            uwr.downloadHandler = new UnityEngine.Networking.DownloadHandlerAssetBundle(url, 0);
            yield return uwr.SendWebRequest();
            AssetBundle bundle = UnityEngine.Networking.DownloadHandlerAssetBundle.GetContent(uwr);
            if (bundle != null)
            {
                AGUIMisc.ShowToast("Not Null");
                GameObject temp = bundle.LoadAsset<GameObject>(assetName);
                var newobj = GameObject.Instantiate(temp);
                newobj.transform.parent = maleparent.transform;
            }
            else
            {
                AGUIMisc.ShowToast("Null");
            }
        }
    }