无法加载，因为已经加载了另一个具有相同文件的 AssetBundle

Question

我想在AR相机中播放视频。我总共有 10 个视频和一个视频播放器。我正在从服务器下载视频播放器作为名称为 videoplayer.unit3d 的资产包并存储到 SD 卡中。当我扫描 imageTarget 时，我正在使用 AssetBundle.LoadFromFile() 函数读取视频资产包文件，这是第一次它工作正常。

如果我扫描第二个 imageTarget，它会显示以下错误

"Can't be loaded because another AssetBundle with the same files is already loaded"

我已经尝试了 bundle.Unload(true); 和 Caching.cleanchache() 但它不起作用并抛出相同的错误。也试过bundle.Unload(false);

 private void loadObject(string resourcePath, string objectName, TrackableBehaviour trackableBehaviuor, string videoUrl)
    {

        Debug.Log("Resource path " + resourcePath + " objectName " + objectName);

        Debug.Log("Video Url from sd card   " + videoUrl);

        FileInfo fileInfo = new FileInfo(resourcePath);

        if (!fileInfo.Exists)
            return;


        Debug.Log("File is present");
        AssetBundle bundle = AssetBundle.LoadFromFile(resourcePath, 0, 0);//www.assetBundle;


        Debug.Log("Bundle data is  " + bundle);
        if (bundle == null)
        {
            AndroidJavaObject jObject = new AndroidJavaObject("com.ezvidya.buzzle.activity.UnityActivity");
            jObject.Call("showErrorDialog");
            return;
        }
        else
        {
            AndroidJavaObject jo = new AndroidJavaObject("com.ezvidya.buzzle.activity.UnityActivity");
            jo.Call("closeScanDialog");
        }

        //Load an asset from the loaded bundle
        AssetBundleRequest bundleRequest = bundle.LoadAssetAsync(objectName, typeof(GameObject));

        //bundle.Unload(false);
        Caching.CleanCache();

        //get object
        GameObject cubeFromSDCard = bundleRequest.asset as GameObject;


        if (cubeFromSDCard != null)
        {
            // instantiate augmentation object and parent to trackable
            GameObject augmentation = (GameObject)GameObject.Instantiate(cubeFromSDCard);

            augmentation.transform.parent = trackableBehaviuor.gameObject.transform;

            augmentation.transform.localPosition = cubeFromSDCard.transform.localPosition;//new Vector3(0f, 0f, 0f);
            augmentation.transform.localRotation = cubeFromSDCard.transform.localRotation;//Quaternion.identity;
            augmentation.transform.localEulerAngles = cubeFromSDCard.transform.localEulerAngles;
            augmentation.transform.localScale = cubeFromSDCard.transform.localScale;// new Vector3(22f, 22f, 22f);

            Debug.Log("$$$$$$$$$$$$$$$$  Local Position from asset object " + cubeFromSDCard.transform.localPosition);
            Debug.Log("$$$$$$$$$$$$$$$$  Local Rotation from asset object " + cubeFromSDCard.transform.localEulerAngles);
            Debug.Log("$$$$$$$$$$$$$$$$  Local Scale from asset object " + cubeFromSDCard.transform.localScale);


            Debug.Log("$$$$$$$$$$$$$$$$  Position from asset object " + cubeFromSDCard.transform.position);
            Debug.Log("$$$$$$$$$$$$$$$$  Rotation from asset object " + cubeFromSDCard.transform.eulerAngles);
            Debug.Log("$$$$$$$$$$$$$$$$  Scale from asset object " + cubeFromSDCard.transform.lossyScale);


            // Caching.CleanCache();
            if (videoUrl != null && videoUrl.Length > 0)
            {
                VideoPlaybackBehaviour video = augmentation.GetComponent<VideoPlaybackBehaviour>();

                video.m_autoPlay = true;
                Debug.Log("Autoplay is " + video.AutoPlay);
                video.m_path = videoUrl;

                // Pause other videos before playing this one
                // Play this video on texture where it left off

                //OnTrackingFound(false);

                if (video != null && video.AutoPlay)
                {
                    VideoPlayerHelper.MediaState state = video.VideoPlayer.GetStatus();
                    if (state == VideoPlayerHelper.MediaState.PAUSED ||
                        state == VideoPlayerHelper.MediaState.READY ||
                        state == VideoPlayerHelper.MediaState.STOPPED)
                    {
                        // Pause other videos before playing this one
                        PauseOtherVideos(video);

                        // Play this video on texture where it left off
                        video.VideoPlayer.Play(false, 0);
                    }
                    else if (state == VideoPlayerHelper.MediaState.REACHED_END)
                    {
                        // Pause other videos before playing this one
                        PauseOtherVideos(video);

                        // Play this video from the beginning
                        video.VideoPlayer.Play(false, 0);
                    }

                }                

            }

            augmentation.gameObject.SetActive(true);
        }

        //bundle.Unload(false);
    }

Answer 1

我找到了答案，在 Instantiate 游戏对象调用 bundle.Unload(false); 之后它解决了我的问题。

Answer 2

我已经使用添加以下两行解决了这个问题，

private AssetBundle myLoadedAssetBundle;
string bundleUrl="";
IEnumerator LoadAssetBundle ()
{
    if (myLoadedAssetBundle != null) {
        myLoadedAssetBundle.Unload(false); //scene is unload from here
    }

    while (!Caching.ready)
        yield return null;

    WWW www = WWW.LoadFromCacheOrDownload(bundleUrl, 1);
    yield return www;

    if (!string.IsNullOrEmpty(www.error))
    {
        Debug.Log(www.error);
        yield return null;
    }
    myLoadedAssetBundle = www.assetBundle;
}

无法加载，因为已经加载了另一个具有相同文件的 AssetBundle

Can't be loaded because another AssetBundle with the same files is already loaded

c#

unity3d

assetbundle