努力从资产加载中获得正确的下载进度

Question

我正在尝试使用系统下载预制件。地址位于远程服务器上，我的可寻址系统设置为从该远程服务器提取。下面的代码从服务器加载该资产，并报告其下载进度。然而，这似乎不起作用。UpdateProgressBar方法只被调用一次，然后永远不会被调用。据我所知，只要有一些事情要做，就应该运行Coroutines，所以我假设使用while循环会导致coroutine继续调用UpdateProgressBar方法。

我在互联网上环顾四周，似乎人们在从AsyncOperationHandles获得下载进度时遇到了类似的问题，但大多数问题都是几年前出现的，所以我认为现在已经解决了。

总之，我有什么遗漏/做错了什么吗？我对Unity非常陌生，所以任何建议或建设性的批评都将是最受欢迎的。

    public IEnumerator DownloadAsset(string assetKey)
    {
        loadingScreen.SetActive(true);
        AsyncOperationHandle<GameObject> handle = Addressables.LoadAssetAsync<GameObject>(assetKey);
        handle.Completed += (AyncOperationHandle) =>
        {
            DownloadComplete(handle);
            loadingScreen.SetActive(false);
        };

        yield return handle;
        DownloadStatus downloadStatus = handle.GetDownloadStatus();
        while (!handle.IsDone && downloadStatus.Percent < 1)
        {
            UpdateProgressBar(downloadStatus.Percent);
            yield return null;
        }
    }

    private void DownloadComplete(AsyncOperationHandle goHandle)
    {
        Debug.Log("Asset Downloaded!");
        GameObject obj = goHandle.Result as GameObject;
        Instantiate(obj);

        Addressables.Release(goHandle);
    }

    public void UpdateProgressBar(float progress)
    {
        progressBar.normalizedValue = progress;
        Debug.Log(string.Format("Downloaded {0:P1}", progress));

        if (progress >= 1.0f) loadingScreen.SetActive(false);
    }

单击按钮时，将从另一个脚本调用DowloadAsset函数：

    [SerializeField] private string assetKey;

    void Start()
    {
        Button button = GetComponent<Button>();
        button.onClick.AddListener(() => StartCoroutine(gameManager.DownloadAsset(assetKey)));
    }

Answer 1

尝尝这个

public IEnumerator DownloadAsset(string assetKey)
{
    loadingScreen.SetActive(true);
    var downloadAsync = Addressables.DownloadDependenciesAsync(assetKey);
    downloadAsync.Completed += (AyncOperationHandle) =>
    {
        DownloadComplete(handle);
        loadingScreen.SetActive(false);
    };

    yield return downloadAsync;
    
    while (!downloadAsync.IsDone && downloadAsync.IsValid())
    { 
        DownloadStatus downloadStatus = downloadAsync.GetDownloadStatus();

        UpdateProgressBar(downloadStatus.Percent);

        yield return null;
    }
}

Answer 2

private IEnumerator ShowSizeText(string labelName)
    {

        AsyncOperationHandle<long> asynOperCheck = Addressables.GetDownloadSizeAsync(labelName);
        yield return asynOperCheck;

        if (asynOperCheck.Status == AsyncOperationStatus.Succeeded)
        {
            long DownloadSize = asynOperCheck.Result;
            long size = (long)Math.Round(DownloadSize / 1000000f, 2);
            long totalBundleSize = (long)size;
        }
        else if (asynOperCheck.Status == AsyncOperationStatus.Failed)
        {
            Debug.Log("Network Error");
        }
    }