Unity www“中止”错误

Question

我有以下错误

当我尝试下载带有统一 www 类的 mp4 文件时，它失败了，在 www.error 中只有“中止”错误消息

这是一个奇怪的错误，它只出现在某些设备上，我已经在 Galaxy Note 5 上尝试过并且效果很好，当有人在 Galaxy s7 上尝试过时，他得到了这个错误

任何人都知道什么是hapening？

感谢你们的帮助。

下载视频的代码

private IEnumerator DownloadVideo()
{
    showDownloadProgress = true;
    downloadProgress.gameObject.SetActive(true);

    videoURL = MainPlayerCTRL.mediaURL;
    Uri uri = new Uri(videoURL);
    string filename = System.IO.Path.GetFileName(uri.LocalPath);
    string localFilePath = Application.persistentDataPath + "/"+ filename;
    bool tryVideoDownload = true;

    if (!File.Exists(localFilePath))
    {
        while (tryVideoDownload)
        {
            downloadProgressText.text = "Downloading";
            showDownloadProgress = true;
            downloadProgress.gameObject.SetActive(true);

            www = new WWW(videoURL);
            yield return www;
            if (String.IsNullOrEmpty(www.error))
            {
                byte[] bytes = www.bytes;
                FileStream fs = new FileStream(localFilePath, FileMode.Create);
                fs.Write(bytes, 0, bytes.Length);
                downloadProgressText.text = "Download done!";
                yield return new WaitForSeconds(2);
                tryVideoDownload = false;
            }//Video downloaded
            else
            {
                showDownloadProgress = false;
                downloadProgress.gameObject.SetActive(true);
                downloadProgressText.text = "Download ERROR \n ";
                downloadProgressText.text += www.error;
                yield return new WaitForSeconds(2);
                downloadProgressText.text = "Attempting to download again";
                yield return new WaitForSeconds(2);
                tryVideoDownload = true;
            }
        }

        yield return new WaitForEndOfFrame();
    }

}

Answer 1

我怀疑的第一件事是使用FileStream 复制大文件时通常会发生内存不足，但您提到您从www.error 收到“中止”错误。罪魁祸首可能是WWW，首先要做的是使用UnityWebRequest。我用UnityWebRequest 替换了你函数中的WWW。

您需要在顶部包含using UnityEngine.Networking; 才能使用它。另一件事是 yield return new WaitForEndOfFrame(); 应该在 while 循环内而不是在它之外，使用 yield return null; 更好。

private IEnumerator DownloadVideo()
{
    showDownloadProgress = true;
    downloadProgress.gameObject.SetActive(true);

    videoURL = MainPlayerCTRL.mediaURL;
    Uri uri = new Uri(videoURL);
    string filename = System.IO.Path.GetFileName(uri.LocalPath);
    string localFilePath = Application.persistentDataPath + "/" + filename;
    bool tryVideoDownload = true;

    if (!File.Exists(localFilePath))
    {
        while (tryVideoDownload)
        {
            downloadProgressText.text = "Downloading";
            showDownloadProgress = true;
            downloadProgress.gameObject.SetActive(true);

            UnityWebRequest www = UnityWebRequest.Get(videoURL);
            yield return www.Send();

            if (String.IsNullOrEmpty(www.error))
            {
                byte[] bytes = www.downloadHandler.data;
                FileStream fs = new FileStream(localFilePath, FileMode.Create);
                fs.Write(bytes, 0, bytes.Length);
                downloadProgressText.text = "Download done!";
                yield return new WaitForSeconds(2);
                tryVideoDownload = false;
            }//Video downloaded
            else
            {
                showDownloadProgress = false;
                downloadProgress.gameObject.SetActive(true);
                downloadProgressText.text = "Download ERROR \n ";
                downloadProgressText.text += www.error;
                yield return new WaitForSeconds(2);
                downloadProgressText.text = "Attempting to download again";
                yield return new WaitForSeconds(2);
                tryVideoDownload = true;
            }

            yield return null;
        }
    }
}