Question

我正在尝试从我的服务器获取一些信息，现在我想在条形图上显示进度（如下载栏），但下载进度一直在继续。

这是我恢复帖子的功能

public IEnumerator RecoveryPosts(string username, string first_last_post, int id_post, Action<List<RecoveryPostsStruct>> Oncomplete)
{
    string postsJson = "";
    WWWForm form = new WWWForm();
    form.AddField("RecoveryPosts",
        "{\"username\": \"" + username + "\"," +
        "\"first_last_post\": \"" + first_last_post + "\"," +
        "\"id_post\": \"" + id_post + "\"}");

    UnityWebRequest www = UnityWebRequest.Post(URI_USER, form);
    Debug.Log("Execute".Tint(Color.yellow).Bold());
    FindObjectOfType<PostController>().StartCoroutine(ShowDownloadProgress(www));
    yield return www.Send();
    if (!www.isNetworkError)
    {
        Debug.Log("Success!\n<color=#00e640><b>Recupera Posts</b></color>\n");
        Debug.Log("Response:" + www.downloadHandler.text + "\n");
        postsJson = www.downloadHandler.text;
        if (postsJson != Util.ROUNDSTARS_ERROR)
        {
            List<RecoveryPostsStruct> listPostsStruct = new List<RecoveryPostsStruct>();
            List<string> list = new List<string>();
            RecoveryPostsJson[] posts = JsonHelper.FromJson<RecoveryPostsJson>(postsJson);
            foreach (RecoveryPostsJson item in posts)
            {
                listPostsStruct.Add(new RecoveryPostsStruct(item.id_post, item.profilePicture, item.username, item.post, item.info_likes, item.qtd_comments, item.postPicture, item.date_post));
            }
            Oncomplete(listPostsStruct);
        }
    }

，这是为了显示进度

public IEnumerator ShowDownloadProgress(UnityWebRequest www) {
    while (!www.isDone) {
        if(LoadingScreen.instance != null)
            LoadingScreen.Fill(www.downloadProgress);
        Debug.Log(string.Format("Downloaded {0:P1}", www.downloadProgress));
        yield return new WaitForSeconds(.1f);
    }
    Debug.Log("Done");
}

这是我从控制台获得的

修改

这是新的ShowDownloadProgress：

public IEnumerator ShowDownloadProgress(UnityWebRequest www) {
    while (!www.isDone) {
        if(LoadingScreen.instance != null)
            LoadingScreen.Fill(www.downloadProgress);
        Debug.Log(string.Format("Downloaded {0:P1}", www.downloadProgress));
        yield return null;
    }
    Debug.Log("Done");
}

这就是新的RecoveryPosts：

 public IEnumerator RecoveryPosts(string username, string first_last_post, int id_post, Action<List<RecoveryPostsStruct>> Oncomplete)
{
    string postsJson = "";
    WWWForm form = new WWWForm();
    form.AddField("RecoveryPosts",
        "{\"username\": \"" + username + "\"," +
        "\"first_last_post\": \"" + first_last_post + "\"," +
        "\"id_post\": \"" + id_post + "\"}");

    UnityWebRequest www = UnityWebRequest.Post(URI_USER, form);
    Debug.Log("Execute".Tint(Color.yellow).Bold());
    //Make request. Don't yield
    www.SendWebRequest(); 
    //Yield/wait in the ShowDownloadProgress until ShowDownloadProgress returns 
    yield return FindObjectOfType<PostController>().StartCoroutine(ShowDownloadProgress(www));
    if (!www.isNetworkError)
    {
        Debug.Log("Success!\n<color=#00e640><b>Recupera Posts</b></color>\n");
        Debug.Log("Response:" + www.downloadHandler.text + "\n");
        postsJson = www.downloadHandler.text;
        if (postsJson != Util.ROUNDSTARS_ERROR)
        {
            List<RecoveryPostsStruct> listPostsStruct = new List<RecoveryPostsStruct>();
            List<string> list = new List<string>();
            RecoveryPostsJson[] posts = JsonHelper.FromJson<RecoveryPostsJson>(postsJson);
            foreach (RecoveryPostsJson item in posts)
            {
                listPostsStruct.Add(new RecoveryPostsStruct(item.id_post, item.profilePicture, item.username, item.post, item.info_likes, item.qtd_comments, item.postPicture, item.date_post));
            }
            Oncomplete(listPostsStruct);
        }
    }
    else
    {
        Debug.Log("Error: " + www.error);
    }
}

Answer 1

您应该在调用www.isDone之后才使用www.Send()。这可能是为什么它从100变为0.此外，当您使用www.Send()时，不要产生www.isDone。如果您不关心或需要该请求的进度，则仅收取www.Send()。最后，等待或屈服ShowDownloadProgress函数，直到它返回，然后才能访问下载的数据或执行if (!www.isNetworkError)。无需等待ShowDownloadProgress功能，您将尝试在下载尚未完成时访问下载的数据。

在RecoveryPosts功能中，更改

UnityWebRequest www = UnityWebRequest.Post(URI_USER, form);
Debug.Log("Execute".Tint(Color.yellow).Bold());
FindObjectOfType<PostController>().StartCoroutine(ShowDownloadProgress(www));
yield return www.Send();

到

UnityWebRequest www = UnityWebRequest.Post(URI_USER, form);
Debug.Log("Execute".Tint(Color.yellow).Bold());
//Make request. Don't yield
www.Send(); 
//Yield/wait in the ShowDownloadProgress until ShowDownloadProgress returns 
yield return FindObjectOfType<PostController>().StartCoroutine(ShowDownloadProgress(www));

在ShowDownloadProgress功能中，将yield return new WaitForSeconds(.1f);更改为yield return null;，以便每帧都取得进度，而不是每0.1秒。

Answer 2

我认为是服务器问题。首先我使用谷歌驱动器直接下载，它运行得很糟糕，和你一样的问题。然后，我尝试使用 github raw gists，它运行正常，再也没有回来。

my screenshot

Unity WebRequest.downloadProgress不断回来

2 个答案: