I searched how to wait coroutine in unity, and i found yield return StartCoroutine(IEnumerator). but when code start yield return, application quited. I want that application quit when every Coroutine finished. how can i fix this?

if can not wait Coroutine, how can i pause application quitting during data saved in web server.

private void OnApplicationQuit()
    {
        SaveGameData(GameManager.Instance.GetSaveData());
    }

public void SaveGameData(SaveData saveData)
    {
        string jsonString = JsonConvert.SerializeObject(saveData);

        UserController.Instance.SaveGameLogInfo02("name", jsonString, timer);
    }

public void SaveGameLogInfo02(string name, string rawdata/*jsonArray형식*/, long time)
    {
        if(saveGameLogInfoCoroutine02 == null)
        {
            saveGameLogInfoCoroutine02 = SaveGameLogInfoCoroutine02(name, rawdata, time);
            StartCoroutine(saveGameLogInfoCoroutine02);
        }
    }

    private IEnumerator SaveGameLogInfoCoroutine02(string name, string rawdata/*jsonArray형식*/, long time)
    {
        yield return StartCoroutine(apiController.SaveGameLogInfo02(saveUserData.GetAccessToken(), name, rawdata, time));

        SetJObject(apiController.RequestText);
        if (GetResult())
        {

            Debug.Log(string.Format("Success saved {0}'s log data", name));
        }
        else
        {
            Debug.Log("code : "   jo["code"]   ", message : "   jo["message"]);
        }

        saveGameLogInfoCoroutine02 = null;
        yield break;
    }

public IEnumerator SaveGameLogInfo02(string accessToken, string name, string rawdata, long time)
    {
        JObject json = new JObject();
        json.Add("name", name);
        json.Add("rawdata", rawdata);
        json.Add("time", time);

        yield return StartCoroutine(SendWebRequestWithTokenAndJson(accessToken, JsonConvert.SerializeObject(json), "/log/2/put"));
    }

private IEnumerator SendWebRequestWithTokenAndJson(string token, string json, string path)
    {
        UnityWebRequest request = new UnityWebRequest(serverURL   path, postMethod);
        byte[] jsonToSend = new UTF8Encoding().GetBytes(json);
        request.uploadHandler = new UploadHandlerRaw(jsonToSend);
        request.downloadHandler = new DownloadHandlerBuffer();
        request.SetRequestHeader("Authorization", "Bearer "   token);
        request.SetRequestHeader(requestName, requestValue);

        yield return request.SendWebRequest();

        RequestText = "";
        if (request.result != UnityWebRequest.Result.Success)
        {
            Debug.LogError("Error While Sending: "   request.error);
        }
        else
        {
            RequestText = request.downloadHandler.text;
        }

        yield break;
    }

CodePudding user response：

You can't really. When the application quits your scene and everything is going to be unloaded -> No Coroutine will execute anymore

What you can try is using a blocking/synchronous call just for that case and do e.g.

private void SendWebRequestWithTokenAndJsonSynchronous(string token, string json, string path)
{
    using(var request = new UnityWebRequest(serverURL   path, postMethod))
    {
        var jsonToSend = new UTF8Encoding().GetBytes(json);
        request.uploadHandler = new UploadHandlerRaw(jsonToSend);
        request.downloadHandler = new DownloadHandlerBuffer();
        request.SetRequestHeader("Authorization", "Bearer "   token);
        request.SetRequestHeader(requestName, requestValue);

        request.SendWebRequest();

        while(!request.isDone)
        {
            // Actually freeze until done
        }

        RequestText = "";
        if (request.result != UnityWebRequest.Result.Success)
        {
            Debug.LogError("Error While Sending: "   request.error);
        }

        Debug.Log("Upload successful!");
    }
}

Or alternatively block the application from quitting using Application.wantsToQuit but that's kind of tricky. (On iPhone this doesn't work! In the Editor this i also ignored!)

The idea here is:

• Every time you save store the time of the last save
• User wants to quit
• Check if the last save was "recently enough" so let's say e.g. within the last 30 seconds
• If yes, allow to quit
• If no upload a save now and then automatically quit

For this you would probably need to change your method signatures a bit and e.g. add a callback action you can pass into the routine and invoke it as soon as the upload finished.

Note that there is always still a chance that both doesn't work at all! Some devices (e.g. HoloLens) never really quits the app clean (except you explicitly built a button for it). There all applications are rather hibernated and the User can literally kill them kind of like via the TaskManager.

CodePudding user response：

Handle it with OnApplicationQuit()

public IEnumerator SaveGameLogInfo02(string accessToken, string name, string rawdata, long time)

    {
        JObject json = new JObject();
        json.Add("name", name);
        json.Add("rawdata", rawdata);
        json.Add("time", time);

        yield return StartCoroutine(SendWebRequestWithTokenAndJson(accessToken, JsonConvert.SerializeObject(json), "/log/2/put"));

    allowQuitting = true;
    Application.Quit();

    }

void OnApplicationQuit()
{
    // Delay quit
    {
        SaveGameData(GameManager.Instance.GetSaveData());
    }

    // Check permission to cancel if not done
    if (!allowQuitting)
    {
        Application.CancelQuit();
    }
}