遍历多个 UnityWebRequests

Question

我一直在努力让一些 API 沟通工作。我正在使用 UnityWebRequests，因为我想构建为 WebGL（我尝试了 System.Net.WebRequest，它在游戏模式下工作，但与 WebGL 不兼容）。这可能只是协程的问题，但我会以半伪的方式向您展示我目前所拥有的以及我的问题是什么：

using UnityEngine;
using UnityEngine.Networking;
using System.Collections;
using System.Collections.Generic;

public class scking : MonoBehaviour
{

    string tempText;
    string getUri = "https://api.opensensors.com/getProjectMessages";
    string jwtToken = "someToken";

    private void Start()
    {
        pullAllData();
    }

    IEnumerator GetDataRequest(string currentDateString, string nextDateString, string sensorID)
    {
        string requestParam = "myparameters: " + nextDateString + sensorID; // simplified dummy parameters

        using (UnityWebRequest webRequest = UnityWebRequest.Get(requestParam))
        {
            webRequest.SetRequestHeader("Authorization", "Bearer " + jwtToken);
            webRequest.SetRequestHeader("Content-Type", "application/json");

            yield return webRequest.SendWebRequest();

            // from unity api example
            string[] pages = getUri.Split('/');
            int page = pages.Length - 1;

            if (webRequest.isNetworkError)
            {
                Debug.Log(pages[page] + ": Error: " + webRequest.error);
            }
            else
            {
                Debug.Log(pages[page] + ":\nReceived: " + webRequest.downloadHandler.text);
            }

            // getting the data i pulled out of the coroutine for further manipulation
            this.tempText = webRequest.downloadHandler.text;

            // show whats been pulled
            print(this.tempText);
        }
    }

    void pullAllData()
    {
        int allDaysCount = 10;
        List<int> sensorIds; // initialized with some ids

        for(int i = 0; i < allDaysCount - 1; i++)
        {
            for(int j = 0; j < sensorIds.Count; j++)
            {
                StartCoroutine(GetDataRequest(i, i + 1, sensorIds[j]));

                // show whats been pulled
                print(this.tempText);

                // parse json string this.tempText etc.
            }
        }

    }
}

输出为（按时间排序）

来自 pullAddData:null

中的打印

然后在协程中打印下一个：jsonItem

基本上，Coroutine 花费的时间太长，而且对于我的循环来说已经太晚了，无法继续，而且因为我得到一个 null，所以我当然无法解析或操作我的数据。或者我的整个工作都有缺陷，那么，如何正确地做到这一点？

非常感谢您对此提供的任何帮助。善良的菲利普

Answer 1

如果你想等 parallel 查看我对 Wait for all requests to continue

的回答

如果你宁愿继续等待它们一个接一个你可以简单地将它们包装成一个更大的协程：

void pullAllData()
{
    int allDaysCount = 10;
    List<int> sensorIds; // initialized with some ids

    // start the "parent" Coroutine
    StartCoroutine(GetAllData(allDaysCount, sensorIds));
}

IEnumerator GetAllData(int allDaysCount, List<int> sensorIds)
{
    for(int i = 0; i < allDaysCount - 1; i++)
    {
        for(int j = 0; j < sensorIds.Count; j++)
        {
            // Simply run and wait for this IEnumerator
            // in order to execute them one at a time
            yield return GetDataRequest(i, i + 1, sensorIds[j]);

            // show whats been pulled
            print(this.tempText);

            // parse json string this.tempText etc.
        }
    }

    // Maybe do something when all requests are finished and handled
}

IEnumerator GetDataRequest(string currentDateString, string nextDateString, string sensorID)
{
    string requestParam = "myparameters: " + nextDateString + sensorID; // simplified dummy parameters

    using (UnityWebRequest webRequest = UnityWebRequest.Get(requestParam))
    {
        webRequest.SetRequestHeader("Authorization", "Bearer " + jwtToken);
        webRequest.SetRequestHeader("Content-Type", "application/json");

        yield return webRequest.SendWebRequest();

        // from unity api example
        string[] pages = getUri.Split('/');
        int page = pages.Length - 1;

        if (webRequest.isNetworkError)
        {
            Debug.Log(pages[page] + ": Error: " + webRequest.error);
        }
        else
        {
            Debug.Log(pages[page] + ":\nReceived: " + webRequest.downloadHandler.text);
        }

        // getting the data i pulled out of the coroutine for further manipulation
        this.tempText = webRequest.downloadHandler.text;

        // show whats been pulled
        print(this.tempText);
    }
}

遍历多个 UnityWebRequests

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