在Webgl構建時出現決議錯誤，而同一專案在編輯器中作業正常

我在 Unity Webgl 上做一個專案，只有在我構建專案時才會出現錯誤（在編輯器中它作業正常）。基本上，我使用 Jsonblob 鏈接將引數分配給我制作的自定義結構。

錯誤說：Could not parse response {object}. Exception has been thrown by the target of an invocation.{object} 是我在 jsonblob 網站中使用的 json。

我正在使用的結構如下所示：

public struct GameSettings
{
    public String venueName { get; set; }
    public Monitor[] monitors { get; set; }
    public Flag[] flags { get; set; }
    public InformationMonitor[] informationMonitors { private get; set; }
    public Banner[] banners { get; set; }
    private const int MAX_MONITOR_LENGHT = 4;
}

雖然我獲取資料并分配資料的函式如下所示：

public GameSettings gameSettings;

public void Awake()
{
    isRecovered = false;
    GetData((response) => {
        isRecovered = true;
        gameSettings = response;
    });
}

public async void GetData(System.Action<GameSettings> callback)
{
    var url = jsonURL;

    var httpClient = new HttpClient(new JsonSerializationOptions());
    var result = await httpClient.Get<GameSettings>(url);
    callback(result);
}

正如錯誤所說，它似乎無法決議物件，盡管我真的不明白為什么會這樣，尤其是當專案在編輯器中正常作業時為什么會發生這種情況，我錯過了什么嗎？

uj5u.com熱心網友回復：

由于 WebGL 不支持多執行緒async， WebGL 也HttpClient完全不支持（另見此處）。

您應該使用UnityWebrequest.Getand 進行 JSON 反序列化，要么使用內置的，JsonUtility要么Newtonsoft Json.NET作為包提供并預裝在最新版本中。

例如像

// In order to use the built-in serializer your types need to be [Serializable]
[Serializable]
public struct GameSettings
{
    private const int MAX_MONITOR_LENGHT = 4;

    // Note that all nested types also need to be [Serializable]
    // Also at least the built-in JsonUtility only supports fields by default, no properties
    // so either make them all fields or use Newtonsoft
    // or enforce serialization using the undocumented [field: SerializeField] for each property
    public string venueName;
    public Monitor[] monitors;
    public Flag[] flags;
    public InformationMonitor[] informationMonitors;
    public Banner[] banners; 
}

public GameSettings gameSettings;
public string jsonURL;

// Start can be a Coroutine, if it returns IEnumerator it is automatically 
// statred as a Coroutine by Unity
private IEnumerator Start()
{
    isRecovered = false;
    
    // you can simply yield another IEnumerator 
    yield return GetData();
}

private IEnumerator GetData()
{
    using(var www = UnityWebRequest.Get(jsonURL))
    {
        // Request and wait for the result
        yield return www.SendWebRequest();

        if(www.result != UnityWebRequest.Result.Success)
        {
            Debug.LogError($"failed due to \"{www.error}\"", this);
            yield break;
        }

        // now this depends on how good your types are (de)serializable
        // either the built-in way
        gameSettings = JsonUtiltiy.FromJson<GameSettings>(www.downloadHandler.text);
        // or directly using Newtonsoft
        gameSettings = JsonConvert.DeserializeObject<GameSettings>(www.downloadHandler.text);


        isRecovered = true;
    }
}

標籤：json http unity3d 解析 网页浏览器

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