unityzgy/Assets/Scripts/PublicTool/FileHelper.cs

using System.Threading.Tasks;
using UnityEngine;
using UnityEngine.Networking;
using XFramework;

public static class FileHelper
{
    public static async Task<string> GetAllText(string path)
    {
        var task = LoadAsyncSprite(path);
        Task<string> t = await Task.WhenAny(task);
        return t.Result;
    }

    static async Task<string> LoadAsyncSprite(string path)
    {
        var uri = new System.Uri(path);
        UnityWebRequest www = UnityWebRequest.Get(uri);
        await www.SendWebRequest(); //报错则代表未添加 扩展方法GetAwaiter
        if (www.isNetworkError || www.isHttpError)
        {
            Debug.Log(www.error);
            return null;
        }
        else
        {
            return www.downloadHandler.text;
        }
    }



}