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using System.Collections;using System.Collections.Generic;using UnityEngine;using System.IO;using UnityEngine.UI;using System;using qynewmj.Tools;using qynewmj.Helper;public class GetImage{   // 掉DownLoadUri(uri) 方法···接HttpDownLoadCompleted事件 HttpDownLoadCompleted(arg1, arg2);     //第一个给你的参数是uri,第2个byte[] 你可以先判断uri是不是等于你刚才传进去的···    public static Sprite DownLoadImage(string url)    {        string md5 = MD5Tool.MD5HashString(url);        string fileName = Application.persistentDataPath + "/" + md5 + ".jpg";        bool exist = File.Exists(fileName);              // 如果存在        if (exist)        {            return LoadAlreadlySaveFile(fileName);        }        else        {            // 开启下载，会触发bytes回调(uri,byte[])            ApiHelper.Instance.DownLoadUri(url);            return  null;        }    }    public  static Sprite SaveImage(string url,byte[] bytes)    {        string md5 = MD5Tool.MD5HashString(url);        string fileName = Application.persistentDataPath + "/" + md5 + ".jpg";        FileStream fs = new FileStream(fileName, FileMode.OpenOrCreate);		fs.Write(bytes, 0, bytes.Length);		fs.Close();        return LoadAlreadlySaveFile(fileName);    }    private static Sprite LoadAlreadlySaveFile(string fileName)    {        FileStream fs = new FileStream(fileName, FileMode.OpenOrCreate);		byte[] imgByte = new byte[fs.Length];		fs.Read(imgByte, 0, imgByte.Length);		Texture2D tex = new Texture2D(80,80);		try		{			tex.LoadImage(imgByte);		}		catch (Exception ex)		{		}		Sprite sprite = Sprite.Create(tex, new Rect(0, 0, tex.width, tex.height), new Vector2(0.5f, 0.5f));		fs.Close();        return sprite;	}}

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