Unity IO 加载图片

using System.Collections;
using System.Collections.Generic;
using System.IO;
using UnityEngine;
using UnityEngine.UI;

public class LoaderPic:MonoBehaviour {

    /// <summary>
    /// 以IO方式进行加载
    /// </summary>
    public static void LoadByIo(string url,GameObject ImageOBJ) {//创建文件读取流
        FileStream fileStream = new FileStream(url,FileMode.Open,FileAccess.Read);
        //创建文件长度缓冲区
        byte[] bytes = new byte[fileStream.Length];
        //读取文件
        fileStream.Read(bytes,0,(int)fileStream.Length);

        //释放文件读取流
        fileStream.Close();
        //释放本机屏幕资源
        fileStream.Dispose();
        fileStream = null;

        //创建Texture
        int width = 300;
        int height = 372;
        Texture2D texture = new Texture2D(width,height);
        texture.LoadImage(bytes);

        //创建Sprite
        Sprite sprite = Sprite.Create(texture,new Rect(0,0,texture.width,texture.height),new Vector2(0.5f,0.5f));
        ImageOBJ.GetComponent<Image>().sprite = sprite;

    }
}