u3d加载外部文件资源的俩种方法

 
//IO方式
void IOloadImage()
    {
        FileStream fileStream = new FileStream("E:\\桌面文件\\桌面\\test\\1.jpg", FileMode.Open, FileAccess.Read);
        fileStream.Seek(0, SeekOrigin.Begin);
        byte[] bytes = new byte[fileStream.Length];
        fileStream.Read(bytes, 0,(int)fileStream.Length);
        fileStream.Close();
        int width = 1024;
        int height = 727;
        Texture2D texture = new Texture2D(width, height);
        texture.LoadImage(bytes);
        Sprite sprite = Sprite.Create(texture, new Rect(0, 0, texture.width, texture.height),new Vector2(0.5f,0.5f));
        Ioimage.sprite = sprite;
    }
//www方式
    IEnumerator WwwLoadImage()
    {
        //www加载的时候，在文件夹位置前给一个file://
        WWW www = new WWW("file://E:\\桌面文件\\桌面\\test\\1.jpg");
        yield return www;
        if (www!=null && string.IsNullOrEmpty(www.error))
        {
            Texture2D texture = www.texture;
            Sprite sprite = Sprite.Create(texture, new Rect(0, 0, texture.width, texture.height), new Vector2(0.5f, 0.5f));
            Wwwimage.sprite = sprite;
        }
    }