Unity 加载本地图片

public Sprite DownLoadSprite(string path)
    {

        WWW www = new WWW(path);

        Texture2D texture2D = www.texture;
        Sprite sprite = Sprite.Create(texture2D, new Rect(0, 0, texture2D.width, texture2D.height), Vector2.zero);

        if (sprite == null)
            Debug.LogError("加载失败");

        return sprite;

    }