Unity 中把一张大图（Texture）分割多个小图（Sprite）方法；

Texture2D bg = Resources.Load<Texture2D>("bg1");

sprites = new Sprite[9];

for (int i = 0; i < 3; i++)

        {

            for (int j = 0; j < 3; j++)

            {

                sprites[index] = Sprite.Create(bg, new Rect(width * j, height * i, width, height), new Vector2(0, 0));

                sprites[index].name = index.ToString();

                GameObject game = Instantiate(box, list.transform) as GameObject;

                game.GetComponent<Image>().sprite = sprites[index];

                index++;

            }

        }