[游戏开发]unity 根据图片比例适应

  void Dofit()
    {

        Transform canvasObj = GameObject.Find("Canvas").transform;
        float width = canvasObj.GetComponent<RectTransform>().sizeDelta.x;
        float height = 1;

        if (GetComponent<RawImage>())
        {
            Texture tex = GetComponent<RawImage>().texture;

            float tw = tex.width;
            float th = tex.height;
            //图片宽高比例 
            float xyper = tw / th;
             height = width / xyper; //根据宽度计算高度
        

        }
        else
        {
           Sprite sp= GetComponent<Image>().sprite;
 
           float xyper = sp.rect.size.x / sp.rect.size.y;
           height = width / xyper; //根据宽度计算高度

        }

        GetComponent<RectTransform>().sizeDelta = new Vector2(width, height);
    }