if?(_enable)?{
????float?rx?=?Screen.width?/?_original.x;
????float?ry?=?Screen.height?/?_original.y;
????if?(rx?<?ry)?{
????????float?r?=?rx;
????????float?cha?=?(1f?-?r)?*?Screen.height;
????????float?x?=?(1f?-?r)?/?2?*?Screen.width;
????????float?y?=?cha?/?2f;
????????this.gameObject.transform.localScale?=?new?Vector3?(r,?r,?1);
????????this.gameObject.transform.localPosition?=?new?Vector3?(x,?y,?0);
????????_rect.sizeDelta?=?new?Vector2?((_original.x?-?Screen.width),?cha?/?r);
????}?else?{
????????float?r?=?ry;
????????float?cha?=?(1f?-?r)?*?Screen.width;
????????float?y?=?(1?-?r)?/?2?*?Screen.height;
????????float?x?=?cha?/?2f;
????????this.gameObject.transform.localScale?=?new?Vector3?(r,?r,?1);
????????this.gameObject.transform.localPosition?=?new?Vector3?(x,?y,?0);
????????_rect.sizeDelta?=?new?Vector2?(cha?/?r,?(_original.y?-?Screen.height));
????}
}

else中的代碼應(yīng)該是一個道理，為了讓代碼更完整一點， 就傳上來了。

先說一下我自己的理解：

this.gameObject.transform.localScale = new Vector3 (r, r, 1);//這句應(yīng)該是等比例縮放

this.gameObject.transform.localPosition = new Vector3 (x, y, 0);//這句應(yīng)該是居中（結(jié)合上面x和y的值來看）

_rect.sizeDelta = new Vector2 ((_original.x - Screen.width), cha / r);//這句應(yīng)該是變化_rect的大小， 但是不知道Vector2構(gòu)造函數(shù)中的值有什么講究

另外， _rect的大小需要單獨做變化嗎？難道不是隨著父元素的值一起變化的嗎？