public void ScreenUISelfAdptation(Transform scaleUI)

{

　　float widthrate = UnityEngine.Screen.width / 1920.0f;

　　float heightrate = UnityEngine.Screen.height / 1080.0f;

　　float postion_x = scaleUI.GetComponent<RectTransform>().anchoredPosition.x * widthrate;

　　float postion_y = scaleUI.GetComponent<RectTransform>().anchoredPosition.y * heightrate;

　　scaleUI.localScale = new Vector3(widthrate, heightrate, 1);

　　scaleUI.GetComponent<RectTransform>().anchoredPosition = new Vector2(postion_x, postion_y);

}

UnityEngine.Screen.width和UnityEngine.Screen.height是你要发布的屏幕分辨率大小。

1920.0f; x 1080.0f;是你制作UI时Game视图中的分辨率大小。