unity判断鼠标是否悬停在某个UI上

public Image testImage;
bool isIn;

void Update()
{
    isIn = RectTransformUtility.RectangleContainsScreenPoint(testImage.GetComponent<RectTransform>(), Input.mousePosition);
    Debug.Log("鼠标是否悬浮在图片1上："+ isIn);
}