void Update()
{
Vector2 position;
//屏幕坐标转化为Canvas相对坐标
RectTransformUtility.ScreenPointToLocalPointInRectangle(GameObject.Find
("Canvas").transform as RectTransform, Input.mousePosition, null, out position);
if (isShow)
{
tooltipUI.Show();
tooltipUI.SetTooltipPosition(position);
}
if (isDrag)
{
dragItem.Show();
dragItem.SetDragItemPosition(position);
}
}