private void Update()
{
//使提示框和拖拽时出现的物体跟随鼠标
Vector2 position;
RectTransformUtility.ScreenPointToLocalPointInRectangle(GameObject.Find("Canvas").transform as RectTransform,
Input.mousePosition, ClickManager._Instance.FindEnableCamera(Camera.allCameras), out position); //把鼠标的屏幕坐标转换为UI的相对坐标
if (isdrag)
{
dragItemUI.show();
dragItemUI.SetLocalPos(position); //设置拖拽物体的坐标
}
else if (isshow)
{
UI.show();
UI.SetLocalPos(position); //设置提示框的坐标
}
}