判断鼠标触摸点是否在UI范围内（NGUI版）

using UnityEngine;

using System.Collections;

public class MouseTool

{

    /// <summary>

    /// 鼠标是否在UI范围内

    /// </summary>

    /// <param name="trans"></param>

    /// <returns></returns>

    public static bool IsTouchInUi(Transform trans)

    {

        bool isInRect = false;

        float _mapWidth = trans.GetComponent<UIWidget>().width;//获取ui的实际宽度

        float _mapHight = trans.GetComponent<UIWidget>().height;//长度

        Vector3 newPos = trans.localPosition;

//注意，别用错方法了，只能是InverseTransformPoint

Vector3 mousePos = trans.parent.InverseTransformPoint(UICamera.currentCamera.ScreenToWorldPoint(Input.mousePosition));

        if (mousePos.x < (newPos.x + _mapWidth / 2) && mousePos.x > (newPos.x - _mapWidth / 2) &&

            mousePos.y < (newPos.y + _mapHight / 2) && mousePos.y > (newPos.y - _mapHight / 2))

        {

            isInRect = true;

        }

        return isInRect;

    }

}