using UnityEngine;

using System.Collections;

public class Demo : MonoBehaviour

{

    public Vector3 lastMonseDown;

    /// <summary>

    /// 判断手指触摸的方向

    /// </summary>

    /// <returns></returns>

    TouchDir GetTouchDir()

    {

        //记录第一次手指点击的坐标点

        if (Input.GetMouseButtonDown())

        {

            lastMonseDown = Input.mousePosition;

        }

        //UICamera.hoveredObject防止NGUI点击穿透问题

        if (Input.GetMouseButtonUp() && UICamera.hoveredObject == null)

        {

            //结束坐标-开始坐标

            Vector3 mouseUp = Input.mousePosition;

            Vector3 touchOffset = mouseUp - lastMonseDown;

            //滑动超过50像素,算一次正确的滑动

            if (Mathf.Abs(touchOffset.x) >  || Mathf.Abs(touchOffset.y) > )

            {

                if (Mathf.Abs(touchOffset.x) > Mathf.Abs(touchOffset.y) && touchOffset.x > )

                {

                    return TouchDir.Right;

                }

                else if (Mathf.Abs(touchOffset.x) > Mathf.Abs(touchOffset.y) && touchOffset.x < )

                {

                    return TouchDir.Left;

                }

                else if (Mathf.Abs(touchOffset.x) < Mathf.Abs(touchOffset.y) && touchOffset.y > )

                {

                    return TouchDir.Top;

                }

                else if (Mathf.Abs(touchOffset.x) < Mathf.Abs(touchOffset.y) && touchOffset.y < )

                {

                    return TouchDir.Bottom;

                }

            }

            else

            {

                return TouchDir.None;

            }

        }

        return TouchDir.None;

    }

}

/// <summary>

/// 触摸的方向

/// </summary>

public enum TouchDir

{

    None,

    Left,

    Right,

    Top,

    Bottom

}