Unity中实现在屏幕滑动获取滑动方向

一下代码拷贝过去直接运行就可以使用。。。。。。。。。。。把自己的功能改到Debug处就行

using UnityEngine;
using System.Collections;

public class jarodInputController : MonoBehaviour
{

private float fingerActionSensitivity = Screen.width * 0.05f; //手指动作的敏感度，这里设定为 二十分之一的屏幕宽度.
//
private float fingerBeginX;
private float fingerBeginY;
private float fingerCurrentX;
private float fingerCurrentY;
private float fingerSegmentX;
private float fingerSegmentY;
//
private int fingerTouchState;
//
private int FINGER_STATE_NULL = 0;
private int FINGER_STATE_TOUCH = 1;
private int FINGER_STATE_ADD = 2;
// Use this for initialization
void Start()
{
fingerActionSensitivity = Screen.width * 0.05f;
fingerBeginX = 0;
fingerBeginY = 0;
fingerCurrentX = 0;
fingerCurrentY = 0;
fingerSegmentX = 0;
fingerSegmentY = 0;

fingerTouchState = FINGER_STATE_NULL;
}
// Update is called once per frame
void Update()
{

if (Input.GetKeyDown(KeyCode.Mouse0))
{

if (fingerTouchState == FINGER_STATE_NULL)
{
fingerTouchState = FINGER_STATE_TOUCH;
fingerBeginX = Input.mousePosition.x;
fingerBeginY = Input.mousePosition.y;
}

}

if (fingerTouchState == FINGER_STATE_TOUCH)
{
fingerCurrentX = Input.mousePosition.x;
fingerCurrentY = Input.mousePosition.y;
fingerSegmentX = fingerCurrentX - fingerBeginX;
fingerSegmentY = fingerCurrentY - fingerBeginY;

}

if (fingerTouchState == FINGER_STATE_TOUCH)
{
float fingerDistance = fingerSegmentX * fingerSegmentX + fingerSegmentY * fingerSegmentY;

if (fingerDistance > (fingerActionSensitivity * fingerActionSensitivity))
{
toAddFingerAction();
}
}

if (Input.GetKeyUp(KeyCode.Mouse0))
{
fingerTouchState = FINGER_STATE_NULL;
}
}

private void toAddFingerAction()
{

fingerTouchState = FINGER_STATE_ADD;

if (Mathf.Abs(fingerSegmentX) > Mathf.Abs(fingerSegmentY))
{
fingerSegmentY = 0;
}
else
{
fingerSegmentX = 0;
}

if (fingerSegmentX == 0)
{
if (fingerSegmentY > 0)
{
Debug.Log("up");
}
else
{
Debug.Log("down");
}
}
else if (fingerSegmentY == 0)
{
if (fingerSegmentX > 0)
{
Debug.Log("right");
}
else
{
Debug.Log("left");
}
}

}
}