Unity实现手指滑屏

　　我使用Input的Touch和EasyTouch各实现了滑屏方案，基本原理就是得到滑屏移动时的二维向量，通过向量获取究竟是向哪个方向滑动，通过自定义的状态来实现。下面上代码：

下面是EasyTouch实现的：

using UnityEngine;
using System.Collections;

public enum SwipeDir
{ 
    idle,   //没有滑动
    left,
    right,
    up,
    down
}

public class MyEasyTouch : MonoBehaviour 
{
    [HideInInspector]
    public  SwipeDir swipeDir = SwipeDir.idle;
    Vector2 swipeVector;

    public bool isLeftSwipe = false;
    public bool isRightSwipe = false;
    public bool isUpSwipe = false;
    public bool isDownSwipe = false;


    void OnEnable()
    {
        //EasyTouch.On_Swipe += OnSwipe;
        EasyTouch.On_SwipeEnd += OnSwipe;
    }

    void OnDisable()
    {
        //EasyTouch.On_Swipe -= OnSwipe;
        EasyTouch.On_SwipeEnd -= OnSwipe;
 

    }

    void OnDestroy()
    {
        EasyTouch.On_SwipeEnd -= OnSwipe;
    }

    public void OnSwipe(Gesture gesture)
    {
        swipeVector = gesture.swipeVector;
        switch (GetCurrentSwipeDirection())
        { 
            case SwipeDir.left:
                isLeftSwipe = true;
                break;
            case SwipeDir.right:
                isRightSwipe = true;
                break;
            case SwipeDir.up:
                isUpSwipe = true;
                break;
            case SwipeDir.down:
                isDownSwipe = true;
                break;

        }
    }

    public SwipeDir GetCurrentSwipeDirection()
    {
        if (Mathf.Abs(swipeVector.x) > Mathf.Abs(swipeVector.y))
        {
            if (swipeVector.x > 0)
            {
                return SwipeDir.right;
            }
            else if (swipeVector.x < 0)
            {
                return SwipeDir.left;
            }
        }
        if (Mathf.Abs(swipeVector.x) < Mathf.Abs(swipeVector.y))
        {
            if (swipeVector.y > 0)
            {
                return SwipeDir.up;
            }
            else if (swipeVector.y < 0)
            {
                return SwipeDir.down;
            }
        }

        return SwipeDir.idle;
    }

}

下面是Unity自带的Touch类实现的：

using UnityEngine;
using System.Collections;

enum TouchMoveDir
{
    idle,left,right,up,down
}

public class TouchTest : MonoBehaviour {
    public GameObject target;
    float minDis = 1;
    TouchMoveDir moveDir;

    // Use this for initialization
    void Start () {
        Input.multiTouchEnabled = true;
        Input.simulateMouseWithTouches = true;
    }
    
    // Update is called once per frame
    void Update () {
        if (Input.touchCount > 0 && Input.GetTouch(0).phase == TouchPhase.Moved) 
        {
            if(Input.GetTouch(0).deltaPosition.sqrMagnitude > minDis)
            {
                Vector2 deltaDir = Input.GetTouch(0).deltaPosition;
                if(Mathf.Abs(deltaDir.x) > Mathf.Abs(deltaDir.y))
                {
                    moveDir = deltaDir.x>0?TouchMoveDir.right:TouchMoveDir.left;
                }
                if(Mathf.Abs(deltaDir.y) > Mathf.Abs(deltaDir.x))
                {
                    moveDir = deltaDir.y>0?TouchMoveDir.up:TouchMoveDir.down;
                }
            }
        }

        if (Input.touchCount > 0 && Input.GetTouch (0).phase == TouchPhase.Ended) {
            moveDir = TouchMoveDir.idle;
        }

        if (moveDir == TouchMoveDir.right) {
            Debug.Log("right");
            target.transform.position += transform.right * 0.2f;
        }
        if (moveDir == TouchMoveDir.left) {
            Debug.Log("left");
            target.transform.position -= transform.right * 0.2f;
        }
        if (moveDir == TouchMoveDir.up) {
            target.transform.position += transform.up * 0.2f;
        }
        if (moveDir == TouchMoveDir.down) {
            target.transform.position -= transform.up * 0.2f;
        }
    }
}