Unity3d 触屏手机滑动事件（上下左右方向精确判断）

来源：互联网发布：企业协同办公软件编辑：程序博客网时间：2024/06/04 18:36

 private Vector2 st = Vector2.zero; //手指开始按下的位置      private Vector2 end = Vector2.zero; //手指拖动的位置      enum slideVector { nullVector,up,down, left, right }; //上下左右四个方向    private slideVector currentVector = slideVector.nullVector; //默认是null    private float timer;//时间计数器      public float offsetTime = 0.01f;//判断的时间间隔      void OnGUI()    {        if (Event.current.type == EventType.MouseDown)//判断当前手指是按下事件          {            st = Event.current.mousePosition;//记录开始按下的位置          }        if (Event.current.type == EventType.MouseDrag)//判断当前手指是拖动事件          {            timer += Time.deltaTime;  //计时器            if (timer > offsetTime)            {                end = Event.current.mousePosition; //记录结束下的位置                Vector2 slideDirection = st - end;                float x = slideDirection.x;                float y = slideDirection.y;                if (y < x && y > -x)                {                    if (currentVector == slideVector.right) //判断当前方向                    {                        return;                    }                                      Debug.Log("right");                    currentVector = slideVector.right; //设置方向                }                else if (y > x && y < -x)                {                    if (currentVector == slideVector.left)                    {                        return;                    }                    Debug.Log("left");                                      currentVector = slideVector.right;                }                else if (y > x && y > -x)                {                    if (currentVector == slideVector.up)                    {                        return;                    }                    Debug.Log("up");                                   currentVector = slideVector.up;                }                else if (y < x && y < -x)                {                    if (currentVector == slideVector.down)                    {                        return;                    }                    Debug.Log("down");                                     currentVector = slideVector.down;                }                timer = 0;                st = end;//初始化位置                           }                }        if (Event.current.type == EventType.MouseUp)        {            currentVector = slideVector.nullVector;       //初始化方向          }    }

2017-07-05 更新

添加了一个滑动距离不然手指刚刚触碰上去就开始判断了滑动

我个人默认距离是80 滑动距离超过80的时候才开始执行方法

    enum slideVector { nullVector, up, down, left, right };    private Vector2 touchFirst = Vector2.zero; //手指开始按下的位置    private Vector2 touchSecond = Vector2.zero; //手指拖动的位置    private slideVector currentVector = slideVector.nullVector;//当前滑动方向    private float timer;//时间计数器      public float offsetTime = 0.1f;//判断的时间间隔     public float SlidingDistance = 80f;    void OnGUI()   // 滑动方法02    {        if (Event.current.type == EventType.MouseDown)        //判断当前手指是按下事件         {            touchFirst = Event.current.mousePosition;//记录开始按下的位置        }        if (Event.current.type == EventType.MouseDrag)        //判断当前手指是拖动事件        {            touchSecond = Event.current.mousePosition;            timer += Time.deltaTime;  //计时器            if (timer > offsetTime)            {                touchSecond = Event.current.mousePosition; //记录结束下的位置                Vector2 slideDirection = touchFirst - touchSecond;                float x = slideDirection.x;                float y = slideDirection.y;                if (y + SlidingDistance < x && y > -x - SlidingDistance)                {                    if (currentVector == slideVector.left)                    {                        return;                    }                    Debug.Log("right");                                     currentVector = slideVector.left;                }                else if (y > x + SlidingDistance && y < -x - SlidingDistance)                {                    if (currentVector == slideVector.right)                    {                        return;                    }                    Debug.Log("left");                           currentVector = slideVector.right;                }                else if (y > x + SlidingDistance && y - SlidingDistance > -x)                {                    if (currentVector == slideVector.up)                    {                        return;                    }                    Debug.Log("up");                                      currentVector = slideVector.up;                }                else if (y + SlidingDistance < x && y < -x - SlidingDistance)                {                    if (currentVector == slideVector.down)                    {                        return;                    }                    Debug.Log("Down");                                       currentVector = slideVector.down;                }                timer = 0;                touchFirst = touchSecond;            }            if (Event.current.type == EventType.MouseUp)            {//滑动结束                  currentVector = slideVector.nullVector;            }        }   // 滑动方法    }

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