关于移动端触屏输入控制的API的使用汇总(二)_Unity 单指与双指Touch事件捕获(网友项目使用总结)

关于移动端触屏输入控制的API的使用汇总(二)_Unity 单指与双指Touch事件捕获(网友项目使用总结)

原文出处http://blog.csdn.net/reipeng/article/details/50960178

using UnityEngine;  using System.Collections;  using UnityEngine.EventSystems;    public delegate void TouchEventHandler(TouchEventArgs args);  public class TouchManager : MonoBehaviour   {      public static TouchManager instance;      private static bool isInited = false;        public static bool IsInited()      {          return (null != instance && isInited);      }        public static TouchManager GetInstance()      {          return instance;      }            public event TouchEventHandler onFirstTouchBegan;      public event TouchEventHandler onFirstTouchMoved;      public event TouchEventHandler onFirstTouchEnded;      public event TouchEventHandler onTwoTouchMoved;        private Vector2 touchStartPos;      private bool getTwoTouch;      private float disBtwTouch;      private bool isMouseDown;        public void Start()      {          onFirstTouchBegan = new TouchEventHandler(InitFirstBeganHandler);          onFirstTouchMoved = new TouchEventHandler(InitFirstMovedHandler);          onFirstTouchEnded = new TouchEventHandler(InitFirstEndedHandler);          onTwoTouchMoved = new TouchEventHandler(InitTwoMovedHandler);            touchStartPos = Vector2.zero;          getTwoTouch = false;          isMouseDown = false;          instance = this;          isInited = true;      }        private void InitFirstBeganHandler(TouchEventArgs args)       {          //Debug.Log("InitFirstBeganHandler " + args.ToString());      }        private void InitFirstMovedHandler(TouchEventArgs args)      {          //Debug.Log("InitFirstMovedHandler " + args.ToString());      }      private void InitFirstEndedHandler(TouchEventArgs args)      {          //Debug.Log("InitFirstEndedHandler " + args.ToString());      }      private void InitTwoMovedHandler(TouchEventArgs args)      {          //Debug.Log("InitTwoMovedHandler " + args.ToString());      }             void Update()       {          if (Application.platform == RuntimePlatform.Android || Application.platform == RuntimePlatform.IPhonePlayer)          {              GetTouchEvent();          }          else           {              GetMouseEvent();          }      }        private void GetTouchEvent()      {          if (Input.touchCount == 0)          {              getTwoTouch = false;              return;          }                    if (EventSystem.current.IsPointerOverGameObject(Input.GetTouch(0).fingerId))          {               getTwoTouch = false;              return;          }             if (Input.touchCount == 1)          {              Touch firstTouch = Input.GetTouch(0);              if (firstTouch.phase == TouchPhase.Began)              {                         touchStartPos = firstTouch.position;                  onFirstTouchBegan(new TouchEventArgs(touchStartPos, 0));                  return;              }              if (firstTouch.phase == TouchPhase.Moved)              {                  if (getTwoTouch) return;                    Vector2 deltaMv = firstTouch.position - touchStartPos;                  onFirstTouchMoved(new TouchEventArgs(touchStartPos, 0));                  touchStartPos = firstTouch.position;                  return;              }              if (firstTouch.phase == TouchPhase.Ended)              {                  if (getTwoTouch) return;                  onFirstTouchEnded(new TouchEventArgs(touchStartPos, 0));                  return;              }              return;          }          else if (Input.touchCount == 2)          {              Touch firstTouch = Input.GetTouch(0);              Touch secondTouch = Input.GetTouch(1);                float curDis = UnityHelper.GetGenScreenDis(firstTouch.position, secondTouch.position);              if (IsTouchDown(firstTouch) || IsTouchDown(secondTouch))              {                  if (!getTwoTouch)                  {                      getTwoTouch = true;                      disBtwTouch = curDis;                      return;                  }                    float deltaDis = curDis - disBtwTouch;                  onTwoTouchMoved(new TouchEventArgs(Vector2.zero, deltaDis));                  disBtwTouch = curDis;                  return;              }                   getTwoTouch = true;              return;          }      }        private bool IsTouchDown(Touch touch)      {          return (touch.phase == TouchPhase.Stationary || touch.phase == TouchPhase.Moved);      }        private void GetMouseEvent()       {          if (EventSystem.current.IsPointerOverGameObject())          {              return;          }            float wheelValue = Input.GetAxis("Mouse ScrollWheel");          if (wheelValue != 0)          {              onTwoTouchMoved(new TouchEventArgs(Vector2.zero, wheelValue));          }            if (Input.GetMouseButtonDown(0))          {              touchStartPos = Input.mousePosition;              onFirstTouchBegan(new TouchEventArgs(touchStartPos, 0));              isMouseDown = true;              return;          }            if (Input.GetMouseButtonUp(0))          {              touchStartPos = Input.mousePosition;              onFirstTouchEnded(new TouchEventArgs(touchStartPos, 0));              isMouseDown = false;              return;          }            if(Input.GetMouseButton(0))          {              if (!isMouseDown) { return; }              Vector2 deltaMv = ((Vector2)Input.mousePosition) - touchStartPos;              if (Vector2.zero == deltaMv) { return; }              onFirstTouchMoved(new TouchEventArgs(touchStartPos, 0));              touchStartPos = Input.mousePosition;              return;          }      }  }    public class TouchEventArgs : System.EventArgs   {      public Vector2 touchedPos;      public float twoMvDis;        public TouchEventArgs(Vector2 pos, float mvDis)       {          touchedPos = UnityHelper.GetGenScreenPos(pos);          twoMvDis = mvDis;      }        public override string ToString()      {          return string.Format("touchedPos: {0}\t twoMvDis: {1}", touchedPos, twoMvDis);      }  }       public class UnityHelper  {      /// <summary>      ///  获取通用的屏幕坐标，即忽略dpi的坐标      /// </summary>      public static Vector2 GetGenScreenPos(Vector2 originPos)       {          Vector2 result = originPos;          result.x /= (1.000f * Screen.width);          result.y /= (1.000f * Screen.height);          return result;      }      /// <summary>      /// 根据通用屏幕坐标计算出当前的实际屏幕坐标      /// </summary>      /// <param name="genPos"></param>      /// <returns></returns>      public static Vector2 GetScreenPosFromGen(Vector2 genPos)      {          Vector2 result = genPos;          result.x *= Screen.width;          result.y *= Screen.height;          return result;      }       /// <summary>       /// 计算通用的屏幕距离，即可以忽略dpi的规范距离       /// </summary>       /// <param name="pos1"></param>       /// <param name="pos2"></param>       /// <returns></returns>      public static float GetGenScreenDis(Vector2 pos1, Vector2 pos2)      {          return Vector2.Distance(GetGenScreenPos(pos1), GetGenScreenPos(pos2));      }  } 

使用方法，在保证TouchManager初始化完全的情况下，调用：

TouchManager.GetInstance().onTwoTouchMoved += OnDoubleTouchMoved; 

添加两指相对运动的事件响应逻辑。

不需要响应了，则调用：

TouchManager.GetInstance().onTwoTouchMoved -= OnDoubleTouchMoved; 

就可以了。 附上OnDoubleTouchMoved函数原型：

private void OnDoubleTouchMoved(TouchEventArgs args)  {       Debug.Log("OnDoubleTouchMoved :" + args.ToString() );   }