FingerGestures研究院之初探Unity手势操作（一）

using UnityEngine;
using System.Collections;

public class FingerEvent :  MonoBehaviour {

    void OnEnable()
    {
    	//启动时调用，这里开始注册手势操作的事件。

    	//按下事件： OnFingerDown就是按下事件监听的方法，这个名子可以由你来自定义。方法只能在本类中监听。下面所有的事件都一样！！！
        FingerGestures.OnFingerDown += OnFingerDown;
        //抬起事件
		FingerGestures.OnFingerUp += OnFingerUp;
	    //开始拖动事件
	    FingerGestures.OnFingerDragBegin += OnFingerDragBegin;
        //拖动中事件...
        FingerGestures.OnFingerDragMove += OnFingerDragMove;
        //拖动结束事件
        FingerGestures.OnFingerDragEnd += OnFingerDragEnd;
		//上、下、左、右、四个方向的手势滑动
		FingerGestures.OnFingerSwipe += OnFingerSwipe;
		//连击事件 连续点击事件
		FingerGestures.OnFingerTap += OnFingerTap;
		//手指触摸屏幕中事件调用一下三个方法
		FingerGestures.OnFingerStationaryBegin += OnFingerStationaryBegin;
		FingerGestures.OnFingerStationary += OnFingerStationary;
		FingerGestures.OnFingerStationaryEnd += OnFingerStationaryEnd;
		//长按事件
		FingerGestures.OnFingerLongPress += OnFingerLongPress;

    }

    void OnDisable()
    {
    	//关闭时调用，这里销毁手势操作的事件
    	//和上面一样
        FingerGestures.OnFingerDown -= OnFingerDown;
		FingerGestures.OnFingerUp -= OnFingerUp;
		FingerGestures.OnFingerDragBegin -= OnFingerDragBegin;
        FingerGestures.OnFingerDragMove -= OnFingerDragMove;
        FingerGestures.OnFingerDragEnd -= OnFingerDragEnd;
		FingerGestures.OnFingerSwipe -= OnFingerSwipe;
		FingerGestures.OnFingerTap -= OnFingerTap;
		FingerGestures.OnFingerStationaryBegin -= OnFingerStationaryBegin;
		FingerGestures.OnFingerStationary -= OnFingerStationary;
		FingerGestures.OnFingerStationaryEnd -= OnFingerStationaryEnd;
		FingerGestures.OnFingerLongPress -= OnFingerLongPress;
    }

    //按下时调用
    void OnFingerDown( int fingerIndex, Vector2 fingerPos )
    {
		//int fingerIndex 是手指的ID 第一按下的手指就是 0 第二个按下的手指就是1。。。一次类推。
		//Vector2 fingerPos 手指按下屏幕中的2D坐标

		//将2D坐标转换成3D坐标
        transform.position = GetWorldPos( fingerPos );
		Debug.Log(" OnFingerDown ="  +fingerPos);
    }

	//抬起时调用
	void OnFingerUp( int fingerIndex, Vector2 fingerPos, float timeHeldDown )
	{

		Debug.Log(" OnFingerUp ="  +fingerPos);
	}

	//开始滑动
	void OnFingerDragBegin( int fingerIndex, Vector2 fingerPos, Vector2 startPos )
    {
   	 	 Debug.Log("OnFingerDragBegin fingerIndex =" + fingerIndex  + " fingerPos ="+fingerPos +"startPos =" +startPos);
    }
	//滑动结束
	void OnFingerDragEnd( int fingerIndex, Vector2 fingerPos )
	{

	 	Debug.Log("OnFingerDragEnd fingerIndex =" + fingerIndex  + " fingerPos ="+fingerPos);
	}
	//滑动中
    void OnFingerDragMove( int fingerIndex, Vector2 fingerPos, Vector2 delta )
    {
           transform.position = GetWorldPos( fingerPos );
			Debug.Log(" OnFingerDragMove ="  +fingerPos); 

    }
	//上下左右四方方向滑动手势操作
	void OnFingerSwipe( int fingerIndex, Vector2 startPos, FingerGestures.SwipeDirection direction, float velocity )
    {
		//结果是 Up Down Left Right 四个方向
		Debug.Log("OnFingerSwipe " + direction + " with finger " + fingerIndex);

    }

	//连续按下事件， tapCount就是当前连续按下几次
	void OnFingerTap( int fingerIndex, Vector2 fingerPos, int tapCount )
    {

        Debug.Log("OnFingerTap " + tapCount + " times with finger " + fingerIndex);

    }

	//按下事件开始后调用，包括 开始 结束 持续中状态只到下次事件开始！
         //OnFingerStationary 事件和  OnFingerDragMove 有一个区别。
         //OnFingerStationary 是手指触摸在屏幕中的事件，而OnFingerDragMove是先触摸一下然后滑动的事件。
         //如果你需要时时捕获手指触摸屏幕中的事件时 用OnFingerStationary 即可
	void OnFingerStationaryBegin( int fingerIndex, Vector2 fingerPos )
	{

		 Debug.Log("OnFingerStationaryBegin " + fingerPos + " times with finger " + fingerIndex);
	}

	void OnFingerStationary( int fingerIndex, Vector2 fingerPos, float elapsedTime )
	{

		 Debug.Log("OnFingerStationary " + fingerPos + " times with finger " + fingerIndex);

	}

	void OnFingerStationaryEnd( int fingerIndex, Vector2 fingerPos, float elapsedTime )
	{

		 Debug.Log("OnFingerStationaryEnd " + fingerPos + " times with finger " + fingerIndex);
	}

	//长按事件
	void OnFingerLongPress( int fingerIndex, Vector2 fingerPos )
	{

		Debug.Log("OnFingerLongPress " + fingerPos );
	}

	//把Unity屏幕坐标换算成3D坐标
    Vector3 GetWorldPos( Vector2 screenPos )
    {
        Camera mainCamera = Camera.main;
        return mainCamera.ScreenToWorldPoint( new Vector3( screenPos.x, screenPos.y, Mathf.Abs( transform.position.z - mainCamera.transform.position.z ) ) );
    }
}

    // Return the GameObject at the given screen position, or null if no valid object was found
    public static GameObject PickObject( Vector2 screenPos )
    {
        Ray ray = Camera.main.ScreenPointToRay( screenPos );
        RaycastHit hit;

        if( Physics.Raycast( ray, out hit ) )
            return hit.collider.gameObject;

        return null;
    }