using UnityEngine;
using System.Collections;


public class Test : MonoBehaviour {
private Vector3 screenPoint;
private Vector3 offset;
// Update is called once per frame
void Update () {
for (int i = 0; i < Input.touchCount; ++i) {
if (Input.GetTouch(i).phase == TouchPhase.Began) {
screenPoint = Camera.main.WorldToScreenPoint(gameObject.transform.position);


offset = gameObject.transform.position - Camera.main.ScreenToWorldPoint(new Vector3(Input.GetTouch(i).position.x, Input.GetTouch(i).position.y, screenPoint.z));
}
if(Input.GetTouch(i).phase == TouchPhase.Moved) {
Vector3 curScreenPoint = new Vector3(Input.GetTouch(i).position.x, Input.GetTouch(i).position.y, screenPoint.z);


Vector3 curPosition = Camera.main.ScreenToWorldPoint(curScreenPoint) + offset;
transform.position = curPosition;
}
}
}


Unity3D手机中Input类touch详解：


1.Input.touchCount 触摸随之增长，一秒50次增量。


2.Input.GetTouch(0).phase==TouchPhase.Moved 手指滑动中最后一帧滑动的状态是运动的。


3.TouchPhase  触摸的几个状态。


4.Touch.deltaPosition 增量位置（Input.GetTouch(0).deltaPosition）最后一帧滑动的值，只返回xy轴坐标，也可用vector3（z轴为0），所以一般用vector2接收。

static var aa:int;
function Update () {
if(Input.touchCount>0)
{
print(Input.touchCount);
}
}
function OnGUI()
{
GUI.Label(Rect(34,34,34,34),"sdff");
}

  touchCount指的是触摸帧的数量。要注意的是：touch事件 只能在模拟器或者真机上运行（已测试通过），大约一秒钟touch不放。touchCount+50次左右。2.Input.touches 触摸列表。


// Prints number of fingers touching the screen
//输出触摸在屏幕上的手指数量
function Update () {
var fingerCount = 0;
for (var touch : Touch in Input.touches) {
if (touch.phase != TouchPhase.Ended && touch.phase != TouchPhase.Canceled)
fingerCount++;
}
if (fingerCount > 0)
print ("User has " + fingerCount + " finger(s) touching the screen");
}
 
   复制代码
    3.让cube随着touch 移动代码：static var count:int; //定义touchCount数
var particle_:GameObject;//定义存放cube对象
var touchposition:Vector3; //存储移动三维坐标值
function Update () {
if(Input.touchCount>0)
{
count+=Input.touchCount;}
if((Input.touchCount>0&&Input.GetTouch(0).phase==TouchPhase.Moved)) //[color=Red]如果点击手指touch了  并且手指touch的状态为移动的[/color]
{
touchposition=Input.GetTouch(0).deltaPosition;  //[color=Red]获取手指touch最后一帧移动的xy轴距离[/color]
particle_.transform.Translate(touchposition.x*0.01,touchposition.y*0.01,0);//[color=Red]移动这个距离[/color]
}}
function OnGUI()
{
GUI.Label(Rect(10,10,100,30),"cishu:"+count.ToString());
GUI.Label(Rect(10,50,100,30),touchposition.ToString());
}