【Unity触控】实现缩放和360度观察模型、单击、双击、滑动

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class suofang : MonoBehaviour
{
    private Touch oldTouch1;  //上次触摸点1(手指1)
    private Touch oldTouch2;  //上次触摸点2(手指2)
    void Update()
    {
        //没有触摸，就是触摸点为0
        if (Input.touchCount <= 0)
        {
            return;
        }
        //单点触摸， 水平上下旋转
        if ( Input.touchCount ==1)
        {
            Touch touch = Input.GetTouch(0);
            Vector2 deltaPos = touch.deltaPosition;
            transform.Rotate(Vector3.down * deltaPos.x, Space.World);//绕Y轴进行旋转
            transform.Rotate(Vector3.right * deltaPos.y, Space.World);//绕X轴进行旋转，下面我们还可以写绕Z轴进行旋转
        }
        //多点触摸, 放大缩小
        Touch newTouch1 = Input.GetTouch(0);
        Touch newTouch2 = Input.GetTouch(1);
        //第2点刚开始接触屏幕, 只记录，不做处理
        if (newTouch2.phase == TouchPhase.Began)
        {
            oldTouch2 = newTouch2;
            oldTouch1 = newTouch1;
            return;
        }
        //计算老的两点距离和新的两点间距离，变大要放大模型，变小要缩放模型
        float oldDistance = Vector2.Distance(oldTouch1.position, oldTouch2.position);
        float newDistance = Vector2.Distance(newTouch1.position, newTouch2.position);
        //两个距离之差，为正表示放大手势， 为负表示缩小手势
        float offset = newDistance - oldDistance;
        //放大因子， 一个像素按 0.01倍来算(100可调整)
        float scaleFactor = offset / 75f;
        Vector3 localScale = transform.localScale;
        Vector3 scale = new Vector3(localScale.x + scaleFactor,
                                    localScale.y + scaleFactor,
                                    localScale.z + scaleFactor);
        //在什么情况下进行缩放
        if (scale.x >= 0.5f && scale.y <= 2f)
        {
            transform.localScale = scale;
        }
        //记住最新的触摸点，下次使用
        oldTouch1 = newTouch1;
        oldTouch2 = newTouch2;
    }
}

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
public class chuping : MonoBehaviour
{
    public Text LeftRightTips;          //左右划屏
    public Text UpDownTips;             //上下划屏
    public Text DoubleClickTips;        //双击
    private Vector2 DeltaArea;       //二维向量，滑屏区域
    private bool BoolSecondClick;           //是否为第二次点击
    private float FloFirstTime=0f;          //第一次点击时间
    private float FloSecondTime=0f;         //第二次点击时间
    // Use this for initialization
    void Start () {
        //初始化，测试数值
        DeltaArea = Vector2.zero;
  }
  // Update is called once per frame
  void Update () {
        /* 手指离开屏幕 */
        //Input.touchCount是静态整形变量，当一只手指接触到屏幕时返回1，二只手指返回2，以此类推。
        if (Input.touchCount == 1 && (Input.GetTouch(0).phase == TouchPhase.Ended))
        {    
            DeltaArea = Vector2.zero;
            //DoubleClickTips.text = "";          //如果手指离开屏幕，双击效果消失
        }
        /* 识别手指滑屏 */
        if (Input.touchCount == 1 && (Input.GetTouch(0).phase == TouchPhase.Moved))
        {
            DeltaArea.x += Input.GetTouch(0).deltaPosition.x;           //不断获取手指触屏时x,y轴的变化量并赋值给滑屏区域
            DeltaArea.y += Input.GetTouch(0).deltaPosition.y;
            if (DeltaArea.x > 150)
            {
                LeftRightTips.text = "右滑屏";
            }else if(DeltaArea.x < -150)
            {
                LeftRightTips.text = "左滑屏";
            }
            if (DeltaArea.y > 150)
            {
                UpDownTips.text = "上滑屏";
            }else if (DeltaArea.y <- 150)
            {
                UpDownTips.text = "下滑屏";
            }
        }
        /* 手指双击识别*/
        if (Input.touchCount == 1 && (Input.GetTouch(0).phase == TouchPhase.Began))
        {
            FloSecondTime = Time.time;
            if (FloSecondTime - FloFirstTime > 0.02F && FloSecondTime - FloFirstTime < 0.3F)            
            {//当第二次点击与第一次点击的时间间隔在0.02秒至0.3秒之间时
                DoubleClickTips.text = "双击了屏幕！";
            }
            else
            {
                DoubleClickTips.text = "单击了屏幕！";
            }
            FloFirstTime = Time.time;       //记录时间
        }
    }
}