unity 安卓端通过滑动屏幕实现对物体的移动以及缩放

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unity 安卓端通过滑动屏幕实现对物体的移动以及缩放（通过对Camera操作）

将代码拖到MainCamera上打包到安卓端即可实现模型的移动以及缩放

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class ScaleAndMove : MonoBehaviour {

// 记录手指触屏的位置  Vector2 m_screenpos = new Vector2();Vector3 oldPosition;// Use this for initialization  void Start(){//记录开始摄像机的Position    oldPosition = Camera.main.transform.position;}// Update is called once per frame  void Update(){     if (Input.touchCount <= 0)        return;    // 1个手指触摸屏幕      if (Input.touchCount == 1)    {        if (Input.touches[0].phase == TouchPhase.Began)        {            // 记录手指触屏的位置              m_screenpos = Input.touches[0].position;        }        // 手指移动          else if (Input.touches[0].phase == TouchPhase.Moved)        {            // 移动摄像机              Camera.main.transform.Translate(new Vector3(-Input.touches[0].deltaPosition.x * Time.deltaTime*0.1f, -Input.touches[0].deltaPosition.y * Time.deltaTime*0.1f, 0));        }    }    else if (Input.touchCount > 1)    {        // 记录两个手指的位置          Vector2 finger1 = new Vector2();        Vector2 finger2 = new Vector2();        // 记录两个手指的移动          Vector2 mov1 = new Vector2();        Vector2 mov2 = new Vector2();        for (int i = 0; i < 2; i++)        {            Touch touch = Input.touches[i];            if (touch.phase == TouchPhase.Ended)                break;            if (touch.phase == TouchPhase.Moved)            {                float mov = 0;                if (i == 0)                {                    finger1 = touch.position;                    mov1 = touch.deltaPosition;                }                else                {                    finger2 = touch.position;                    mov2 = touch.deltaPosition;                    if (finger1.x > finger2.x)                    {                        mov = mov1.x;                    }                    else                    {                        mov = mov2.x;                    }                    if (finger1.y > finger2.y)                    {                        mov += mov1.y;                    }                    else                    {                        mov += mov2.y;                    }                    Camera.main.transform.Translate(0, 0, mov * Time.deltaTime*0.1f);                }        }    }    //控制物体始终在屏幕中    Camera.main.transform.position = new Vector3(Mathf.Clamp(transform.position.x, -4f, 5.5f), Mathf.Clamp(transform.position.y, 0.5f, 10f), Mathf.Clamp(transform.position.z, -0.9f, 4.6f));}//通过按钮让物体回到最初的位置public void BackRS(){    Camera.main.transform.position = oldPosition;}

}

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