尊重原创，转载：http://www.cnblogs.com/daxiaxiaohao/p/4745549.html

Unity开发NGUI代码实现ScrollView(放大视图)

下载NGUI包
导入NGUI3.9.1版本package

创建MainCameraScript.cs脚本
MainCameraScript.cs

using UnityEngine;
using System.Collections;public class MainCameraScript : MonoBehaviour { // Use this for initialization void Start () { } // Update is called once per frame void Update () { } } 

创建NGUI根节点的方法

    private GameObject Window{ set; get;}void CreateUI() { //创建根节点 this.Window = NGUITools.CreateUI(false).gameObject; }

在Window上添加滚动子视图

  private UIScrollView scrollView;void CreateUI(){//创建根节点this.Window = NGUITools.CreateUI(false).gameObject; //在根节点上创建一个UIScrollView子控件 this.scrollView = NGUITools.AddChild<UIScrollView>(this.Window); }

添加下载图片的方法

 private Texture texture;private UITexture    imageView;//一个协程用到的函数,下载图片IEnumerator DownloadTexture(){WWW www = new WWW ("http://p.baidupcs.com/file/00fb26654a14f822a8b8d4f99bffff4f?bkt=p2-nj-562&fid=4213918792-250528-600499188078355&time=1440052584&sign=FDTAXERBH-DCb740ccc5511e5e8fedcff06b081203-JvUURjnKMtJDPCeN7DC01lNSiAM%3D&to=pb&fm=Nan,B,G,bs&sta_dx=0&sta_cs=0&sta_ft=png&sta_ct=0&fm2=Nanjing02,B,G,bs&newver=1&newfm=1&secfm=1&flow_ver=3&expires=8h&rt=sh&r=853121535&mlogid=2433540290&vuk=4213918792&vbdid=724775054&fin=icon.png&fn=icon.png&uta=0&rtype=0&iv=1&isw=0"); yield return www; this.texture = www.texture; }

重置ScollView上的Panel对象

  /// <summary>/// 重置Panel对象 /// </summary> /// <param name="panel">Panel.</param> void ResetPanel(UIPanel panel) { //缩小，并且居中显示 panel.transform.localPosition = new Vector3(0,0,0); //设置移动的位置 panel.clipOffset = new Vector2(0,0); //设置大小 panel.baseClipRegion = new Vector4 (0, 0, 100, 100); }

设定滚动视图的一些属性

    private UIScrollView scrollView;void CreateUI(){//创建根节点this.Window = NGUITools.CreateUI(false).gameObject; //在根节点上创建一个UIScrollView子控件 this.scrollView = NGUITools.AddChild<UIScrollView>(this.Window); //设定随意移动 this.scrollView.movement = UIScrollView.Movement.Unrestricted; //重置panel对象 ResetPanel (this.scrollView.GetComponent<UIPanel> ()); //创建ImageView CreateImage(); }

创建一个需要显示下载图片的ImageView

 private UITexture    imageView;void CreateImage(){this.imageView =  NGUITools.AddChild<UITexture> (this.scrollView.gameObject); this.imageView.SetRect (-50, -50, 100, 100); //给图片对象添加缺失组件 NGUITools.AddMissingComponent<UIDragScrollView> (this.imageView.gameObject); NGUITools.AddMissingComponent<BoxCollider> (this.imageView.gameObject); UIButton button = NGUITools.AddMissingComponent<UIButton> (this.imageView.gameObject); //添加按钮的触发事件,单击图片放大、缩小 button.onClick.Add (new EventDelegate (() => { //小图片 if (this.imageView.width == 100) { //放大 this.imageView.SetRect(-512,-512,1024,1024); } else//大图片 { ResetPanel(this.scrollView.GetComponent<UIPanel>()); this.imageView.SetRect(-50,-50,100,100); } })); //设定碰撞器对象可以自动缩放 this.imageView.autoResizeBoxCollider = true; this.imageView.ResizeCollider (); }

整个MainCameraScript.cs的代码如下

using UnityEngine;
using System.Collections;public class MainCameraScript : MonoBehaviour { private GameObject Window{ set; get;} private Texture texture; IEnumerator DownloadTexture() { WWW www = new WWW ("http://p.baidupcs.com/file/00fb26654a14f822a8b8d4f99bffff4f?bkt=p2-nj-562&fid=4213918792-250528-600499188078355&time=1440052584&sign=FDTAXERBH-DCb740ccc5511e5e8fedcff06b081203-JvUURjnKMtJDPCeN7DC01lNSiAM%3D&to=pb&fm=Nan,B,G,bs&sta_dx=0&sta_cs=0&sta_ft=png&sta_ct=0&fm2=Nanjing02,B,G,bs&newver=1&newfm=1&secfm=1&flow_ver=3&expires=8h&rt=sh&r=853121535&mlogid=2433540290&vuk=4213918792&vbdid=724775054&fin=icon.png&fn=icon.png&uta=0&rtype=0&iv=1&isw=0"); yield return www; this.texture = www.texture; } private UIScrollView scrollView; void CreateUI() { //创建根节点 this.Window = NGUITools.CreateUI(false).gameObject; //在根节点上创建一个UIScrollView子控件 this.scrollView = NGUITools.AddChild<UIScrollView>(this.Window); //设定随意移动 this.scrollView.movement = UIScrollView.Movement.Unrestricted; //重置panel对象 ResetPanel (this.scrollView.GetComponent<UIPanel> ()); //创建ImageView CreateImage(); } private UITexture imageView; void CreateImage() { this.imageView = NGUITools.AddChild<UITexture> (this.scrollView.gameObject); this.imageView.SetRect (-50, -50, 100, 100); //给图片对象添加缺失组件 NGUITools.AddMissingComponent<UIDragScrollView> (this.imageView.gameObject); NGUITools.AddMissingComponent<BoxCollider> (this.imageView.gameObject); UIButton button = NGUITools.AddMissingComponent<UIButton> (this.imageView.gameObject); //添加按钮的触发事件,单击图片放大、缩小 button.onClick.Add (new EventDelegate (() => { //小图片 if (this.imageView.width == 100) { //放大 this.imageView.SetRect(-512,-512,1024,1024); } else//大图片 { ResetPanel(this.scrollView.GetComponent<UIPanel>()); this.imageView.SetRect(-50,-50,100,100); } })); //设定碰撞器对象可以自动缩放 this.imageView.autoResizeBoxCollider = true; this.imageView.ResizeCollider (); } /// <summary> /// 重置Panel对象 /// </summary> /// <param name="panel">Panel.</param> void ResetPanel(UIPanel panel) { //缩小，并且居中显示 panel.transform.localPosition = new Vector3(0,0,0); //设置移动的位置 panel.clipOffset = new Vector2(0,0); //设置大小 panel.baseClipRegion = new Vector4 (0, 0, 100, 100); } // Use this for initialization void Start () { CreateUI (); StartCoroutine ("DownloadTexture"); } // Update is called once per frame void Update () { //设置图片 if (this.texture != null && this.imageView.mainTexture == null) { this.imageView.mainTexture = this.texture; } } } 

效果如下