[Unity开发]NGUI代码实现ScrollView(放大视图)

最新推荐文章于 2022-02-11 20:36:40 发布

转载最新推荐文章于 2022-02-11 20:36:40 发布 · 181 阅读

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原文链接：https://my.oschina.net/u/2438875/blog/516295

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#游戏 #python

本文介绍如何使用Unity配合NGUI实现一个带有图片下载和缩放功能的滚动视图。具体步骤包括：创建MainCameraScript脚本，实现图片下载、创建UI根节点、添加滚动视图和图片视图等组件，以及编写交互逻辑。

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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;
		}
	}
}