[Unity3d][NGUI]自写循环UIScrollView组件. 使用少量Item循环使

本组件根据四爷和Aklan的脚本为基础写的.

转载请注明出处:

本组件使用时挂载在ScrollView下的Grid上即可.Item的数量只需要能覆盖一个页面的数量就可以了.

using UnityEngine;using System;using System.Collections;using System.Collections.Generic;/// <summary>/// Loop循环ScrollView/// 使用的时候挂载在ScrollView下面的UIGrid上就可以了/// 然后UIGrid下面放置部分Item即可实现循环Item/// </summary>[RequireComponent(typeof(UIGrid))]public class LoopScrollView_ZX : MonoBehaviour{#region Members/// <summary>/// 存储物件列表/// </summary>private List<UIWidget> m_itemList = new List<UIWidget>();private Vector4 m_posParam;private Transform m_cachedTransform;/// <summary>/// 起始下标/// </summary>private int m_startIndex;/// <summary>/// 最大长度/// </summary>private int m_MaxCount;/// <summary>/// 物件刷新代理事件/// </summary>/// <param name="go"></param>public delegate void OnItemChange(GameObject go);private OnItemChange m_pItemChangeCallBack;/// <summary>/// item点击代理事件/// </summary>/// <param name="go"></param>/// <param name="i"></param>public delegate void OnClickItem(GameObject go, int i);private OnClickItem m_pOnClickItemCallBack;/// <summary>/// 父ScrollView/// </summary>public UIScrollView m_scrollView;#endregionvoid Awake(){m_cachedTransform = this.transform;m_scrollView = m_cachedTransform.parent.GetComponent<UIScrollView>();// 设置Cullm_scrollView.GetComponent<UIPanel>().cullWhileDragging = true;UIGrid _grid = this.GetComponent<UIGrid>();float _cellWidth = _grid.cellWidth;float _cellHeight = _grid.cellHeight;m_posParam = new Vector4(_cellWidth,_cellHeight,_grid.arrangement == UIGrid.Arrangement.Horizontal ? 1 : 0,_grid.arrangement == UIGrid.Arrangement.Vertical ? 1 : 0);}/// <summary>/// 初始化表/// </summary>public void Init(bool _clickItem){m_itemList.Clear();for (int i = 0; i < m_cachedTransform.childCount; ++i){Transform _t = m_cachedTransform.GetChild(i);UIWidget uiW = _t.GetComponent<UIWidget>();if (uiW == null){uiW = _t.gameObject.AddComponent<UIWidget>();}uiW.name = m_itemList.Count.ToString();m_itemList.Add(uiW);// 允许响应点击事件if (_clickItem){// 碰撞BoxCollider _c = _t.GetComponent<BoxCollider>();if (_c == null){_c = _t.gameObject.AddComponent<BoxCollider>();uiW.autoResizeBoxCollider = true;}// 事件接收UIEventListener _listener = _t.GetComponent<UIEventListener>();if (_listener == null){_listener = _t.gameObject.AddComponent<UIEventListener>();}// 点击回调_listener.onClick = OnClickListItem;}}}/// <summary>/// 更新表单/// </summary>/// <param name="_count">数量</param>public void UpdateListItem(int _count){m_startIndex = 0;m_MaxCount = _count;for (int i = 0; i < m_itemList.Count; i++){UIWidget _item = m_itemList[i];_item.name = i.ToString();_item.Invalidate(true);NGUITools.SetActive(_item.gameObject, i < _count);}}public List<UIWidget> GetItemList(){return m_itemList;}public List<T> GetItemList<T>() where T : Component{List<T> _list = new List<T>();foreach (UIWidget _wd in m_itemList){_list.Add(_wd.GetComponent<T>());}return _list;}public List<T> GetItemListInChildren<T>() where T : Component{List<T> _list = new List<T>();foreach (UIWidget _wd in m_itemList){_list.Add(_wd.GetComponentInChildren<T>());}return _list;}void LateUpdate(){if (m_itemList.Count <= 1){return;}int _sourceIndex = -1;int _targetIndex = -1;int _sign = 0;bool firstVislable = m_itemList[0].isVisible;bool lastVisiable = m_itemList[m_itemList.Count – 1].isVisible;// 如果都显示,那么返回if (firstVislable == lastVisiable){return;}// 得到需要替换的源和目标if (firstVislable){_sourceIndex = m_itemList.Count – 1;_targetIndex = 0;_sign = 1;}else if (lastVisiable){_sourceIndex = 0;_targetIndex = m_itemList.Count – 1;_sign = -1;}// 如果小于真正的初始索引或大于真正的结束索引,返回int realSourceIndex = int.Parse(m_itemList[_sourceIndex].gameObject.name);int realTargetIndex = int.Parse(m_itemList[_targetIndex].gameObject.name);if (realTargetIndex <= m_startIndex ||realTargetIndex >= (m_MaxCount – 1)){m_scrollView.restrictWithinPanel = true;return;}m_scrollView.restrictWithinPanel = false;UIWidget movedWidget = m_itemList[_sourceIndex];Vector3 _offset = new Vector2(_sign * m_posParam.x * m_posParam.z,_sign * m_posParam.y * m_posParam.w);movedWidget.cachedTransform.localPosition = m_itemList[_targetIndex].cachedTransform.localPosition + _offset;m_itemList.RemoveAt(_sourceIndex);m_itemList.Insert(_targetIndex, movedWidget);movedWidget.name = (realSourceIndex > realTargetIndex ? (realTargetIndex – 1) : (realTargetIndex + 1)).ToString();OnItemChangeMsg(movedWidget.gameObject);}/// <summary>/// 设置代理/// </summary>/// <param name="_onItemChange"></param>/// <param name="_onClickItem"></param>public void SetDelegate(OnItemChange _onItemChange,OnClickItem _onClickItem){m_pItemChangeCallBack = _onItemChange;if (_onClickItem != null){m_pOnClickItemCallBack = _onClickItem;}}void OnItemChangeMsg(GameObject go){if (m_pItemChangeCallBack != null){m_pItemChangeCallBack(go);}}void OnClickListItem(GameObject go){int _i = int.Parse(go.name);if (m_pOnClickItemCallBack != null){m_pOnClickItemCallBack(go, _i);}}}测试脚本.挂载在Grid上即可.using UnityEngine;using System.Collections;/// <summary>/// 测试脚本/// </summary>public class Test : MonoBehaviour{LoopScrollView_ZX m_scrollView;void Start(){m_scrollView = this.GetComponent<LoopScrollView_ZX>();m_scrollView.Init(true);m_scrollView.UpdateListItem(100);m_scrollView.SetDelegate(null, OnClickTest);}/// <summary>/// 点击事件/// </summary>/// <param name="go"></param>/// <param name="i"></param>void OnClickTest(GameObject go, int i){Debug.Log(go.name + "," + i);}}

，仿佛一支飘荡在水上的华丽咏叹调。