优化ScrollView

  1 //////////////////////////////////////////////////////////////////////////
  2 // 乐探游戏版权所有
  3 // 
  4 // 作者：THW
  5 // 时间：2015/07/11
  6 // 描述：自定义UITable
  7 // 说明：主要用于多行多列的ScrollView
  8 //
  9 //////////////////////////////////////////////////////////////////////////
 10 
 11 using UnityEngine;
 12 using System.Collections.Generic;
 13 
 14 public class CustomUITable : UIWidgetContainer
 15 {
 16     public float cellWidth = 200f;
 17     public float cellHeight = 200f;
 18 
 19     private UIScrollView mScrollView;
 20     private UIPanel mPanel;
 21     private GameObject itemPrefab;
 22 
 23     private List<CustomSVItemData> m_DataList;        // 当前Grid要显示的数据集合
 24     private CustomSVItemBaseMono[] m_itemList;  // 当前Grid要显示的Item最大数量集合
 25     private Vector3 defaultVec;
 26     private float lastY = -1;
 27     private int maxRow;     // 最多能显示的总行数
 28     private int maxCol;     // 最多能显示的总列数
 29     private int maxItemNum; // 最多能显示的Item数量
 30     private float mSpace;   // 每个Item的间距
 31     private bool mInitDone;
 32     private bool mRepositionNow;
 33 
 34     /// <summary>
 35     /// Init 必须在LateUpdate中执行
 36     /// </summary>
 37     public void Init()
 38     {
 39         if (mPanel == null || mScrollView == null || itemPrefab == null)
 40             return;
 41 
 42         mInitDone = true;
 43 
 44         Vector2 viewSize = mPanel.GetViewSize();    // 这个值必须在LateUpdate中才能获得
 45 
 46         // 得到总列数
 47         maxCol = Mathf.Max(1, (int)(viewSize.x / cellWidth));
 48         mSpace = maxCol > 1 ? (viewSize.x - cellWidth * maxCol) / (maxCol + 1) : 0;
 49 
 50         // 得到总行数
 51         maxRow = Mathf.CeilToInt(viewSize.y / (cellHeight + mSpace)) + 1;
 52 
 53         maxItemNum = maxCol * maxRow;
 54 
 55         m_itemList = new CustomSVItemBaseMono[maxItemNum];
 56 
 57         // 预先创建Item
 58         CreateItem();
 59     }
 60 
 61     public void Awake()
 62     {
 63         mPanel = NGUITools.FindInParents<UIPanel>(gameObject);
 64         mScrollView = NGUITools.FindInParents<UIScrollView>(gameObject);
 65         itemPrefab = transform.FindChild("Item").gameObject;
 66 
 67         defaultVec = new Vector3(0, cellHeight, 0);
 68         m_DataList = new List<CustomSVItemData>();
 69     }
 70 
 71     public void Start()
 72     {
 73 
 74     }
 75 
 76     public void LateUpdate()
 77     {
 78         if (!mInitDone)
 79         {
 80             Init();
 81         }
 82     }
 83 
 84     /// <summary>
 85     /// 重新排版——每次Item数量有变动的时候，需要调用
 86     /// </summary>
 87     public bool repositionNow
 88     {
 89         set
 90         {
 91             mRepositionNow = value;
 92         }
 93     }
 94 
 95     public void AddItem(CustomSVItemData data)
 96     {
 97         m_DataList.Add(data);
 98         mRepositionNow = true;
 99     }
100 
101     public void AddItems(List<CustomSVItemData> dataList)
102     {
103         m_DataList.AddRange(dataList);
104         mRepositionNow = true;
105     }
106 
107     public void RemoveItem(CustomSVItemData data)
108     {
109         m_DataList.Remove(data);
110         mRepositionNow = true;
111     }
112 
113     public void Clear()
114     {
115         m_DataList.Clear();
116         mRepositionNow = true;
117     }
118 
119     protected virtual void Update()
120     {
121         if (!mInitDone)
122             return;
123 
124         if (Mathf.Abs(mScrollView.transform.localPosition.y - lastY) > cellHeight * 0.5 || mRepositionNow)
125         {
126             Validate();
127             lastY = mScrollView.transform.localPosition.y;
128         }
129     }
130 
131     private void ConstrainWithinPanel()
132     {
133         if (mPanel != null)
134         {
135             mPanel.ConstrainTargetToBounds(transform, true);
136             mScrollView.UpdateScrollbars(true);
137             mScrollView.RestrictWithinBounds(true);
138         }
139     }
140 
141     private void Validate()
142     {
143         if (!mInitDone)
144             return;
145 
146         mRepositionNow = false;
147 
148         Vector3 position = mPanel.transform.localPosition;
149         float _ver = Mathf.Max(position.y, 0);
150 
151         int startRowIndex = Mathf.FloorToInt(_ver / (cellHeight + mSpace));     // 当前要显示的行
152         
153         int startIndex = startRowIndex * maxCol;        // 开始显示数据的索引
154         int endIndex = Mathf.Min(m_DataList.Count, startIndex + maxItemNum);   // 最大显示数据的索引
155         int curCol = 0;
156         int curRow = startRowIndex;
157         int curIndex = 0;
158         for (int i = startIndex; i < startIndex + maxItemNum; i++)
159         {
160             CustomSVItemBaseMono item = m_itemList[curIndex];
161             Vector3 pos = item.transform.localPosition;
162             float depth = pos.z;
163 
164             if (i < endIndex)
165             {
166                 item.mData = m_DataList[i];
167                 pos = new Vector3(cellWidth * curCol + (curCol + 1) * mSpace, -cellHeight * curRow - (curRow + 1) * mSpace, depth);
168                 item.gameObject.SetActive(true);
169             }
170             else
171             {
172                 pos = defaultVec;
173             }
174             item.transform.localPosition = pos;
175 
176             if (++curCol >= maxCol)
177             {
178                 curCol = 0;
179                 ++curRow;
180             }
181             ++curIndex;
182         }
183     }
184 
185     private void CreateItem()
186     {
187         for (int i = 0; i < maxItemNum; i++)
188         {
189             GameObject go = Instantiate(itemPrefab) as GameObject;
190             go.transform.parent = transform;
191             go.transform.localScale = Vector3.one;
192             go.SetActive(false);
193             go.name = "Item" + i;
194             CustomSVItemBaseMono item = go.GetComponent<CustomSVItemBaseMono>();
195             item.Init();
196             m_itemList[i] = item;
197         }
198     }
199 }

 1 //////////////////////////////////////////////////////////////////////////
 2 // 乐探游戏版权所有
 3 // 
 4 // 作者：THW
 5 // 时间：2015/07/11
 6 // 描述：Scroll view 的 Item 基类
 7 // 说明：其他Item类必须继承此基类
 8 //
 9 //////////////////////////////////////////////////////////////////////////
10 
11 using UnityEngine;
12 using System.Collections;
13 
14 public class CustomSVItemBaseMono : MonoBehaviour
15 {
16     protected CustomSVItemData m_Data;
17 
18     public virtual bool Init()
19     {
20         return true;
21     }
22 
23     public CustomSVItemData mData
24     {
25         set
26         {
27             m_Data = value;
28             OnChange();
29         }
30         get
31         {
32             return m_Data;
33         }
34     }
35 
36     protected virtual void OnChange()
37     {
38     }
39 
40     private virtual void Update()
41     {
42         if (m_Data.bRefresh)
43         {
44             m_Data.bRefresh = false;
45             OnChange();
46         }
47     }
48 }
49 
50 /// <summary>
51 /// 自定义Scroll view item 的数据内容
52 /// </summary>
53 public class CustomSVItemData
54 {
55     public bool bRefresh;       //  是否要刷新Item
56 }