这篇文章主要为大家详细介绍了Unity实现首字母检索器，文中示例代码介绍的非常详细，具有一定的参考价值，感兴趣的小伙伴们可以参考一下

本文实例为大家分享了Unity实现首字母检索器的具体代码，供大家参考，具体内容如下

需要实现一个类似 “城市选择器”的功能 网上基本都是用原生或者前端来实现功能 其他大概的思路都差不多 这里提供一个Unity 实现的思路

先看一下效果

这里用到了 SuperScrollView 这个插件 来实现功能

ListText.cs  // 核心控制类  代码写的比较随意 大概的功能已经实现，需要根据实际需要进行优化。


using SuperScrollView;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
 
public class ListText : MonoBehaviour
{
 public LoopListView2 mLoopListView;
 public Text Select_Text;
 public RectTransform Right_Content;
 public GameObject Tag_Prefab;
 public string[] Tags = new string[] { "A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L", "M", "N", "O", "P", "Q", "R", "S", "T", "U", "V", "W", "X", "Y", "Z", "#" };
 
 public int TreeViewItemCount
 {
 get
 {
 return mItemDataList.Count;
 }
 }
 // Start is called before the first frame update
 void Start()
 {
 Init();
 
 Keys.Clear();
 for (int i = 0; i < Tags.Length; ++i)
 {
 CityData cityData = new CityData();
 cityData.Key = Tags[i];
 List<string> value = new List<string>();
 value.Add("Item" + Tags[i] + Random.Range(0, 6).ToString());
 cityData.Value = value;
 
 Keys.Add(cityData);
 }
 DoRefreshDataSource();
 int count = TreeViewItemCount;
 //tells mTreeItemCountMgr there are how many TreeItems and every TreeItem has how many ChildItems.
 for (int i = 0; i < count; ++i)
 {
 int childCount = GetItemDataByIndex(i).ChildCount;
 //second param "true" tells mTreeItemCountMgr this TreeItem is in expand status, that is to say all its children are showing.
 AddTreeItem(childCount, true);
 }
 
 mLoopListView.InitListView(GetTotalItemAndChildCount(), OnGetItemByIndex);
 }
 
 public void AddTreeItem(int count, bool isExpand)
 {
 KeyData data = new KeyData();
 data.mTreeItemIndex = mTreeItemDataList.Count;
 data.mChildCount = count;
 data.mIsExpand = isExpand;
 mTreeItemDataList.Add(data);
 mIsDirty = true;
 }
 public int GetTotalItemAndChildCount()
 {
 int count = mTreeItemDataList.Count;
 if (count == 0)
 {
 return 0;
 }
 UpdateAllTreeItemDataIndex();
 return mTreeItemDataList[count - 1].mEndIndex + 1;
 }
 LoopListViewItem2 OnGetItemByIndex(LoopListView2 listView, int index)
 {
 if (index < 0)
 {
 return null;
 }
 
 KeyData countData = QueryTreeItemByTotalIndex(index);
 if (countData == null)
 {
 return null;
 }
 int treeItemIndex = countData.mTreeItemIndex;
 ValueData treeViewItemData = GetItemDataByIndex(treeItemIndex);
 if (countData.IsChild(index) == false)// if is a TreeItem
 {
 //get a new TreeItem
 LoopListViewItem2 item = listView.NewListViewItem("KeyItem");
 KeyItem itemScript = item.GetComponent<KeyItem>();
 if (item.IsInitHandlerCalled == false)
 {
 item.IsInitHandlerCalled = true;
 itemScript.Init();
 //itemScript.SetClickCallBack(this.OnExpandClicked);
 }
 //update the TreeItem's content
 itemScript.mText.text = treeViewItemData.mName;
 itemScript.SetItemData(treeItemIndex, countData.mIsExpand);
 return item;
 }
 else // if is a TreeChildItem
 {
 //childIndex is from 0 to ChildCount.
 //for example, TreeChildItem0_0 is the 0'th child of TreeItem0
 //and TreeChildItem1_2 is the 2'th child of TreeItem1
 int childIndex = countData.GetChildIndex(index);
 ItemData itemData = treeViewItemData.GetChild(childIndex);
 if (itemData == null)
 {
 return null;
 }
 //get a new TreeChildItem
 LoopListViewItem2 item = listView.NewListViewItem("ValueItem");
 ValueItem itemScript = item.GetComponent<ValueItem>();
 if (item.IsInitHandlerCalled == false)
 {
 item.IsInitHandlerCalled = true;
 itemScript.Init();
 }
 //update the TreeChildItem's content
 itemScript.SetItemData(itemData, treeItemIndex, childIndex);
 return item;
 }
 
 }
 
 List<ValueData> mItemDataList = new List<ValueData>();
 
 int mTreeViewItemCount = 20;
 int mTreeViewChildItemCount = 30;
 
 // List<string, List<string>> keys = new List<string, List<string>>();
 
 
 ArrayList Keys = new ArrayList();
 
 void DoRefreshDataSource()
 {
 mItemDataList.Clear();
 
 
 for (int i = 0; i < Keys.Count; i++)
 {
 ValueData tData = new ValueData();
 CityData city = Keys[i] as CityData;
 tData.mName = "" + city.Key;
 mItemDataList.Add(tData);
 // int childCount = Random.Range(0, 6);
 for (int j = 0; j < city.Value.Count; j++)
 {
 ItemData childItemData = new ItemData();
 childItemData.mName = "Item" + city.Value[j] + ":Child" + j;
 childItemData.mDesc = "Item Desc For " + childItemData.mName;
 childItemData.mStarCount = Random.Range(0, 6);
 childItemData.mFileSize = Random.Range(20, 999);
 tData.AddChild(childItemData);
 }
 }
 //for (int i = 0; i < keys.Count; ++i)
 //{
 // ValueData tData = new ValueData();
 // tData.mName = "" + keys[]
 // mItemDataList.Add(tData);
 // int childCount = Random.Range(0, 6);
 
 /