UIGridView 源码

using System;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;//Introduction: 无限列表
//Content上禁止挂载ContentSizeFilter和LayOutGroup之类组件
[DisallowMultipleComponent]
[RequireComponent(typeof(ScrollRect))]
public class UIGridView : MonoBehaviour
{private Action<Transform, int> _handle;public enum Arrangement{Horizontal = 0,Vertical,}public enum HorizontalAlign{Left,Middle,Right,}public enum VerticalAlign{Top,Middle,Bottom,}public Arrangement arrangement = Arrangement.Vertical;// 当选择水平或垂直流动是有用，指每行/列最大个数public int MaxPerLine{get { return maxPerLine; }set { SetMaxPerLine(value); }}public HorizontalAlign horizontalAlign = HorizontalAlign.Left;public VerticalAlign verticalAlign = VerticalAlign.Top;public Vector2 viewPort;public float rowSpace = 0;public float columuSpace = 0;public float marginTop = 0;public float marginBottom = 0;public float marginLeft = 0;public float marginRight = 0;public int maxPerLine;public int childCount; //需要渲染的总数据个数public GameObject item;public GameObject Child{get { return item; }set { SetItem(value); }}public int ChildCount{get { return childCount; }set { SetChildCount(value, true); }}public Vector2 ViewPort{get { return viewPort; }set { SetViewPort(value); }}ScrollRect scrollRect;RectTransform content;Vector2 itemSize;List<Transform> items;Dictionary<int, int> contains;List<int> outOfContains;int scrollLineIndex; //当前第一个元素索引int totalCount; //在UI中显示的个数(不乘以maxPerLine)Vector2 startPos; //第一个元素所在位置int startIndex; //当前渲染起始坐标int endIndex; //当前渲染结束坐标void Start(){maxPerLine = maxPerLine == 0 ? 1 : maxPerLine;items = new List<Transform>();contains = new Dictionary<int, int>();outOfContains = new List<int>();scrollRect = transform.GetComponent<ScrollRect>();content = scrollRect.content;if (content == null){Debug.Log("ScrollRect " + scrollRect.gameObject.name + " Has No Content, Please Check And Retry.");return;}//viewPort = scrollRect.viewport.rect.size;if (item != null)SetItem(item);content.anchorMax = new Vector2(0, 1);content.anchorMin = new Vector2(0, 1);content.pivot = new Vector2(0, 1);ReBuild();}public void ReBuild(){if (scrollRect == null || content == null || item == null) return;ResetChildren();Vector2 maskSize = viewPort;int count = 0;if (arrangement == Arrangement.Horizontal){count = Mathf.CeilToInt(maskSize.x / itemSize.x) + 1; //横向列数startPos = Vector2.zero;startPos.x = marginLeft;if (verticalAlign == VerticalAlign.Top){startPos.y = -marginTop;}else if (verticalAlign == VerticalAlign.Middle){startPos.y = -(maskSize.y * 0.5f - (itemSize.y * maxPerLine + (maxPerLine - 1) * rowSpace) * 0.5f);}else if (verticalAlign == VerticalAlign.Bottom){startPos.y = -(maskSize.y - marginBottom - itemSize.y * maxPerLine - rowSpace * (maxPerLine - 1));}}else if (arrangement == Arrangement.Vertical){count = Mathf.CeilToInt(maskSize.y / itemSize.y) + 1; //竖向行数startPos = Vector2.zero;startPos.y = -marginTop; //重置开始节点位置if (horizontalAlign == HorizontalAlign.Left){startPos.x = marginLeft;}else if (horizontalAlign == HorizontalAlign.Middle){startPos.x = (maskSize.x * 0.5f - (itemSize.x * maxPerLine + (maxPerLine - 1) * columuSpace) * 0.5f);}else if (horizontalAlign == HorizontalAlign.Right){startPos.x = maskSize.x - marginRight - itemSize.x * maxPerLine - columuSpace * (maxPerLine - 1);}}totalCount = count;SetChildCount(childCount, true);BackTop();scrollRect.onValueChanged.RemoveAllListeners();scrollRect.onValueChanged.AddListener(OnValueChanged);}//列表滚动private void OnValueChanged(Vector2 vec){switch (arrangement){case Arrangement.Horizontal:vec.x = Mathf.Clamp(vec.x, 0, 1);break;case Arrangement.Vertical:vec.y = Mathf.Clamp(vec.y, 0, 1);break;}int curLineIndex = GetCurLineIndex();if (curLineIndex != scrollLineIndex)UpdateRectItem(curLineIndex, false);}private int GetCurLineIndex(){switch (arrangement){case Arrangement.Horizontal:returnMathf.FloorToInt(Mathf.Abs(content.anchoredPosition.x < 0.1f ? content.anchoredPosition.x : 0.1f - marginLeft) /(columuSpace + itemSize.x));case Arrangement.Vertical:returnMathf.FloorToInt(Mathf.Abs(content.anchoredPosition.y > -0.1f ? content.anchoredPosition.y : -0.1f - marginTop) /(rowSpace + itemSize.y));}return 0;}private void UpdateRectItem(int curLineIndex, bool forceRender){if (curLineIndex < 0)return;startIndex = curLineIndex * maxPerLine;endIndex = (curLineIndex + totalCount) * maxPerLine;if (endIndex >= childCount)endIndex = childCount;contains.Clear(); //渲染序号outOfContains.Clear(); //items的索引for (int i = 0; i < items.Count; i++)//如果当前已渲染的item中包含{int index = int.Parse(items[i].gameObject.name);if (index < startIndex || index >= endIndex){outOfContains.Add(i);items[i].gameObject.SetActive(false);}else{items[i].gameObject.SetActive(true);contains.Add(index, i);}}// *************更改渲染****************for (int i = startIndex; i < endIndex; i++){if (!contains.ContainsKey(i)){Transform child = items[outOfContains[0]];outOfContains.RemoveAt(0);child.gameObject.SetActive(true);int row = i / maxPerLine;int col = i % maxPerLine;if (arrangement == Arrangement.Vertical)child.localPosition = startPos +new Vector2(col * itemSize.x + (col) * columuSpace,-row * itemSize.y - (row) * rowSpace);elsechild.localPosition = startPos +new Vector2(row * itemSize.x + (row) * columuSpace,-col * itemSize.y - (col) * rowSpace);child.gameObject.name = i.ToString();if (_handle != null)_handle(child, i);}else if (forceRender){if (_handle != null)_handle(items[contains[i]], i);}}scrollLineIndex = curLineIndex;}/// 移除当前所有private void ResetChildren(){items.Clear();for (int i = 0; i < content.childCount; i++){Transform child = content.GetChild(i);child.gameObject.SetActive(false);}}// 创建新节点private RectTransform CreateItem(int index){Transform child;if (content.childCount > index){child = content.GetChild(index);}else{GameObject obj = GameObject.Instantiate(item) as GameObject;obj.transform.SetParent(content);obj.transform.localScale = Vector3.one;child = obj.transform;}child.gameObject.name = index.ToString();items.Add(child);return child as RectTransform;}// 设置资源public void SetItem(GameObject child){if (child == null) return;this.item = child;RectTransform itemTrans = child.transform as RectTransform;itemTrans.pivot = new Vector2(0, 1);itemSize = itemTrans.sizeDelta;//ReBuild();}// 更新需要渲染的个数public void SetChildCount(int value, bool forceRender){if (value < 0) childCount = 0;else childCount = value;if (totalCount <= 0)//还未初始化return;if (value > items.Count && items.Count < maxPerLine * totalCount){//当前格子数量少于应生成的数量int count = items.Count;int max = value < maxPerLine * totalCount ? value : maxPerLine * totalCount;for (int i = count; i < max; i++){int row = i / maxPerLine;int col = i % maxPerLine;RectTransform child = CreateItem(i);if (arrangement == Arrangement.Vertical)child.localPosition = startPos +new Vector2(col * itemSize.x + (col) * columuSpace,-row * itemSize.y - (row) * rowSpace);elsechild.localPosition = startPos +new Vector2(row * itemSize.x + (row) * columuSpace,-col * itemSize.y - (col) * rowSpace);}}if (content == null) return;int rc = Mathf.CeilToInt((float)childCount / (float)maxPerLine); //设置content的大小if (arrangement == Arrangement.Horizontal){content.sizeDelta = new Vector2(marginLeft + marginRight + itemSize.x * rc + columuSpace * (rc - 1),viewPort.y);if (content.sizeDelta.x > viewPort.x && content.anchoredPosition.x < viewPort.x - content.sizeDelta.x)content.anchoredPosition = new Vector2(viewPort.x - content.sizeDelta.x, content.anchoredPosition.y);}else{content.sizeDelta = new Vector2(viewPort.x, marginTop + marginBottom + itemSize.y * rc + rowSpace * (rc - 1));if (content.sizeDelta.y > viewPort.y && content.anchoredPosition.y > content.sizeDelta.y - viewPort.y)content.anchoredPosition = new Vector2(content.anchoredPosition.x, content.sizeDelta.y - viewPort.y);}UpdateRectItem(GetCurLineIndex(), true);}// 添加子节点public void AddChild(int index){if (index < 0) return;startIndex = scrollLineIndex * maxPerLine;endIndex = (scrollLineIndex + totalCount) * maxPerLine;SetChildCount(childCount + 1, index >= startIndex && index < endIndex);}// 删除子节点public void RemoveChild(int index){if (index < 0 || index >= childCount) return;startIndex = scrollLineIndex * maxPerLine;endIndex = (scrollLineIndex + totalCount) * maxPerLine;SetChildCount(childCount - 1, index >= startIndex && index < endIndex);}// <summary>// 设置显示窗口大小(现在貌似可以废弃了)public void SetViewPort(Vector2 port){if (port == viewPort) return;viewPort = port;//ReBuild();}// 设置行列最大public void SetMaxPerLine(int max){maxPerLine = max;//ReBuild();}// 返回顶部public void BackTop(){content.localPosition = Vector3.zero;UpdateRectItem(0, true);}// 返回底部public void BackBottom(){if (arrangement == Arrangement.Vertical){content.localPosition = new Vector3(0, -viewPort.y + content.sizeDelta.y, 0);}else{content.localPosition = new Vector3(viewPort.x - content.sizeDelta.x, 0);}UpdateRectItem(Mathf.CeilToInt((float)childCount / (float)maxPerLine) - totalCount + 1, true);}public void RefreshViewItem(){UpdateRectItem(scrollLineIndex, true);}public void SetArrangement(int arr){arrangement = (Arrangement)arr;}public void SetHorizontal(int h){horizontalAlign = (HorizontalAlign)h;}public void SetVerticle(int v){verticalAlign = (VerticalAlign)v;}public void AddChangeItemListener(Action<Transform, int> handle){_handle = handle;}
}

 示例：
Lua应用示例：

local Tool = require("Tool")local SprogExtendWindow = {}local mediate = nil
local gridView = nil
local extendItem = nil
local extendItemInfo = nil
local sortList = nil
local extendCfgs = nillocal rewardState = 
{UNFINISH = 0,  --可领取UNREACH  = 1,  --未达成FINISHED = 2,  --已领取
}function SprogExtendWindow.Init(data)mediate = data-- 创建ITEM实例ResMgr.LoadAssets("prefab", { "SprogExtendItem" },function(objs)extendItem = objs[0]end)extendItemInfo = {} -- 服务器下发数据sortList = {} -- 前端已排序处理，用于显示的数据SprogExtendWindow.InitGridView()SprogExtendWindow.RegistEvents()SprogExtendWindow.UpdateAllExtendInfo()return SprogExtendWindow
endfunction SprogExtendWindow.InitGridView()gridView = mediate:FindChild("Layer_Sprite/panelGroup/extendPanel/bottom/Scroll View"):GetComponent("UIGridView") -- 获取UIGridView组件gridView.maxPerLine = 1gridView.rowSpace = 1gridView:SetItem(extendItem)gridView:SetViewPort(Vector2(565,325))-- 在ScrollView拖动时，UIGridView会回调即将出现的item，客户端只需要填入相应的UI数据.-- PS: 此函数会不停地调用，得考虑性能问题，避免处理过大的数据gridView:AddChangeItemListener(function(transform, index)local index = index + 1if sortList and sortList[index] thenlocal item = sortList[index]Tool.subGetObject(transform, "time", "Text").text = item.config.time .. " " .. item.config.idTool.subGetObject(transform, "content", "Text").text = item.config.nameTool.subGetObject(transform, "image", "Image").sprite = Tool.LoadImgSpriteFromAb("image", item.config.img)SprogExtendWindow.SetStateInfo(item.state, transform)transform:FindChild("Button").onClick = function(obj, eventData)SprogExtendWindow.CheckExtendItemInfo(item.config.id, transform)endendend)endfunction SprogExtendWindow.RegistEvents()mediate:AddClick("Layer_Sprite/panelGroup/extendPanel/top/btn_num", function () log("按钮1")end)mediate:AddClick("Layer_Sprite/panelGroup/extendPanel/top/btn_link", function () log("按钮2")end)mediate:AddClick("Layer_Sprite/panelGroup/extendPanel/top/btn_share", function () log("按钮3")end)
endfunction SprogExtendWindow.InitScrollView()endfunction SprogExtendWindow.UpdateAllExtendInfo()-- TEST,选用临时数据local data = {[1] = {id = 1, type = 1, time = "2020.01.01", name = "床", img = "yxdt_tx1.png", vip = 1, liquanNum = 99999},[2] = {id = 2, type = 1, time = "2020.01.02", name = "前", img = "yxdt_tx1.png", vip = 2, liquanNum = 99999},[3] = {id = 3, type = 1, time = "2020.01.03", name = "明", img = "yxdt_tx1.png", vip = 3, liquanNum = 99999},[4] = {id = 4, type = 1, time = "2020.01.04", name = "月", img = "yxdt_tx1.png", vip = 4, liquanNum = 99999},[5] = {id = 5, type = 1, time = "2020.01.05", name = "光", img = "yxdt_tx1.png", vip = 5, liquanNum = 99999},[6] = {id = 6, type = 1, time = "2020.01.06", name = "床", img = "yxdt_tx1.png", vip = 6, liquanNum = 99999},[7] = {id = 7, type = 1, time = "2020.01.07", name = "前", img = "yxdt_tx1.png", vip = 7, liquanNum = 99999},   [8] = {id = 8, type = 1, time = "2020.01.08", name = "明", img = "yxdt_tx1.png", vip = 8, liquanNum = 99999},[9] = {id = 9, type = 1, time = "2020.01.09", name = "月", img = "yxdt_tx1.png", vip = 9, liquanNum = 99999},[10] = {id = 10, type = 1, time = "2020.01.10", name = "光", img = "yxdt_tx1.png", vip = 10, liquanNum = 99999},[11] = {id = 11, type = 1, time = "2020.01.01", name = "床", img = "yxdt_tx1.png", vip = 1, liquanNum = 99999},[12] = {id = 12, type = 1, time = "2020.01.02", name = "前", img = "yxdt_tx1.png", vip = 2, liquanNum = 99999},[13] = {id = 13, type = 1, time = "2020.01.03", name = "明", img = "yxdt_tx1.png", vip = 3, liquanNum = 99999},[14] = {id = 14, type = 1, time = "2020.01.04", name = "月", img = "yxdt_tx1.png", vip = 4, liquanNum = 99999},[15] = {id = 15, type = 1, time = "2020.01.05", name = "光", img = "yxdt_tx1.png", vip = 5, liquanNum = 99999},[16] = {id = 16, type = 1, time = "2020.01.06", name = "床", img = "yxdt_tx1.png", vip = 6, liquanNum = 99999},[17] = {id = 17, type = 1, time = "2020.01.07", name = "前", img = "yxdt_tx1.png", vip = 7, liquanNum = 99999},   [18] = {id = 18, type = 1, time = "2020.01.08", name = "明", img = "yxdt_tx1.png", vip = 8, liquanNum = 99999},[19] = {id = 19, type = 1, time = "2020.01.09", name = "月", img = "yxdt_tx1.png", vip = 9, liquanNum = 99999},[20] = {id = 20, type = 1, time = "2020.01.10", name = "光", img = "yxdt_tx1.png", vip = 10, liquanNum = 99999},[21] = {id = 21, type = 1, time = "2020.01.01", name = "床", img = "yxdt_tx1.png", vip = 1, liquanNum = 99999},[22] = {id = 22, type = 1, time = "2020.01.02", name = "前", img = "yxdt_tx1.png", vip = 2, liquanNum = 99999},[23] = {id = 23, type = 1, time = "2020.01.03", name = "明", img = "yxdt_tx1.png", vip = 3, liquanNum = 99999},[24] = {id = 24, type = 1, time = "2020.01.04", name = "月", img = "yxdt_tx1.png", vip = 4, liquanNum = 99999},[25] = {id = 25, type = 1, time = "2020.01.05", name = "光", img = "yxdt_tx1.png", vip = 5, liquanNum = 99999}} extendItemInfo = {}for k, v in ipairs(data) doextendItemInfo[v.id] = {   config = v, -- 本地配置state = math.random(0, 2) -- 随机一个状态}endSprogExtendWindow.OnSortAllExtendItem()gridView.ChildCount = #sortList -- 设置当前item总数gridView:ReBuild() -- 启动UIGridView
end-- 整理数据并排序
function SprogExtendWindow.OnSortAllExtendItem()-- 按rewardState分组, 可领取>未达成>已领取local templist = {}for index = 1, 3 dofor _,v in ipairs(extendItemInfo) doif index == v.state + 1 thenif templist[index] == nil thentemplist[index] = {}endtable.insert(templist[index], v)endendend-- 每组按VIP等级排序for _,v in ipairs(templist) dotable.sort(v, function (a, b)return a.config.vip > b.config.vipend)endsortList = {}for _,v in ipairs(templist) dofor _,m in ipairs(v) dotable.insert(sortList, m)endend-- log("排序后列表 " .. tostring(sortList))
endfunction SprogExtendWindow.SetStateInfo(state, obj)local text = nillocal isInteract = nilif state == rewardState.UNREACH thentext = "未达成"isInteract = falseelseif state == rewardState.UNFINISH thentext =  "可领取"isInteract = trueelseif state == rewardState.FINISHED thentext =  "已领取"isInteract = falseendobj.transform:FindChild("Button").interactable = isInteractTool.subGetObject(obj, "Button/Text", "Text").text = text
endfunction SprogExtendWindow.CheckExtendItemInfo(id, obj)if extendItemInfo ~= nil and extendItemInfo[id] ~= nil thenlocal item = extendItemInfo[id]local reqSuccess = function(www)--local data = Json.decode(www.text).datalog("领取成功，data: " .. CC.uu.Dump(data))item.state = 2SprogExtendWindow.SetStateInfo(item.state, obj)endlocal reqFailed = function(err)log("领取失败:" .. tostring(err))end-- 发送请求local Url = Tool.UrlMgr.UrlMapping("http://172.0.0.1:8000/GetTestData", {id = id, channelId = id})Tool.HttpPost(Url, nil, reqSuccess, reqSuccess)end
endfunction SprogExtendWindow.Destroy()endreturn SprogExtendWindow

Unity组件挂载：