using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
public class ItemRect
{public Rect mRect;//格子的索引 因为是用来关联位置的 所以不存在删除或修改操作public readonly int itemIndex;//如果这个位置上存在显示的UI那么将格子的isUse属性设置为truepublic bool isUse = false;public ItemRect(float x,float y,float width,float height,int itemIndex){mRect = new Rect(x,y,width,height);this.itemIndex = itemIndex;}}public interface IItemExecute {//刷新数据void Execute_FinshData();//绑定UIvoid BindUgui();
}//抽象任何地方出每一个滑动单元的公共方法
public class ItemPropoty : MonoBehaviour, IItemExecute
{//储存的数据public object Data;public object DataKey;public ItemRect mDRect;public delegate void FreshFunc(int index);//在初始化的时候给到刷新数据的方法 public FreshFunc onUpdata;public virtual void Execute_FinshData() {BindUgui();if (onUpdata != null)onUpdata(mDRect.itemIndex);}public void Execute_PlacePos(){(transform as RectTransform).sizeDelta = mDRect.mRect.size;(transform as RectTransform).localPosition = mDRect.mRect.position;BindUgui();}/// <summary>/// 绑定UGUI 用名称查询的方式绑定UI类索引/// </summary>public virtual void BindUgui() {}}/// <summary>
/// 定制滑动单元
/// </summary>

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;public class ItemUnit_1 : ItemPropoty
{Button btn;Text txt;public override void BindUgui(){btn = transform.GetComponentInChildren<Button>();txt = transform.GetComponentInChildren<Text>();txt.text = mDRect.itemIndex.ToString();btn.onClick.AddListener(() => {txt.text = mDRect.itemIndex + " : " + mDRect.itemIndex;});}public void AddImage() {}public void ChangeImage() {}
}

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
using System.Linq;
public class CustomScroll : MonoBehaviour
{//用于显示的单元public GameObject itemUnit;private RectTransform item;//这个用来存储UI显示的实例private List<Transform> itemList;//记录所有ui应该显示的位置private Dictionary<int, ItemRect> itemRectDic;//显示的画布public RectTransform mDisplayRect;//上拉是否还有显示单位private bool? isHavePrevious = null;public bool? IsHavePrevious { get => isHavePrevious; }//下拉是否还有显示单位private bool? isHaveSubsequent = null;public bool? IsHaveSubsequent { get => isHaveSubsequent; }private ScrollRect scrollRect;//显示的行数  需要计算private int scrollRow;public int ScrollRow { get => scrollRow; }[Header("行间隙")]public float interval_Veritical;public float Interval_Veritical { get => interval_Veritical + item.rect.height; }//显示的列数private int scrollColumn;public int ScrollColumn { get => scrollColumn; }[Header("列间隙")]public float interval_Horizontal;public float Interval_Horizontal { get => interval_Horizontal + item.rect.width;}void Start(){IntializeScroll();IntializeDisplayCount(2, 30);//TODO FIX 测试用isLoad = true;}//做一些初始化的任务private void IntializeScroll(){itemList = new List<Transform>();waitChangeList = new List<ItemPropoty>();//GetComponentInParent<ScrollRect>().movementType = ScrollRect.MovementType.Clamped;scrollRect = GetComponentInParent<ScrollRect>();itemRectDic = new Dictionary<int, ItemRect>();item = itemUnit.transform as RectTransform;//初始化位置记录previousPagePos = transform.position.y;}/// <summary>/// 先计算出显示的行列/// </summary>public void IntializeDisplayCount(int columnCount, int itemCount) {SetContentSizeDelta(columnCount, itemCount);IntializeDisplayCount(scrollRow, scrollColumn, itemCount);}private void SetContentSizeDelta(int columnCount, int itemCount) {//若乱设置0或复负数直接按1处理scrollColumn = Mathf.Max(1, columnCount);//计算出显示的最大行数  item的长度scrollRow = itemCount / scrollColumn + 1;//设置显示画布的大小(transform as RectTransform).sizeDelta = new Vector2(scrollColumn * Interval_Horizontal,(scrollRow - 1) * Interval_Veritical);}//public void IntializeDisplayCount(int rowCount,int columnCount, int itemCount){//先初始化好格子的位置 在初始化位置的同时设置好显示内容的尺寸AddItemPosition(itemCount);//计算当前显示的数量 存在一个占半格子的问题 暂时未处理 可以使用rect.Overlaps 查看是否相交 根据相交的位置判断加的排数var pageSize = (transform.parent.parent as RectTransform).sizeDelta;//因为间距的问题没处理所以临时加2var pageArea = (int)(pageSize.x / Interval_Horizontal)* (int)(pageSize.y / Interval_Veritical);//TODO FIXint maxDsiplayNum = (int)pageArea + scrollColumn+2;//Debug.Log("当前最大的显示数量 : "+maxDsiplayNum);for (int i = 0; i < scrollRow && i< maxDsiplayNum; i++){Transform tmpItem = GameObject.Instantiate(itemUnit).transform;itemList.Add(tmpItem);tmpItem.localScale = Vector3.one;tmpItem.SetParent(transform, false);//tmpItem.gameObject.AddComponent<ItemUnit_1>();//tmpItem.gameObject.layer = mDisplayRect.gameObject.layer;tmpItem.gameObject.SetActive(false);tmpItem.name = i.ToString();}BenginDisplay();}/// <summary>/// 开始显示UI单元/// </summary>public void BenginDisplay() {//标记显示头for (int i = 0; i < itemRectDic.Count; i++){if (i == itemList.Count)break;//得到物体身上的属性var tmp = itemList[i].GetComponent<ItemPropoty>();//拿到对应的值itemRectDic.TryValueGet(i,out tmp.mDRect);//给定位置tmp.Execute_PlacePos();//将他设置为可见itemList[i].gameObject.SetActive(true);tmp.mDRect.isUse = true;}}private int allItemCount = 0;public int AllItemCount { get => allItemCount; }[Header("x,y轴的初始边距")]public int distance_x = 100;public int distance_y = -50;/// <summary>/// 判断元数是否为追加/// </summary>/// <param name="isSuperaddition"></param>public void AddItemPosition(int nxtCount) {int curRow,curColumn;int tmp = itemRectDic.Count;allItemCount += nxtCount;SetContentSizeDelta(scrollColumn,allItemCount);for (int i = tmp; i < tmp + nxtCount; i++){curRow = i / scrollColumn;curColumn = i % scrollColumn;var itemPos = new ItemRect(curColumn*Interval_Horizontal + distance_x,-curRow*Interval_Veritical + distance_y,item.rect.width,item.rect.height,i);itemRectDic.Add(i,itemPos);}}/// <summary>/// 查询所有排位置的最值元素 /// 做个优化 查询每一排的第一个元素就行了  这样换排的时候 如果是上一排就用index-1 下一排就是 index+scrollColumn(列数)/// </summary>/// <param name="isMax"></param>/// <returns></returns>public Transform GetBestValueItem(bool isMax){if (itemList == null){return null;}Transform bestTmp = itemList[0];for (int i = 0; i < itemList.Count; i += scrollColumn){bool result = isMax ? bestTmp.position.y < itemList[i].position.y : bestTmp.position.y > itemList[i].position.y;if (result){bestTmp = itemList[i];}}// Debug.Log(bestTmp.name);return bestTmp;}/// <summary>/// 查询最值同时把index传出去/// </summary>/// <param name="isMax"></param>/// <param name="index"></param>/// <returns></returns>public Transform GetBestValueItem(bool isMax,out int index){var tmp = GetBestValueItem(isMax);index = tmp.GetComponent<ItemPropoty>().mDRect.itemIndex;return tmp;}private List<ItemPropoty> waitChangeList;/// <summary>/// 查找到元素Y轴位置最小的元素/// </summary>/// <param name="item"></param>private void ExecuteChangeLocation(Transform item,bool isDown){Vector3 minItemPosition = GetBestValueItem(!isDown).position;//开始收集同排的元素位置for (int i = 0; i < itemList.Count; i++){if (itemList[i].Comparer_Position_Y(item.position)) {waitChangeList.SortAdd(itemList[i].GetComponent<ItemPropoty>());}}ChangeLineLocation(isDown);}/// <summary>/// 根据刷新方式做出更改位置操作/// </summary>/// <param name="isDown"></param>private void ChangeLineLocation(bool isDown) {if (waitChangeList == null || waitChangeList.Count == 0) {Debug.LogError("翻车了: ChangeLineLocation 查询失败");return;}//拿到当前最低/高位置的格子var bestValue = GetBestValueItem(!isDown).GetComponent<ItemPropoty>();#region/*int listIndex,itemIndex;for (int i = 0; i < waitChangeList.Count; i++) {if (isDown){itemIndex = bestValue.mDRect.itemIndex + i + scrollColumn;listIndex = i;}else{itemIndex = bestValue.mDRect.itemIndex - (waitChangeList.Count - 1);listIndex = scrollColumn - (waitChangeList.Count - i);}if (itemRectDic.ContainsKey(itemIndex)){//当往下显示的时候将上边隐藏部位的格子释放掉waitChangeList[listIndex].mDRect.isUse = false;//查询到左下角的首元素加上列数个单位之后 正好是下一行的位置waitChangeList[listIndex].mDRect = itemRectDic[itemIndex];waitChangeList[listIndex].Execute_PlacePos();//标记新的占用位置waitChangeList[listIndex].mDRect.isUse = true;}}*/#endregionif (isDown){//Debug.Log("发现最底面的格子 : "+bestValue.name);for (int i = 0; i < waitChangeList.Count; i++){//当再次刷新出现越界的时候    就是画布底面已经没有位置了不需要UI再往下刷新了 跳出去if (itemRectDic.ContainsKey(bestValue.mDRect.itemIndex + i + scrollColumn)){//当往下显示的时候将上边隐藏部位的格子释放掉waitChangeList[i].mDRect.isUse = false;//查询到左下角的首元素加上列数个单位之后 正好是下一行的位置waitChangeList[i].mDRect = itemRectDic[bestValue.mDRect.itemIndex + i + scrollColumn];waitChangeList[i].Execute_PlacePos();//标记新的占用位置waitChangeList[i].mDRect.isUse = true;}}}else{                                                                     for (int i = scrollColumn; i > 0 ; i--){//Debug.Log("获取的值"+(bestValue.mDRect.itemIndex - i));//当再次刷新出现越界的时候    就是画布底面已经没有位置了不需要UI再往下刷新了 跳出去if (itemRectDic.ContainsKey(bestValue.mDRect.itemIndex - i)){//Debug.Log("拾取格子"+(bestValue.mDRect.itemIndex - i));//当往下显示的时候将上边隐藏部位的格子释放掉waitChangeList[scrollColumn -i].mDRect.isUse = false;//查询到左下角的首元素加上列数个单位之后 正好是下一行的位置waitChangeList[scrollColumn - i].mDRect = itemRectDic[bestValue.mDRect.itemIndex -i];waitChangeList[scrollColumn - i].Execute_PlacePos();//标记新的占用位置waitChangeList[scrollColumn - i].mDRect.isUse = true;}}}//改完格子清理表waitChangeList.Clear();}//TODO fix/// <summary>/// 检测元素是否越界 目前的策略 用每排第一个元素进行Y轴判断移动位置/// 所有的元素位置都保存在字典里 找出越界的位置的刷新那一排的位置/// 判断元素向上越界还是向下越界/// </summary>/// <returns></returns>private Transform CheckCrossTheBorder(bool isDown){//Debug.Log("我传入的值 : " + isDown);var tmpMaxItem = GetBestValueItem(isDown);//Debug.Log(tmpMaxItem.position.y+"     " + mDisplayRect.position.y);if(isDown)return tmpMaxItem.position.y > mDisplayRect.position.y ? tmpMaxItem : null;float pageBottom = mDisplayRect.position.y - mDisplayRect.sizeDelta.y;//Debug.Log("查询最小的位置 : "+pageBottom +"                     "+ mDisplayRect.position.y);return tmpMaxItem.position.y < pageBottom ? tmpMaxItem : null;}//查看当前的滑动方向private float previousPagePos;private bool? isSlideDown;// 当isSlideDown为空是表明当前无操作public bool? IsSlideDown { get => isSlideDown;}/// <summary>/// 查看当前滑动的方向 如果页面向上滑动那么Y轴是增加的 反之下滑  如果为空那么就是未参与滑动操作/// </summary>/// <returns></returns>private void CheckCurDirection() {if (transform.position.y == previousPagePos) {isSlideDown = null;return;}isSlideDown = transform.position.y < previousPagePos;previousPagePos = transform.position.y;}private void Update(){CheckCurDirection();if (isSlideDown == null)return;bool isTrue = (bool)isSlideDown;var changeItem = CheckCrossTheBorder(!isTrue);if (changeItem != null)ExecuteChangeLocation(changeItem, !isTrue);//TODO FIX 这里需要严重优化 暂时没考虑好具体方法if (!isTrue) {//Debug.Log("内容框底部点 ： "+(transform.position.y-(transform as RectTransform).sizeDelta.y));//Debug.Log("显示框底部点 : "+(mDisplayRect.position.y-(mDisplayRect as RectTransform).sizeDelta.y));var contentPos = (transform.position.y - (transform as RectTransform).sizeDelta.y);var displayPos = (mDisplayRect.position.y - (mDisplayRect as RectTransform).sizeDelta.y);//TODO FIX 临时测试代码if (contentPos - displayPos > 80) {if (isLoad) {transform.parent.parent.GetChild(1).GetComponent<loadState>().SetLoadBar(true);StartCoroutine(LoadItem(20));isLoad = false;}}}}//-----------------------------------------加载模块拓展----------------------------------------private bool isLoad =true;//是否结束异步等待public bool isAsyncWait = true;private IEnumerator LoadItem(int count){while (isAsyncWait){yield return new WaitForSeconds(0.3f);}//TODO FIX 测试用AddItemPosition(count);if (allItemCount > 80)isLoad = false;isAsyncWait = true;}//TODO FIX 测试用}internal static class ExetenceMethod_YC
{//允许三个单位的误差public static bool Comparer_Position_Y(this Transform my,Vector3 other){if (my.position.y > other.y - 3 && my.position.y < other.y + 3)return true;return false;}public static void TryValueGet<TKey,TValue>(this Dictionary<TKey, TValue> my, TKey key, out TValue value) {if (!my.ContainsKey(key)) {Debug.LogError("键为空检测触发处 : Key = "+key);value = default(TValue);return;}my.TryGetValue(key,out value);}public static void SortAdd<T>(this IList<T> list,T TObj,bool isDescending = false) {if (typeof(T) == typeof(ItemPropoty)) {if (list.Count == 0){list.Add(TObj);return;}int insertIndex = isDescending ? 0 : list.Count;if ((TObj as ItemPropoty).mDRect.itemIndex < (list[0] as ItemPropoty).mDRect.itemIndex){list.Insert(list.Count - insertIndex, TObj);}else {list.Insert(insertIndex, TObj);}}}//关于处理间距的问题 计算时存再行列的数量误差 去掉最后一排的间距再进行计算 /*----------------------------------------问题清单------------------------------------------------1,快速拖拽会发生丢失UI现象2,计算行列自动布局显示半个UI的优化3,拓展加载模块功能4,优化下拉判断选项*/
}

using System.Collections;
using System.Collections.Generic;
using System.Text;
using UnityEngine;
using UnityEngine.UI;public class loadState : MonoBehaviour
{public Text[] dot;public bool isLoading;public CustomScroll cs;private float nxtTime = 0;public void SetDot(){}public void SetLoadBar(bool isTrue){isLoading = isTrue;gameObject.SetActive(true);StartCoroutine(Recover());}public void BarFadeAway(){}private int index=0;public void whirl() {index++;index %= dot.Length;StartCoroutine(Bright());}private IEnumerator Bright() {dot[index].gameObject.SetActive(false);yield return new WaitForSeconds(0.18f);dot[index].gameObject.SetActive(true);}private IEnumerator Recover(){yield return new WaitForSeconds(2);cs.isAsyncWait = false;gameObject.SetActive(false);isLoading = false;}void Update(){if (isLoading){nxtTime += Time.deltaTime;if (nxtTime >= 0.2f) {whirl();nxtTime = 0;}}}
}