unity实现翻页按钮功能

 using System.Collections; using System.Collections.Generic; using UnityEngine; using UnityEngine.Events; using UnityEngine.UI; /// 
 /// 分页按钮面板控制器 /// 
 public class PageBtnPanelC : MonoBehaviour { private HorizontalLayoutGroup self_HLG; /// 
 /// 上一页按钮 /// 
 private Button lastPageBtn; /// 
 /// 下一页按钮 /// 
 private Button nextPageBtn; /// 
 /// 页数的父物体 /// 
 private RectTransform pageBtnParent; private HorizontalLayoutGroup pageBtnParent_HLG; /// 
 /// 上一页按钮点击事件 /// 
 private UnityAction lastPageBtnEvent; /// 
 /// 下一页按钮点击事件 /// 
 private UnityAction nextPageBtnEvent; /// 
 /// 当前显示页面的下标 /// 
 private int _currentShowPageIndex = 1; public int CurrentShowPageIndex { get { return _currentShowPageIndex; } set { _currentShowPageIndex = value; } } /// 
 /// 总的页面数 /// 
 private int totalPageNumber = 0; /// 
 /// 显示按钮的个数 奇数个 /// 
 [Header("必须是奇数个，且小于总页数")] private int _showBtnCount = 5; public int ShowBtnCount { get { if (_showBtnCount > totalPageNumber) { _showBtnCount = totalPageNumber; } return _showBtnCount; } set { if (value % 2 == 0) { _showBtnCount = value - 1; } else { _showBtnCount = value; } } } /// 
 /// 页数按钮 预设体 /// 
 public GameObject btnPrefabs; /// 
 /// 页数按钮 存放list /// 
 public List pbcList; private void Start() { Init(); Set(14, 9, (index1) => { Debug.Log("当前显示第：" + CurrentShowPageIndex + "页"); }, (index2) => { Debug.Log("当前显示第：" + CurrentShowPageIndex + "页"); }, (_pageIndex, _pbc) => { Debug.Log("当前显示第：" + CurrentShowPageIndex + "页"); }); } /// 
 /// 改变显示的状态 /// 
 void ChangeShowState() { int _showBtnCount = ShowBtnCount; /* 判断是否在可更新范围内,如果在更新范围内，则将CurrentShowPageIndex设置为中心位置的按钮 eg:假设总共有10页(totalPageNumber = 10)，显示按钮的个数为7（ShowBtnCount = 7） 则应该在 (ShowBtnCount / 2 + 1) = 4 到 totalPageNumber - ShowBtnCount / 2 = 7 之间设置 如果CurrentShowPageIndex = 5或6 则应该这样显示  1.. 3 4 5 6 7 ..10 如果不在更新范围内， 如果CurrentShowPageIndex = 1或2或3或4  则应该这样显示： 1 2 3 4 5 6 ..10 如果如果CurrentShowPageIndex = 7或8或9或10 则应该这样显示 1.. 5 6 7 8 9 10 */ if (CurrentShowPageIndex >= (ShowBtnCount / 2 + 1) && CurrentShowPageIndex <= (totalPageNumber - ShowBtnCount / 2)) { int _showBtnCount2 = _showBtnCount - 2; _showBtnCount2 /= 2; //判断起始下标 int startIndex = CurrentShowPageIndex - _showBtnCount2; int endIndex = CurrentShowPageIndex + _showBtnCount2; //防止超出 if (startIndex <= 1) { startIndex = 2; } //防止超出 if (endIndex >= totalPageNumber) { endIndex = totalPageNumber - 1; } //计算中心位置按钮的下标 因为showBtnCount不定 int centerIndex = ShowBtnCount / 2; pbcList[centerIndex].Set(CurrentShowPageIndex); //循环设置前面一部分按钮信息 for (int i = 1; i  (totalPageNumber - ShowBtnCount / 2)) { int startNumber = totalPageNumber - ShowBtnCount + 2; for (int i = 1; i  ShowBtnCount){ _showBtnCount -= 2; _showBtnCount /= 2; if (CurrentShowPageIndex - _showBtnCount - 1 > 1) { pbcList[0].Set(1, "1.."); } else { pbcList[0].Set(1); } if (CurrentShowPageIndex + _showBtnCount + 1 (); self_HLG = transform.GetComponent(); pageBtnParent = transform.Find("PageIndexParent") as RectTransform; pageBtnParent_HLG = pageBtnParent.GetComponent(); lastPageBtn = transform.Find("LastPageBtn").GetComponent(); lastPageBtn.onClick.AddListener(()=> { if (totalPageNumber <= 0) return; if (CurrentShowPageIndex > 1) { CurrentShowPageIndex--; } ResetPageBtnState(); ChangeShowState(); PageBtnC pbc = GetPBCFromIndex(CurrentShowPageIndex); if (pbc != null) { pbc.SetHighlightColor(); } if (lastPageBtnEvent != null) { lastPageBtnEvent(CurrentShowPageIndex); } }); nextPageBtn = transform.Find("NextPageBtn").GetComponent(); nextPageBtn.onClick.AddListener(()=> { if (totalPageNumber <= 0) return; if (CurrentShowPageIndex  /// 设置信息 ///  /// 总页数 /// 显示多少个按钮，填奇数，如果填偶数，则会强制减1，如：填6，则实际为5 /// 上一页按钮事件 /// 下一页按钮事件 /// 单独点击页面按钮事件 public void Set(int totalPageNumber,int showBtnCount,UnityAction lastBtnEvent,UnityAction nextBtnEvent,UnityAction pageBtnClickEvent) { if (totalPageNumber <= 0) { this.totalPageNumber = 1; } else { this.totalPageNumber = totalPageNumber; } this.ShowBtnCount = showBtnCount; this.lastPageBtnEvent = lastBtnEvent; this.nextPageBtnEvent = nextBtnEvent; CurrentShowPageIndex = 1; pbcList.Clear(); for (int i = 1; i <= ShowBtnCount; i++) { int index = i; PageBtnC pbc = PoolManager.Instance.Spawn(btnPrefabs, pageBtnParent).GetComponent(); if (pbc) { pbc.Set(index,null, (pageIndex,pbc111) => { CurrentShowPageIndex = pageIndex; ResetPageBtnState(); ChangeShowState(); PageBtnC pbc1 = GetPBCFromIndex(CurrentShowPageIndex); if (pbc1 != null) { pbc1.SetHighlightColor(); } if (pageBtnClickEvent != null) { pageBtnClickEvent(pageIndex, pbc111); } }); } pbcList.Add(pbc); } pbcList[0].SetHighlightColor(); ChangeShowState(); Util.SetWidth_ChildWidthSame(pageBtnParent_HLG, pageBtnParent); Util.SetWidth_ChildWidthNotSame(self_HLG, transform as RectTransform); } /// 
 /// 重置所有按钮的状态 /// 
 void ResetPageBtnState() { for (int i = 0; i  /// 回收所有页码 ///  public void Unspawn() { for (int i = pageBtnParent.childCount - 1; i >= 0; i--) { PoolManager.Instance.UnSpawn(pageBtnParent.GetChild(i).gameObject); } } public void Clear() { lastPageBtnEvent = null; nextPageBtnEvent = null; } /// 
 /// 根据index得到pagebtnc物体 /// 
 ///  ///  PageBtnC GetPBCFromIndex(int index) { for (int i = 0; i  /// 设置物体宽度 子物体宽度相同 ///  ///  ///  ///  public static void SetWidth_ChildWidthSame(HorizontalLayoutGroup parentHLG, RectTransform parent, UnityAction endCallBack = null) { float width = 0; float leftPadding = parentHLG.padding.left; float spacing = parentHLG.spacing; int childCount = parent.childCount; if (childCount > 0) { RectTransform singleChildRT = parent.GetChild(0) as RectTransform; width = childCount * singleChildRT.rect.width + (childCount - 1) * spacing + leftPadding; } parent.sizeDelta = new Vector2(width, parent.sizeDelta.y); if (endCallBack != null) { endCallBack(width); } } /// 
 /// 设置物体宽度 子物体宽度不同 /// 
 ///  ///  ///  public static void SetWidth_ChildWidthNotSame(HorizontalLayoutGroup parentHLG, RectTransform parent, UnityAction endCallBack = null) { float width = 0; RectOffset Padding = parentHLG.padding; float spacing = parentHLG.spacing; int childCount = parent.childCount; if (childCount > 0) { for (int i = 0; i 

 using System.Collections; using System.Collections.Generic; using UnityEngine; using UnityEngine.Events; using UnityEngine.UI; /// 
 /// 页码按钮控制器 /// 
 public class PageBtnC : MonoBehaviour,IPool { /// 
 /// 自己显示的页码 /// 
 private int currentPageIndex = 0; public int CurrentPageIndex { get { return currentPageIndex; } } private Button SelfBtn; private Image img; private Text selfText; /// 
 /// 按钮事件 /// 
 public UnityAction btnClickEvent; /// 
 /// 按钮正常和高亮颜色 /// 
 public Color normalColor; public Color highlightColor; /// 
 /// 文本正常和高亮颜色 /// 
 public Color normalTextColor; public Color highlightTextColor; private bool isInit = false; void Init() { if (isInit) return; isInit = true; img = transform.GetComponent(); selfText = transform.Find("Text").GetComponent(); SelfBtn = transform.GetComponent(); SelfBtn.onClick.AddListener(()=> { if (btnClickEvent != null) { btnClickEvent(currentPageIndex,this); } }); } /// 
 /// 设置正常颜色 /// 
 public void SetNormalColor() { img.color = normalColor; selfText.color = normalTextColor; } /// 
 /// 设置高亮颜色 /// 
 public void SetHighlightColor() { img.color = highlightColor; selfText.color = highlightTextColor; } /// 
 /// 设置事件 文本内容等 /// 
 ///  ///  ///  public void Set(int currentPageIndex,string selfTextStr = null,UnityAction btnClickEvent = null) { this.currentPageIndex = currentPageIndex; if (btnClickEvent != null) { this.btnClickEvent = btnClickEvent; } if (string.IsNullOrEmpty(selfTextStr)) { selfText.text = currentPageIndex.ToString(); } else { selfText.text = selfTextStr; } } #region 对象池接口方法 public int GetMaxCount() { return 10; } public string SingletonName() { return this.GetType().Name; } public void Spawn() { Init(); } public void UnSpawn() { SetNormalColor(); } #endregion }