如何用Unity ScrollRect实现分页滚动翻页功能？

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原文示例为：本文实例为大家分享了Unity实现按页面码翻页效果的完整代码，供大家参考，具体内容如下：用来做背包+商店的按页面码翻页功能，先上图效果+其中，dragNum表示的是+例如为3，便是滑动距离超过

改写后：本文提供Unity实现分页翻页效果的代码示例，适用于背包和商店功能。效果展示如下，其中dragNum代表滑动阈值，如设为3，则滑动距离需超过3像素。

本文实例为大家分享了unity实现按页码翻页效果的具体代码，供大家参考，具体内容如下

用来做背包 商店的按页翻页功能，先上效果图

其中，dragNum 表示的是 如果为3，便是滑动距离超过当前页面宽度的百分之三十位成功

connect表示 scrollRect下connet的大小

然后是函数的初始化方法 这里提供了两个方法 一个是直接提供页数 参数分别代表 总页数，要显示的页数 以及切换到要显示的页数是否播放滑动动画

以及当时用来做背包、商店的方法2

和上面不用的是传入的是物品的数量以及每页显示格子数量的vector2 是否需要改变connect的大小 （需要提前把connect的大小设置为一页的大小）以及打开时显示的页数

思路大致如下 继承IBeginDragHandler, IEndDragHandler两个接口

在begin时将需要的两个参数 scrollNeedMove 以及scrollTargetValue 置位默认值

在end时计算

具体代码如下

using UnityEngine; using System.Collections; using UnityEngine.UI; using UnityEngine.EventSystems; public class ScrollPageTool : MonoBehaviour, IBeginDragHandler, IEndDragHandler { public Button pageLastButton; public Button pageNextButton; public Text pageNumText; public GridLayoutGroup itemConnect; [SerializeField] private bool buttonPageEnable; private int m_nowPage;//从0开始 private int m_pageCount; /// <summary> /// 滑动距离超过一页的 (m_dragNum*10)% 则滑动成功 /// </summary> public int m_dragNum; private float m_pageAreaSize; private const float SCROLL_SMOOTH_TIME = 0.2F; private const float SCROLL_MOVE_SPEED = 1F; private float scrollMoveSpeed = 0f; private bool scrollNeedMove = false; private float scrollTargetValue; public ScrollRect scrollRect; private bool isRegistEvent = false; public bool SetButtonStatus { set { buttonPageEnable = value; pageLastButton.interactable = buttonPageEnable && pageLastButton.interactable; pageNextButton.interactable = buttonPageEnable && pageNextButton.interactable; } } public void InitManager(int _allItemNum, Vector2 pageItemSize, bool isNeedChangeSize = true, int pageNum = 0,bool isShowAnim=false) { RegistEvent(); int _pageItemNum = (int)(pageItemSize.x * pageItemSize.y); m_pageCount = (_allItemNum / _pageItemNum) + ((_allItemNum % _pageItemNum == 0) ? 0 : 1); m_pageAreaSize = 1f / (m_pageCount - 1); ChangePage(pageNum); if (isNeedChangeSize) itemConnect.GetComponent<RectTransform>().sizeDelta = new Vector2((itemConnect.cellSize.x * pageItemSize.x + itemConnect.spacing.x * pageItemSize.x) * m_pageCount, itemConnect.padding.top + itemConnect.padding.bottom + itemConnect.cellSize.y * pageItemSize.y + (pageItemSize.y - 1) * itemConnect.spacing.y); } public void InitManager(int pageNum, int targetPage = 0, bool isShowAnim = false) { RegistEvent(); m_pageCount = pageNum; ChangePage(targetPage, isShowAnim); } private void RegistEvent() { if (isRegistEvent) return; isRegistEvent = true; if (pageLastButton != null) pageLastButton.onClick.AddListener(delegate { Paging(-1); }); if (pageNextButton != null) pageNextButton.onClick.AddListener(delegate { Paging(1); }); } private void Paging(int num) { //maxNum-1,从0开始 num = (num < 0) ? -1 : 1; int temp = Mathf.Clamp(m_nowPage + num, 0, m_pageCount - 1); if (m_nowPage == temp) return; ChangePage(temp); } void Update() { ScrollControl(); } public int GetPageNum { get { return m_nowPage; } } //按页翻动 private void ScrollControl() { if (!scrollNeedMove) return; if (Mathf.Abs(scrollRect.horizontalNormalizedPosition - scrollTargetValue) < 0.01f) { scrollRect.horizontalNormalizedPosition = scrollTargetValue; scrollNeedMove = false; return; } scrollRect.horizontalNormalizedPosition = Mathf.SmoothDamp(scrollRect.horizontalNormalizedPosition, scrollTargetValue, ref scrollMoveSpeed, SCROLL_SMOOTH_TIME); } public void OnBeginDrag(PointerEventData eventData) { scrollNeedMove = false; scrollTargetValue = 0; } public void OnEndDrag(PointerEventData eventData) { int tempPage = m_nowPage; int num=(((scrollRect.horizontalNormalizedPosition - (m_nowPage * m_pageAreaSize))>=0)?1:-1); if(Mathf.Abs(scrollRect.horizontalNormalizedPosition - (m_nowPage * m_pageAreaSize))>= (m_pageAreaSize / 10f) * m_dragNum) { tempPage+=num; } ChangePage(tempPage); } public void ChangePage(int pageNum, bool isShowAnim = true) { if (pageNum >= m_pageCount) pageNum = m_pageCount - 1; if (pageNum < 0) pageNum = 0; m_nowPage = pageNum; ChangePageText(pageNum); if (isShowAnim) { scrollTargetValue = m_nowPage * m_pageAreaSize; scrollNeedMove = true; scrollMoveSpeed = 0; } else { scrollRect.horizontalNormalizedPosition = m_nowPage * m_pageAreaSize; } ChangePageText(m_nowPage); } public void ChangePageText(int num) { int maxPageTo0Start = m_pageCount - 1; m_nowPage = Mathf.Clamp(num, 0, maxPageTo0Start); if (pageNumText != null) pageNumText.text = (m_nowPage + 1).ToString() + "/" + m_pageCount.ToString(); //only one page if (maxPageTo0Start == 0) { scrollRect.enabled = false; pageLastButton.interactable = false; pageNextButton.interactable = false; return; } else { pageLastButton.interactable = true; pageNextButton.interactable = true; scrollRect.enabled = true; } SetButtonStatus = buttonPageEnable; if (!buttonPageEnable) return; if (m_nowPage == 0 && pageLastButton.interactable) pageLastButton.interactable = false; if (m_nowPage >= maxPageTo0Start && pageNextButton.interactable) pageNextButton.interactable = false; if (m_nowPage > 0 && (!pageLastButton.interactable)) pageLastButton.interactable = true; if (m_nowPage < maxPageTo0Start && (!pageNextButton.interactable)) pageNextButton.interactable = true; } }

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