UGUI ScrollRect 带按钮翻页支持拖拽

来源：互联网发布：mac拼音写切换编辑：程序博客网时间：2024/06/06 02:15
这里写图片描述
using System.Collections;  using UnityEngine.UI;  using UnityEngine.EventSystems;  using System.Collections.Generic;  using System;  /// <summary>  /// 略知CSharp http://blog.csdn.net/subsystemp  /// </summary>  public class ScrollRectHelper : MonoBehaviour, IBeginDragHandler, IEndDragHandler  {      public float smooting = 5;                          //滑动速度      public List<GameObject> listItem;                   //scrollview item       public int pageCount = 3;                           //每页显示的项目      ScrollRect srect;      float pageIndex;                                    //总页数      bool isDrag = false;                                //是否拖拽结束      List<float> listPageValue = new List<float> { 0 };  //总页数索引比列 0-1      float targetPos = 0;                                //滑动的目标位置      float nowindex = 0;                                 //当前位置索引      void Awake()      {          srect = GetComponent<ScrollRect>();          ListPageValueInit();      }      //每页比例      void ListPageValueInit()      {          pageIndex = (listItem.Count / pageCount)-1;          if (listItem != null && listItem.Count != 0)          {              for (float i = 1; i <= pageIndex; i++)              {                  listPageValue.Add((i / pageIndex));              }          }      }      void Update()      {          if (!isDrag)              srect.horizontalNormalizedPosition = Mathf.Lerp(srect.horizontalNormalizedPosition, targetPos, Time.deltaTime * smooting);      }      /// <summary>      /// 拖动开始      /// </summary>      /// <param name="eventData"></param>      public void OnBeginDrag(PointerEventData eventData)      {          isDrag = true;      }      /// <summary>      /// 拖拽结束      /// </summary>      /// <param name="eventData"></param>      public void OnEndDrag(PointerEventData eventData)      {          isDrag = false;          var tempPos = srect.horizontalNormalizedPosition; //获取拖动的值          var index = 0;          float offset = Mathf.Abs(listPageValue[index] - tempPos);    //拖动的绝对值          for (int i = 1; i < listPageValue.Count; i++)          {              float temp = Mathf.Abs(tempPos - listPageValue[i]);              if (temp < offset)              {                  index = i;                  offset = temp;              }          }          targetPos = listPageValue[index];          nowindex = index;      }      public void BtnLeftGo()      {          nowindex = Mathf.Clamp(nowindex - 1, 0, pageIndex);          targetPos = listPageValue[Convert.ToInt32(nowindex)];      }      public void BtnRightGo()      {          nowindex = Mathf.Clamp(nowindex + 1, 0, pageIndex);          targetPos = listPageValue[Convert.ToInt32(nowindex)];      }  }
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原文：http://blog.csdn.net/subsystemp/article/details/50608420
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