UGUI ScrollRect实现带按钮翻页支持拖拽

 using UnityEngine; using System.Collections; using UnityEngine.UI; using UnityEngine.EventSystems; using System.Collections.Generic; using System; /// 
 /// 略知CSharp /// 
 public class ScrollRectHelper : MonoBehaviour, IBeginDragHandler, IEndDragHandler { public float smooting = 5;    //滑动速度 public List 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 listPageValue = new List { 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(); 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); } /// 
 /// 拖动开始 /// 
 ///  public void OnBeginDrag(PointerEventData eventData) { isDrag = true; } /// 
 /// 拖拽结束 /// 
 ///  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