新建一个ScrollView，在Content上挂几个子节点，挂上PageView脚本即可
注：PageView会自动对Content下的节点进行大小整理，每一个子节点都会和Viewport窗口大小一致
C#:
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.EventSystems;
using UnityEngine.UI;public class PageView : MonoBehaviour, IBeginDragHandler, IEndDragHandler
{[SerializeField]private bool _interactable = true;public bool interactable{get { return _interactable; }set{_interactable = value;if (m_ScrollRect != null) m_ScrollRect.horizontal = interactable;}}[Tooltip("页面移动速率")]public float smooting = 5f;[Tooltip("划过多少就算成功")][Range(0.1f, 1f)]public float limit = 0.3f;public bool autoPlay = false;public float autoPlaySeconds = 5f;//本游戏对象上的ScrollRect组件private ScrollRect m_ScrollRect;private int totalPage = 0; //当前已创建的页面数量private int selectPage = 0; //当前选中的页面private bool isDrag = false; //当前是否正在拖拽private float targetHorizontalPosition; //当前目标水平位置private Vector2 rectSize = Vector2.zero; //窗口大小void Awake(){m_ScrollRect = GetComponent<ScrollRect>();if (m_ScrollRect == null || !m_ScrollRect.enabled){Debug.LogWarning("PageView Component Need Activity ScrollRect !");enabled = false;return;}//ScrollRect初始化设置m_ScrollRect.movementType = ScrollRect.MovementType.Clamped;m_ScrollRect.vertical = false;m_ScrollRect.horizontal = _interactable;//重新给Content添加SizeFitter和Layout组件DestroyImmediate(m_ScrollRect.content.gameObject.GetComponent<ContentSizeFitter>());DestroyImmediate(m_ScrollRect.content.gameObject.GetComponent<HorizontalLayoutGroup>());var size_fitter = m_ScrollRect.content.gameObject.AddComponent<ContentSizeFitter>();var layout_group = m_ScrollRect.content.gameObject.AddComponent<HorizontalLayoutGroup>();layout_group.childControlHeight = true;layout_group.childForceExpandHeight = true;layout_group.childControlWidth = false;layout_group.childForceExpandWidth = false;layout_group.childAlignment = TextAnchor.MiddleLeft;size_fitter.horizontalFit = ContentSizeFitter.FitMode.PreferredSize;}// Update is called once per framefloat count = 0;void Update(){//检查是否有节点变动(只通过节点数量判定,如果手动改变了节点<数量不变>,需要手动调用以下方法)if (totalPage != m_ScrollRect.content.childCount){InitializationPage();}//没有拖拽时if (!isDrag && totalPage > 0){//m_ScrollRect.horizontalNormalizedPosition = Mathf.Lerp(m_ScrollRect.horizontalNormalizedPosition, targetHorizontal, Time.deltaTime * smooting);m_ScrollRect.content.localPosition = new Vector3(Mathf.Lerp(m_ScrollRect.content.localPosition.x, targetHorizontalPosition, Time.deltaTime * smooting), 0, 0);}//自动播放if (autoPlay && totalPage > 0){if (!isDrag){count += Time.deltaTime;if (count >= autoPlaySeconds){count = 0f;MoveLeft();}}else{count = 0f;}}}/// <summary>/// 如果手动改变了节点(数量不变),需要手动调用此方法 , 且不能有Active=false和非RectTransform的节点/// \n此方法只能在实例化出来第2帧后调用,否则可能获取不到窗口大小/// </summary>public void InitializationPage(){//获取窗口大小rectSize = m_ScrollRect.viewport.rect.size;if (rectSize.x == 0 || rectSize.y == 0) return;//初始化子节点foreach (RectTransform trf in m_ScrollRect.content){trf.gameObject.SetActive(true);trf.sizeDelta = rectSize;}totalPage = m_ScrollRect.content.childCount;Compute();//TODO回调方法}/// <summary>/// 向左移动,如果已经是最后一个,则循环到第一个/// </summary>public void MoveLeft(bool loop = true){selectPage += 1;if (loop && selectPage > totalPage) selectPage = 0;Compute();}/// <summary>/// 向右移动,如果已经是第一个,则循环到最后一个/// </summary>public void MoveRight(bool loop = true){selectPage -= 1;if (loop && selectPage < 0) selectPage = totalPage;Compute();}public void OnBeginDrag(PointerEventData eventData){//Debug.Log("Begin");isDrag = true;}public void OnEndDrag(PointerEventData eventData){//Debug.Log("End");isDrag = false;//窗口大小if (rectSize.x == 0 || rectSize.y == 0) return;//计算滑动结果var offsetWidth = -(selectPage - 1) * rectSize.x - m_ScrollRect.content.localPosition.x;//实际位置与预想位置差值if (Mathf.Abs(offsetWidth) > rectSize.x * limit){//向右滑动if (offsetWidth < 0){selectPage -= 1;}//向左滑动else{selectPage += 1;}Compute();}}//计算targetHorizontalPosition的值private void Compute(){//窗口大小if (rectSize.x == 0 || rectSize.y == 0) return;//计算值selectPage = totalPage <= 0 ? 0 : selectPage > totalPage ? totalPage : selectPage <= 0 ? 1 : selectPage;targetHorizontalPosition = -(selectPage - 1) * rectSize.x;}
}