参考：用两种简单的方式实现unity的分页效果

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
using UnityEngine.Rendering.VirtualTexturing;
using UnityEngine.TerrainUtils;

public class PageController : MonoBehaviour
{
    private List<int> items;

    /// <summary>
    /// 总数据数量
    /// </summary>
    private int ItemsCount;

    /// <summary>
    /// 总页数，没有数据默认为1
    /// </summary>
    private int PageCount = 1;

    /// <summary>
    /// 当前页数的标签
    /// </summary>
    private Text PanelText;

    /// <summary>
    /// 当前页面索引
    /// </summary>
    private int PageIndex = 1;

    /// <summary>
    /// 上一页按钮
    /// </summary>
    private Button BtnPrevious;

    /// <summary>
    /// 下一页按钮
    /// </summary>
    private Button BtnNext;

    /// <summary>
    /// 父物体组件，所有的子物体全部挂在这个上
    /// </summary>
    public GameObject ParentObj;

    /// <summary>
    /// 需要使用的预制件,该游戏物体上会绑定各种事件、资源等，同时也是子物体
    /// </summary>
    public GameObject gameObjectPrefab;

    public bool pressBtnPrevious = false;
    public bool pressBtnNext = false;
    
	// 填充进UpdateUI<T>的数据
    List<int> dataList = new List<int> { 1, 2, 3, 4, 5 ,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22};
    List<string> dataList2 = new List<string> { "a", "b", "c", "d", "e", 
                                                "a2", "b2", "c2", "d2", "e2", 
                                                "a3", "b3", "c3", "d3", "e3",
                                                 "a4", "b4", "c4", "d4", "e4" };



    void Start()
    {
        InitUGUI();
        Init(dataList2);
    }

    /// <summary>
    /// 初始化UGUI
    /// </summary>
    private void InitUGUI()
    {
        BtnNext = GameObject.Find("Canvas/BtnNext").GetComponent<Button>(); // 下一页按钮

        BtnPrevious = GameObject.Find("Canvas/BtnPrevious").GetComponent<Button>(); // 上一页按钮
        
        PanelText = GameObject.Find("Canvas/PanelText").GetComponent<Text>(); // 页码文本
        
        gameObjectPrefab = (GameObject)Resources.Load("Test/data"); // 预制体

        //为上一页按钮与下一页按钮添加事件
        BtnNext.onClick.AddListener(() => { Next(); });
        BtnPrevious.onClick.AddListener(() => { Previous(); });
    }

    /// <summary>
    /// 下一页事件
    /// </summary>
    private void Next()
    {
        pressBtnNext = true;
        //最后一页禁止翻页
        if (PageIndex == PageCount)
            return;

        if (PageIndex >= PageCount)
            PageIndex = PageCount;

        DestroyChildObject(ParentObj);  // 删除所有子对象
        //DestroyOneChildObj(ParentObj);  // 按BtnNext删除最左边的子对象
        PageIndex += 1;
        UpdateUI(PageIndex, dataList2);

        //更新页面页数
        PanelText.text = string.Format("{0}/{1}", PageIndex.ToString(), PageCount.ToString());

        pressBtnNext = false;
    }

    private void Previous()
    {
        pressBtnPrevious = true;

        //第一页禁止翻页
        if (PageIndex == 1)
            return;

        DestroyChildObject(ParentObj);  // 删除所有子对象
        //DestroyOneChildObj(ParentObj);  // 按BtnPrevious删除最右边的子对象

        PageIndex -= 1;

        UpdateUI(PageIndex, dataList2);

        //更新页面页数
        PanelText.text = string.Format("{0}/{1}", PageIndex.ToString(), PageCount.ToString());

        pressBtnPrevious = false;
    }

    /// <summary>
    /// 初始化元素
    /// </summary>
    private void Init<T>(List<T> datas)
    {
        //计算元素总个数        
        items = new List<int>();
        for (int i = 0; i < 20; i++)
        {
            var index = Random.Range(1, 4);
            items.Add(index);
        }
        ItemsCount = items.Count;

        //计算总页数
        PageCount = items.Count % 4 == 0 ? items.Count / 4 : items.Count / 4 + 1;
        if (items.Count <= 4)
            PageCount = 1;

        PageIndex = 1;
        //调用绑定页数方法
        //UpdateUI(PageIndex);
        //datas - >当前页码的_datas
        List<T>_datas = new List<T>();
        //UpdateUI(PageIndex, _datas);
        UpdateUI(PageIndex, dataList2);
        //更新界面页数
        PanelText.text = string.Format("{0}/{1}", PageIndex.ToString(), PageCount.ToString());
    }

    /// <summary>
    /// 绑定页数方法
    /// </summary>
    /// <param name="当前页码"></param>
    private void UpdateUI<T>(int currentIndex,List<T> data)
    {
        //没有数据则直接return
        if (ItemsCount <= 0)
        {
            return;
        }

        for (int i = (PageIndex - 1) * 4; i < ((PageIndex - 1) * 4 + 4 > ItemsCount ? ItemsCount : (PageIndex - 1) * 4 + 4); i++)
        {

            var needGameObject = Instantiate(gameObjectPrefab) as GameObject;
            needGameObject.transform.SetParent(ParentObj.transform);

            Text dataText = needGameObject.transform.Find("DataText").GetComponent<Text>();
            dataText.text = data[i].ToString();




            //needGameObject.GetComponent<Image>().sprite = LoadSprite(items[i].ToString());
        }
    }

    /// <summary>
    /// 删除对象下的子对象
    /// </summary>
    /// <param name="父物体"></param>
    public void DestroyChildObject(GameObject parentObject)
    {
        if (parentObject == null)
            return;
        for (int i = parentObject.transform.childCount - 1; i >= 0; i--)
        {
            Destroy(parentObject.transform.GetChild(i).gameObject);
        }
        Resources.UnloadUnusedAssets(); //释放未使用资源
    }

    /// <summary>
    /// 删除对象下的一个子对象（如果按BtnNext就是删除最左边的子对象，按BtnPrevious就是删除最右边的子对象）
    /// </summary>
    /// <param name="parentObject"></param>
    public void DestroyOneChildObj(GameObject parentObject)
    {
        if (parentObject == null)
            return;

        if(pressBtnNext)
        {
            Destroy(parentObject.transform.GetChild(0).gameObject);//删除最左边的子对象
        }else if(pressBtnPrevious)
        {
            Destroy(parentObject.transform.GetChild(parentObject.transform.childCount - 1).gameObject);//删除最右边的子对象
        }

        Resources.UnloadUnusedAssets(); //释放未使用资源
    }





    private Sprite LoadSprite(string assetName)
    {
        Texture texture = (Texture)Resources.Load("Textures/" + assetName);
        Sprite sprite = Sprite.Create((Texture2D)texture, new Rect(0, 0, texture.width, texture.height), new Vector2(0.5f, 0.5f));
        return sprite;
    }
}