在Unity中实现分页数据显示和分页控制

参考：用两种简单的方式实现unity的分页效果

在这里插入图片描述

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_datasList<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returnif (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;}
}