Unity使用ScrollRect制作翻页

本文实例为大家分享了使用ScrollRect制作翻页的具体代码，供大家参考，具体内容如下

1.标准的层级结构 ScrollRect->ViewPort->Content，Viewport负责显示区域的大小一般和Mask一起配合使用，Content使用Layout来布局，如果想使用代码来自动定位显示位置需要在Content加上Content size filter.

2.ScrollRectHelper

using UnityEngine;
using UnityEngine.UI;
using UnityEngine.EventSystems;
using System.Collections.Generic;
using System;

public class ScrollRectHelper : MonoBehaviour, IBeginDragHandler, IEndDragHandler
{
 // 滑动速度
 public float smooting = 5;

// 每页显示的项目
 [SerializeField]
 private int countPerPage = 10;

ScrollRect srect;
 // 总页数
 float totalPages;
 // 是否拖拽结束
 bool isDrag = false;
 // 总页数索引比列 0-1
 List<float> listPageValue = new List<float> { 0 };
 // 滑动的目标位置
 public float targetPos = 0;
 // 当前位置索引
 float nowindex = 0;                

void Awake()
 {
   srect = GetComponent<ScrollRect>();
 }

public string PageText()
 {
   return (nowindex + 1) + "/" + (totalPages + 1);
 }

// 计算每页比例
 public void CalcListPageValue<T>() where T : MonoBehaviour
 {
   T[] items = srect.content.GetComponentsInChildren<T>();
   srect.content.rect.Set(srect.content.rect.width / 2, srect.content.rect.y, srect.content.rect.width, srect.content.rect.height);
   totalPages = (int)(Math.Ceiling((float)items.Length / countPerPage) - 1);
   if (items.Length != 0)
   {
     for (float i = 1; i <= totalPages; i++)
     {
       //Debug.Log(i / totalPages);
       listPageValue.Add((i / totalPages));
     }
   }
 }

void Update()
 {
   if (!isDrag)
   {
     srect.horizontalNormalizedPosition = Mathf.Lerp(srect.horizontalNormalizedPosition, targetPos,
       Time.deltaTime * smooting);
   }

// Debug
   if (Input.GetKeyDown(KeyCode.LeftArrow)) PressLeft();
   if (Input.GetKeyDown(KeyCode.RightArrow)) PressRight();
 }

/// <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 PressLeft()
 {
   nowindex = Mathf.Clamp(nowindex - 1, 0, totalPages);
   targetPos = listPageValue[Convert.ToInt32(nowindex)];
 }

public void PressRight()
 {
   nowindex = Mathf.Clamp(nowindex + 1, 0, totalPages);
   targetPos = listPageValue[Convert.ToInt32(nowindex)];
 }
}

来源：https://www.cnblogs.com/linxmouse/p/10239098.html