參考連接:https://blog.csdn.net/weixin_41814169/article/details/88890650
今天做一個滑動翻頁效果良蛮,便用上面連接的輪子做滑動翻頁效果苍柏,但是這個滑動翻頁效果只支持滑動千劈,不支持設(shè)置index之后滑動過去鳞尔,故做了修改以支持idnex滑動翻頁效果~
順便記錄一下~
注意:
SetIndexMove(int index) 這個方法便是設(shè)置index滑動
using UnityEngine;
using System.Collections;
using UnityEngine.UI;
using System.Collections.Generic;
using UnityEngine.EventSystems;
using System;
public class PageView : MonoBehaviour, IBeginDragHandler, IEndDragHandler
{
ScrollRect rect; //滑動組件
//public ScrollRect rect2; //滑動組件2
private float targethorizontal = 0; //滑動的起始坐標
private bool isDrag = false; //是否拖拽結(jié)束
private List<float> posList = new List<float>();//求出每頁的臨界角,頁索引從0開始
private int currentPageIndex = -1;
public Action<int> OnPageChanged;
private bool stopMove = true;
public float smooting = 4; //滑動速度
public float sensitivity = 0;
private float startTime;
private float startDragHorizontal;
bool isInit = false;
public void Init()
{
// rect = rect2;
rect = transform.GetComponent<ScrollRect>();
// rect2 = transform.GetComponent<ScrollRect>();
float horizontalLength = rect.content.rect.width - GetComponent<RectTransform>().rect.width;
//float horizontalLength2 = rect2.content.rect.width - GetComponent<RectTransform>().rect.width;
posList.Add(0);
for (int i = 1; i < rect.content.transform.childCount - 1; i++)
{
posList.Add(GetComponent<RectTransform>().rect.width * i / horizontalLength);
}
posList.Add(1);
isInit = true;
}
void Update()
{
if (isInit)
{
if (!isDrag && !stopMove)
{
startTime += Time.deltaTime;
float t = startTime * smooting;
rect.horizontalNormalizedPosition = Mathf.Lerp(rect.horizontalNormalizedPosition, targethorizontal, t);
// rect2.horizontalNormalizedPosition = Mathf.Lerp(rect2.horizontalNormalizedPosition, targethorizontal, t);
if (t >= 1)
stopMove = true;
}
}
}
public void pageTo(int index)
{
if (!isInit) return;
if (index >= 0 && index < posList.Count)
{
rect.horizontalNormalizedPosition = posList[index];
SetPageIndex(index);
}
else
{
Debug.LogWarning("頁碼不存在");
}
}
private void SetPageIndex(int index)
{
if (!isInit) return;
if (currentPageIndex != index)
{
currentPageIndex = index;
if (OnPageChanged != null)
OnPageChanged(index);
}
}
public void OnBeginDrag(PointerEventData eventData)
{
if (!isInit) return;
isDrag = true;
startDragHorizontal = rect.horizontalNormalizedPosition;
// startDragHorizontal = rect2.horizontalNormalizedPosition;
}
public void OnEndDrag(PointerEventData eventData)
{
if (!isInit) return;
float posX = rect.horizontalNormalizedPosition;
posX += ((posX - startDragHorizontal) * sensitivity);
posX = posX < 1 ? posX : 1;
posX = posX > 0 ? posX : 0;
int index = 0;
float offset = Mathf.Abs(posList[index] - posX);
for (int i = 1; i < posList.Count; i++)
{
float temp = Mathf.Abs(posList[i] - posX);
if (temp < offset)
{
index = i;
offset = temp;
}
}
SetPageIndex(index);
targethorizontal = posList[index]; //設(shè)置當前坐標,更新函數(shù)進行插值
isDrag = false;
startTime = 0;
stopMove = false;
}
public void SetIndexMove(int index)
{
if (index < 0)
{
index = index < 0 ? posList.Count - 1 : index;
}
else if (index >= posList.Count)
{
index = index >= posList.Count ? 0 : index;
}
SetPageIndex(index);
targethorizontal = posList[index]; //設(shè)置當前坐標,更新函數(shù)進行插值
startTime = 0;
stopMove = false;
}
}