Unity UGUI实现滑动翻页直接跳转页数

本文实例为大家分享了Unity UGUI实现滑动翻页，直接跳转页数的具体代码，供大家参考，具体内容如下

首先看一下最终效果

其实这个功能基本上是老生常谈了，所以代码还是很简单

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

public class PageView : MonoBehaviour, IBeginDragHandler, IEndDragHandler
{

private ScrollRect rect;            //滑动组件
private float targethorizontal = 0;       //滑动的起始坐标
private bool isDrag = false;          //是否拖拽结束
private List<float> posList = new List<float>();      //求出每页的临界角，页索引从0开始
private int currentPageIndex = -1;
public Action<int> OnPageChanged;
public RectTransform content;
private bool stopMove = true;
public float smooting = 4;   //滑动速度
public float sensitivity = 0;
private float startTime;

private float startDragHorizontal;
public Transform toggleList;

void Start()
{
rect = transform.GetComponent<ScrollRect>();
var _rectWidth = GetComponent<RectTransform>();
var tempWidth = ((float)content.transform.childCount * _rectWidth.rect.width);
content.sizeDelta = new Vector2(tempWidth, _rectWidth.rect.height);
//未显示的长度
float horizontalLength = content.rect.width - _rectWidth.rect.width;
for (int i = 0; i < rect.content.transform.childCount; i++)
{
posList.Add(_rectWidth.rect.width * i / horizontalLength);
}
}

void Update()
{
if (!isDrag && !stopMove)
{
startTime += Time.deltaTime;
float t = startTime * smooting;
rect.horizontalNormalizedPosition = Mathf.Lerp(rect.horizontalNormalizedPosition, targethorizontal, t);
if (t >= 1)
stopMove = true;
}
//Debug.Log(rect.horizontalNormalizedPosition);
}

public void pageTo(int index)
{
if (index >= 0 && index < posList.Count)
{
rect.horizontalNormalizedPosition = posList[index];
SetPageIndex(index);
GetIndex(index);
}
}
private void SetPageIndex(int index)
{
if (currentPageIndex != index)
{
currentPageIndex = index;
if (OnPageChanged != null)
OnPageChanged(index);
}
}

public void OnBeginDrag(PointerEventData eventData)
{
isDrag = true;
//开始拖动
startDragHorizontal = rect.horizontalNormalizedPosition;
}

public void OnEndDrag(PointerEventData eventData)
{
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);
//Debug.Log("offset " + offset);

for (int i = 1; i < posList.Count; i++)
{
float temp = Mathf.Abs(posList[i] - posX);
//Debug.Log("temp " + temp);
//Debug.Log("i" + i);
if (temp < offset)
{
index = i;
offset = temp;
}
//Debug.Log("index " + index);
}
//Debug.Log(index);
SetPageIndex(index);
GetIndex(index);
targethorizontal = posList[index]; //设置当前坐标，更新函数进行插值
isDrag = false;
startTime = 0;
stopMove = false;

}

public void GetIndex(int index)
{
var toogle = toggleList.GetChild(index).GetComponent<Toggle>();
toogle.isOn = true;
}
}

using UnityEngine;
using System.Collections;
using UnityEngine.UI;
using System;

public class GameController : MonoBehaviour {
[SerializeField]
private Text pageNumber;
[SerializeField]
private InputField inputField;
[SerializeField]
private PageView pageView;
// Use this for initialization
void Start () {
pageNumber.text = string.Format ("当前页码：0");
pageView.OnPageChanged = pageChanged;
}

void pageChanged (int index) {
pageNumber.text = string.Format ("当前页码：{0}" , index.ToString ());
}

public void onClick () {
try {
int idnex = int.Parse (inputField.text);
pageView.pageTo (idnex);
} catch(Exception ex) {
Debug.LogWarning ("请输入数字"+ex.ToString());
}
}

void Destroy () {
pageView.OnPageChanged = null;
}
}

附上项目：地址

以上就是本文的全部内容，希望对大家的学习有所帮助

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