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 posList = new List();            //求出每页的临界角，页索引从0开始 
    private int currentPageIndex = -1;
    public Action 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();
        var _rectWidth = GetComponent();
        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();
        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;
    }
}

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