unity3d之实现各种滑动效果

一、 点击滑动页面

新建了一个带mask的prefab，加上代码只需要将图片prefab、按钮prefab和所想添加的图片

拖进去会自动生成按钮，滑动速度可以随意调time，滑动效果用itween实现的，所以需要加上itween插件

效果如下：（图片是我最爱的马路小天使（¯﹃¯））

附上代码

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

 public class Mask : MonoBehaviour {

     public List<Sprite> sprite = new List<Sprite>();
     List<GameObject> image=new List<GameObject >();
     public GameObject pic;
     public Button but;
     public float time;
     float width, height;
     int num;
     void Start ()
     {
         num = sprite.Count;
          width = this.gameObject.GetComponent<RectTransform>().rect.width;
          height = this.gameObject.GetComponent<RectTransform>().rect.height;
          pic.transform.GetComponent<RectTransform>().sizeDelta=new Vector2(width,height);
          for (int i = ; i < num; i++)
          {

              GameObject p = Instantiate(pic,new Vector3(transform.position.x+i*width,transform.position.y,),transform.rotation)as GameObject;
              p.transform.parent = this.gameObject.transform;
              image.Add (p) ;
              p.GetComponent<Image>().sprite = sprite[i];
              Button b = Instantiate(but, new Vector3(transform.position.x- (  * num - ) / +*i, transform.position.y - height/ + , ), transform.rotation) as Button;
              b.transform.parent = GameObject.FindWithTag("Button").transform;
              System.Object obj = (System.Object)i;
              b.onClick.AddListener(delegate(){this.MoveToPic((int)obj);});
          }

     }
     void OnGUI()
     {
         if (GUI.Button(new Rect(transform.position.x +  + width / , Screen.height - transform.position.y - , , ), ">"))
         {
             if (image[].transform.position.x < transform.position.x-)
             {
                 Move();
             }
         }
         if (GUI.Button(new Rect(transform.position.x -width/-,Screen.height- transform.position.y- , , ), "<"))
         {
             if (image[num - ].transform.position.x > transform.position.x+)
             {
                 Move(-);
             }
         }
     }
     public void Move(int dir)
     {
         for (int i = ; i <num; i++)
         {
             iTween.MoveAdd(image[i], iTween.Hash("x", width * dir, "time", time));
         }
     }
     public void MoveToPic(int i)
     {

         float offset = transform.position.x - image[i].transform.position.x;
         for (int j = ; j < num; j++)
         {
             iTween.MoveAdd(image[j], iTween.Hash("x", offset, "time", time));
         }
     }

 }

二、间隔时间自动滑动，也可点击滑动

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

 public class ScrollPage : MonoBehaviour, IBeginDragHandler, IEndDragHandler
 {
     ScrollRect rect;
     //页面：0，1，2，3  索引从0开始
     //每页占的比列：0/3=0  1/3=0.333  2/3=0.6666 3/3=1
     //float[] pages = { 0f, 0.333f, 0.6666f, 1f };
     List<float> pages = new List<float>();
     int currentPageIndex = -;

     //滑动速度
     public float smooting = ;

     //滑动的起始坐标
     float targethorizontal = ;

     //是否拖拽结束 0 -结束 1-拖拽中 2-结束超过5s
     int isDrag = ;
     int curindex = ;
     int dir = ;
     float timecount = ;
     /// <summary>
     /// 用于返回一个页码，-1说明page的数据为0
     /// </summary>
     public System.Action<int,int> OnPageChanged;

     float startime = 0f;
     float delay = 0.1f;

     // Use this for initialization
     void Start()
     {
         rect = transform.GetComponent<ScrollRect>();
         //rect.horizontalNormalizedPosition = 0;
         //UpdatePages();
         startime = Time.time;
     }

     void Update()
     {
         if (Time.time < startime + delay) return;
         UpdatePages();
         //如果不判断。当在拖拽的时候要也会执行插值，所以会出现闪烁的效果
         //这里只要在拖动结束的时候。在进行插值
         if (isDrag ==  && pages.Count > )
         {
             rect.horizontalNormalizedPosition = Mathf.Lerp(rect.horizontalNormalizedPosition, targethorizontal, Time.deltaTime * smooting);
             if (Mathf.Abs(rect.horizontalNormalizedPosition - targethorizontal) <= 0.001)
             { isDrag = ; timecount = ; }
         }
         if (isDrag == )
         {
             timecount += Time.deltaTime;
             if (timecount > )
             {
                 AutoMove();
                 rect.horizontalNormalizedPosition = Mathf.Lerp(rect.horizontalNormalizedPosition, pages[curindex + dir * ], Time.deltaTime * smooting);
                 if (pages == null || OnPageChanged == null)
                     print("Error" + "," + (pages==null) + "," + (OnPageChanged == null));
                 OnPageChanged(pages.Count, curindex + dir * );
                 if (Mathf.Abs(rect.horizontalNormalizedPosition - pages[curindex + dir * ]) < 0.001)
                 {
                     timecount = ;
                 }
             }
         }
     }

     public void AutoMove()
     {
         for (int i = ; i < pages.Count; i++)
         {
             if (Mathf.Abs(pages[i] - rect.horizontalNormalizedPosition) < 0.001)
             {
                 curindex = i;
             }
         }
         if (curindex == pages.Count - ) { dir = -; }
         if (curindex == ) { dir = ; }
     }
     public void OnBeginDrag(PointerEventData eventData)
     {
         isDrag = ;

     }
     public  void MoveToPage(int target)
     {
         isDrag = ;
         targethorizontal = pages [target];
         if(target!=currentPageIndex)
         {
             currentPageIndex = target;
             OnPageChanged(pages.Count, currentPageIndex);
         }
     }
     public void OnEndDrag(PointerEventData eventData)
     {
         isDrag = ;

         float posX = rect.horizontalNormalizedPosition;
         int index = ;
         //假设离第一位最近
         float offset = Mathf.Abs(pages[index] - posX);
         for (int i = ; i < pages.Count; i++)
         {
             float temp = Mathf.Abs(pages[i] - posX);
             if (temp < offset)
             {
                 index = i;

                 //保存当前的偏移量
                 //如果到最后一页。反翻页。所以要保存该值，
                 offset = temp;
             }
         }

         if(index!=currentPageIndex)
         {
             currentPageIndex = index;
             OnPageChanged(pages.Count, currentPageIndex);
         }

         targethorizontal = pages[index];
     }

     void UpdatePages()
     {
         // 获取子对象的数量
         int count = this.rect.content.childCount;
         int temp = ;
         for(int i=; i<count; i++)
         {
             if(this.rect.content.GetChild(i).gameObject.activeSelf)
             {
                 temp++;
             }
         }
         count = temp;

         if (pages.Count!=count)
         {
             if (count != )
             {
                 pages.Clear();
                 for (int i = ; i < count; i++)
                 {
                     float page = ;
                     if(count!=)
                         page = i / ((float)(count - ));
                     pages.Add(page);
                 }
             }
             OnEndDrag(null);
         }
     }
 }