Unity 制作图片轮播功能

功能：自动播放移动 首尾相接  鼠标移到图片上 时 移动停止并 该图片变大  鼠标离开图片恢复原形 轮播效果继续

效果如下

界面布局 大体是这个样子

scrollView就是一个底板带Image组件

Viewport负责遮罩带Mask组件

然后content前期布局使用了Group组件 不过项目需求图片尺寸要变化 所以之后关闭

子类Image是一张张图片

初版轮播 上代码

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

/**
 *两个背景图片平移 
 */
public class BackgroundController : MonoBehaviour
{
    public GameObject back1;
    public GameObject back2;
    public int speed = 1;                       //背景平移的速度
    public Transform endPosition;       //到达该位置,把背景移动到开始位置
    public Transform startPosition;      //背景从开始位置移动到结束位置

   
    //是否移动
    private bool isMove = true;
    void Update()
    {
        if (isMove == true)
        {
            //两个图片的平移
            back1.transform.position = new Vector3(back1.transform.position.x - speed * Time.deltaTime, back1.transform.position.y, back1.transform.position.z);
            back2.transform.position = new Vector3(back2.transform.position.x - speed * Time.deltaTime, back2.transform.position.y, back2.transform.position.z);
            //到达结束位置,回到开始位置,切换图片
            if (back1.transform.position.x <= endPosition.transform.position.x)
            {
                back1.transform.position = startPosition.transform.position;
            }
            if (back2.transform.position.x <= endPosition.transform.position.x)
            {
                back2.transform.position = startPosition.transform.position;
            }
        }
    }
}

这一步是 两个底板 首尾相连 update里一起运动 检测到达目标点 更换到尾部位置 初步轮播效果实现

下一步 上代码（完整版）

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

/**
 *两个背景图片平移 
 */
public class BackgroundController : MonoBehaviour
{
    public GameObject back1;
    public GameObject back2;
    public int speed = 1;                       //背景平移的速度
    public Transform endPosition;       //到达该位置,把背景移动到开始位置
    public Transform startPosition;      //背景从开始位置移动到结束位置

    private GameObject[] ContentChilders = new GameObject[14];
    void Start()
    {
        //进入检测添加
        UnityAction click = new UnityAction(OnPointerEnter);
        EventTrigger.Entry myclick = new EventTrigger.Entry();
        myclick.eventID = EventTriggerType.PointerEnter;
        myclick.callback.AddListener(click);
        //移出检测添加
        UnityAction click1 = new UnityAction(OnPointerExit);
        EventTrigger.Entry myclick1 = new EventTrigger.Entry();
        myclick1.eventID = EventTriggerType.PointerExit;
        myclick1.callback.AddListener(click1);
        int i = 0;
        foreach (Transform childer in back1.transform)
        {
            ContentChilders[i] = childer.gameObject;
            EventTrigger trigger = ContentChilders[i].AddComponent();
            trigger.triggers.Add(myclick);
            trigger.triggers.Add(myclick1);
            i++;
        }
        foreach (Transform childer in back2.transform)
        {
            ContentChilders[i] = childer.gameObject;
            EventTrigger trigger = ContentChilders[i].AddComponent();
            trigger.triggers.Add(myclick);
            trigger.triggers.Add(myclick1);
            i++;
        }
    }
    private RectTransform selObject;
    private void OnPointerEnter(BaseEventData arg0)
    {
        isMove = false;
        PointerEventData P_EveDat = arg0 as PointerEventData;
        selObject = P_EveDat.pointerCurrentRaycast.gameObject.transform as RectTransform;
        selObject.sizeDelta = new Vector2(200, 200);
    }

    private void OnPointerExit(BaseEventData arg0)
    {
        isMove = true;
        selObject.sizeDelta = new Vector2(160, 160);
    }

    //是否移动
    private bool isMove = true;
    void Update()
    {
        if (isMove == true)
        {
            //两个图片的平移
            back1.transform.position = new Vector3(back1.transform.position.x - speed * Time.deltaTime, back1.transform.position.y, back1.transform.position.z);
            back2.transform.position = new Vector3(back2.transform.position.x - speed * Time.deltaTime, back2.transform.position.y, back2.transform.position.z);
            //到达结束位置,回到开始位置,切换图片
            if (back1.transform.position.x <= endPosition.transform.position.x)
            {
                back1.transform.position = startPosition.transform.position;
            }
            if (back2.transform.position.x <= endPosition.transform.position.x)
            {
                back2.transform.position = startPosition.transform.position;
            }
        }
    }
}

首先 foreach 获取两个组里的所有图片子类  然后给图片子类添加事件监听  

EventTriggerType.PointerExit;鼠标移出的监听  对应 OnPointerEnter当鼠标进入图片的相应事件

EventTriggerType.PointerEnter 鼠标进入图片的监听

当鼠标进入图片进行 处理  停止轮播效果-->获取当前图片的尺寸-->进行尺寸放大

isMove = false;//停止轮播效果
        PointerEventData P_EveDat = arg0 as PointerEventData;
        selObject = P_EveDat.pointerCurrentRaycast.gameObject.transform as RectTransform;
        selObject.sizeDelta = new Vector2(200, 200);

同理 鼠标移出图片进行 处理  开始轮播效果-->获取当前图片的尺寸-->进行尺寸还原

//demo地址

链接：https://pan.baidu.com/s/1hD_FcARkoetWMFq-Cqrqsg 密码：9a2m