事件接口

将含改代码的脚本挂到UI上，可实现相应效果

using UnityEngine;
using UnityEngine.EventSystems;


public class Juse : MonoBehaviour,IPointerEnterHandler,IPointerExitHandler
{
    public void OnPointerEnter(PointerEventData eventData)
    {
        Debug.Log("Enter");
    }

    public void OnPointerExit(PointerEventData eventData)
    {
        Debug.Log("Exit");
    }
}