1.按下鼠标左键，检测鼠标点击到的UI对象

using System.Collections;using System.Collections.Generic;using UnityEngine;using UnityEngine.EventSystems;public class CustomBookMouseController : MonoBehaviour {    public LayerMask m_layerMask = 1;    public float m_dis = 1000;    public Camera m_rayCamera;            // Update is called once per frame    void Update () {        if (Input.GetMouseButtonDown(0))        {            if (EventSystem.current.IsPointerOverGameObject())            {                PointerEventData pointerData = new PointerEventData(EventSystem.current);                pointerData.position = Input.mousePosition;                List
     
       results = new List
      
       ();                EventSystem.current.RaycastAll(pointerData, results);                for (int i = 0; i < results.Count; i++)                {                    if (results[i].gameObject.layer==LayerMask.NameToLayer("BookUI"))                    {                        Debug.Log(results[i].gameObject.name);                    }                    Debug.Log(results[i].gameObject);                }            }        }    }}
      
     

2.物理射线的应用 需要在检测对象上添加碰撞器组件

var ray = m_rayCamera.ScreenPointToRay(Input.mousePosition);            RaycastHit hitInfo;            if (Physics.Raycast(ray, out hitInfo, m_dis, m_layerMask))            {                Debug.Log(hitInfo.collider.gameObject.name);            }