Unity3D为3D物体添加点击事件

1.相机添加脚本《ClickEvent》:

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

public class ClickEvent : MonoBehaviour {

    public GameObject[] cube1; //3D物体集合

    private void Start()
    {
        //为相机添加3个组件
        if (this.gameObject.GetComponent<PhysicsRaycaster>() == null) {
            gameObject.AddComponent<PhysicsRaycaster>();
        }
        if (this.gameObject.GetComponent<EventSystem>() == null)
        {
            this.gameObject.AddComponent<EventSystem>();
        }

        if (this.gameObject.GetComponent<StandaloneInputModule>() == null)
        {
            gameObject.AddComponent<StandaloneInputModule>();
        }
        
        //为3D物体添加点击事件
        for (int i = 0; i < cube1.Length; i++)
        {
            AddObjectClickEvent(cube1[i]);
        }
    }

    public void