代码展示

玩家背包代码（挂载到玩家身上）

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
/// <summary>
/// 玩家背包脚本，用来记录玩家道具
/// </summary>
public class MyBag : MonoBehaviour
{
    //public bool isHasKey=false;//是否有钥匙
    public List<string>keyList = new List<string>();//钥匙列表
}

钥匙代码（挂载到钥匙身上）

注意：钥匙身上必须要有触发器（挂载到钥匙身上即可）

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

public class Key : MonoBehaviour
{
    public string keyID;//钥匙编号

    private void OnTriggerEnter(Collider other)
    {
        if(other.CompareTag("Player"))
        {
            //修改玩家背包中的钥匙数据为真
            if(other.GetComponent<MyBag>()!=null)
            {
                //other.GetComponent<MyBag>().isHasKey = true;
                other.GetComponent<MyBag>().keyList.Add(keyID);
               
            }
            Destroy(gameObject);
        }

    }
}

门的代码（挂载的门的触发器身上）

门的触发器可以单独拿出来，也可以就在门里面加组件

但是在门自身身上加组件时，触发器会随着门的移动而移动，所以用的时候要注意范围

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

public class _2_OpenDoor : MonoBehaviour
{
    [SerializeField] GameObject doorObj;//想要控制的门
    private bool isNear=false;//玩家是否到达门附近
    [SerializeField] private string doorID;//门编号
    // Start is called before the first frame update
    void Start()
    {
        if (doorObj == null)
            Debug.LogError("请将门物体拽入参数栏！");
    }
        private void OnTriggerEnter(Collider other)
        {
            if (other.CompareTag("Player")/*&&Input.GetKeyDown(KeyCode.E)*/)
            {
                //doorObj.SetActive(false);
                //播放开门动画
                isNear=true;
            }
        }

        private void OnTriggerExit(Collider other)
        {
            if (other.CompareTag("Player"))
            {
                //播放关门动画
                doorObj.GetComponent<Animator>().SetBool("isOpen", false);
                isNear=false;
            }
        }
        // Update is called once per frame
    private void Update()
    {
        if (Input.GetKeyDown(KeyCode.L) && isNear)
        {
            /*  //检测玩家背包中是否存在钥匙
              if(GameObject.FindWithTag("Player").GetComponent<MyBag>().isHasKey)
              { 
                  //播放开门动画
                  doorObj.GetComponent<Animator>().SetBool("isOpen", true); 
              }*/
            //播放开门动画
            if (GameObject.FindWithTag("Player").GetComponent<MyBag>() != null)
            {
                var mybag = GameObject.FindWithTag("Player").GetComponent<MyBag>();
                foreach (var keyID in mybag.keyList)
                {
                    if (keyID.Equals(doorID))
                    {
                        doorObj.GetComponent<Animator>().SetBool("isOpen", true);
                    }
                    else
                    {
                        print("玩家没有这扇门的钥匙");
                    }
                }
            }
        }
         else if(GameObject.FindWithTag("Player").GetComponent<MyBag>() != null)
        {
            print("玩家没有任何钥匙钥匙");
        }
        if (Input.GetKeyUp(KeyCode.L) && isNear)
        {
            //播放关门动画
            doorObj.GetComponent<Animator>().SetBool("isOpen", false);
        }

    }


}