Unity 工具之简单引用计数器的封装整理，继承即可使用，便于简单计数使用及相关计算事件触发

浅浅的花香味﹌ 2022-10-21 11:46 294阅读 0赞

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTQzNjEyODA_size_16_color_FFFFFF_t_70][]

# Unity 工具 之 简单引用计数器的封装整理，继承即可使用，便于简单计数使用及相关计算事件触发 #

**目录**

Unity 工具 之 简单引用计数器的封装整理，继承即可使用，便于简单计数使用及相关计算事件触发

一、简单介绍

二、实现原理

三、注意事项

四、效果预览

五、实现步骤

六、关键代码

--------------------

## 一、简单介绍 ##

Unity 工具类，自己整理的一些游戏开发可能用到的模块，单独独立使用，方便游戏开发。

本节介绍，在 Unity 开发中，进行计数器的封装，与使用，方便后期开发，如果你有更好的方法，欢迎留言，多谢。

## 二、实现原理 ##

1、接口，基类实现基本的计数功能，并添加相关的事件触发

2、本节案例，介绍一个房间进人开灯，没人关灯的案例，来介绍简单介绍计数器的使用

## 三、注意事项 ##

1、接口，和基类不唯一，可以根据自己的需要重新整理

2、OnRetainFromZero() 和 OnReleaseToZero() 函数根据自己需要可以抽象，也可以虚有，或者也可以增加其他数量监控的事件

## 四、效果预览 ##

![20210504105525264.gif][]

## 五、实现步骤 ##

1、打开 Unity，新建一个空工程

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTQzNjEyODA_size_16_color_FFFFFF_t_70 1][]

2、简单布置一下场景，添加一个 Plane，作为房间地面，并先关闭 Ligiht

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTQzNjEyODA_size_16_color_FFFFFF_t_70 2][]

3、在工程中添加脚本，BaseRefCounter 构建计数器的接口和基类，LightSwitch 等的开关类，RoomLightManager 管理房间进人的灯开关，TestRoomLightManager 模拟人进入和离开情景

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTQzNjEyODA_size_16_color_FFFFFF_t_70 3][]

4、把脚本 TestRoomLightManager 挂载到场景中，并对应赋值

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTQzNjEyODA_size_16_color_FFFFFF_t_70 4][]

5、运行场景，效果如上

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTQzNjEyODA_size_16_color_FFFFFF_t_70 5][]

## 六、关键代码 ##

1、BaseRefCounter

using System.Collections;
    using System.Collections.Generic;
    using UnityEngine;
    
    namespace Tool_XAN {
    
    	public interface IRefCounter { 
    		int RefCount { get; }
    		void Retain(object refOwner=null);
    		void Release(object refOwner=null);
    	}
    
    	public class BaseRefCounter: IRefCounter
    	{
            public int RefCount { get; private set; }
    
            public void Retain(object refOwner = null)
            {
                if (RefCount==0)
                {
                    OnRetainFromZero();
                }
                RefCount++;
            }
    
            public void Release(object refOwner = null)
            {
                RefCount--;
                if (RefCount==0)
                {
    
                    OnReleaseToZero();
                }
            }
    
            protected virtual void OnRetainFromZero() { }
            protected virtual void OnReleaseToZero() { }
        }
    }

2、LightSwitch

using System.Collections;
    using System.Collections.Generic;
    using UnityEngine;
    
    namespace Example_XAN
    { 
    
    	public class LightSwitch 
    	{
    		private Light mLight;
    		public LightSwitch(Light light) {
    			mLight = light;
    		}
    
    		public void Open() {
    			mLight.enabled = true;
    			Debug.Log("灯打开了……");
    		}
    
    		public void Close()
    		{
    			mLight.enabled = false;
    			Debug.Log("灯关闭了……");
    		}
    	}
    }

3、RoomLightManager

using System.Collections;
    using System.Collections.Generic;
    using Tool_XAN;
    using UnityEngine;
    
    namespace Example_XAN { 
    
    	public class RoomLightManager : BaseRefCounter
    	{
    		LightSwitch mLightSwitch;
    		List<GameObject> peopleLst;
    		public RoomLightManager(LightSwitch lightSwitch) {
    			mLightSwitch = lightSwitch;
    			peopleLst = new List<GameObject>();
    		}
    
    		public void EnterPeople() {
    
    			GameObject go = GameObject.CreatePrimitive(PrimitiveType.Capsule);
    			go.transform.position = RandomPos();
    			peopleLst.Add(go);
    
    			Retain();
    			Debug.Log("有人进入房间，目前房间人数为："+RefCount);
    		}
    
    		public void LeavePeople() {
    			GameObject go = peopleLst[Random.Range(0, peopleLst.Count)];
    			peopleLst.Remove(go);
    			GameObject.Destroy(go);
    
    
    			Release();
    			Debug.Log("有人离开房间，目前房间人数为：" + RefCount);
    		}
    
            protected override void OnRetainFromZero()
            {
    			mLightSwitch.Open();
    
    		}
    
            protected override void OnReleaseToZero()
            {
    			mLightSwitch.Close();
    		}
    
    		private Vector3 RandomPos() {
    			int x = Random.Range(-3,3);
    			int z = Random.Range(-3,3);
    			return new Vector3(x,1,z);
    		}
        }
    }

4、TestRoomLightManager

using System.Collections;
    using System.Collections.Generic;
    using UnityEngine;
    
    namespace Example_XAN
    { 
    
    	public class TestRoomLightManager : MonoBehaviour
    	{
    		public Light Light;
    		// Start is called before the first frame update
    		IEnumerator Start()
    		{
    			RoomLightManager room = new RoomLightManager(new LightSwitch(Light));
    
    			yield return new WaitForSeconds(0.5f);
    			room.EnterPeople();
    
    			yield return new WaitForSeconds(0.5f);
    			room.LeavePeople();
    
    			yield return new WaitForSeconds(1f);
    			room.EnterPeople();
    
    			yield return new WaitForSeconds(0.5f);
    			room.EnterPeople();
    
    			yield return new WaitForSeconds(0.5f);
    			room.LeavePeople();
    
    			yield return new WaitForSeconds(0.5f);
    			room.LeavePeople();
    		}
    
    		
    	}
    }

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTQzNjEyODA_size_16_color_FFFFFF_t_70 6][]

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[20210504105525264.gif]: /images/20221021/68a75183fb8049edb45e609fc30d52e5.png
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