设计模式_中介者模式

中介者模式

介绍

设计模式	定义	案例	问题堆积在哪里	解决办法
中介者	代替了多个对象之间的互动 使对象1 2 3 之间的互动 变为： 对象1->中介 对象2->中介 对象3->中介	好友之间 约饭	好友1 通知 好友2 -3 -4 等等	加一个群 谁想吃饭就 通知一下

类图

代码

角色

BasePeople        // 基类

FriendA

FriendB

FriendC               

FriendGroup        // 群

BasePeople       

public abstract class BasePeople
{public string name;public abstract void ReceiverMsg(string msg);public abstract void Send(string msg);
}

FriendA

using UnityEngine;public class FriendA : BasePeople
{FriendA() { }public FriendA(string name){this.name = name;}public override void ReceiverMsg(string msg){Debug.Log(name + "接收:" + msg);}public override void Send(string msg){Debug.Log(name + "发送:" + msg);FriendGroup.GetIns().SendAllPeopleMsg(name, msg);}
}

FriendB 类似A

FriendC类似A

FriendGroup 

using System.Collections.Generic;public class FriendGroup 
{//---------------------------------------------static FriendGroup self = null;private FriendGroup() { }public static  FriendGroup GetIns(){if (null == self){self = new FriendGroup();}return self;}//--------------------------------------------List<BasePeople> gruop = new List<BasePeople>();// 添加public void AddPeople(BasePeople friend){if (null == friend)return;gruop.Add(friend);}// 发送public void SendAllPeopleMsg(string senderName, string msg){foreach (var item in gruop){if (senderName != item.name){item.ReceiverMsg(msg);}}}}

测试代码
 

using UnityEngine;public class TestZJZ : MonoBehaviour
{void Start(){// 创建peopleBasePeople p1 = new FriendA("P1");BasePeople p2 = new FriendA("P2");BasePeople p3 = new FriendA("P3");// 创建群FriendGroup group = FriendGroup.GetIns();group.AddPeople(p1);group.AddPeople(p2);group.AddPeople(p3);p3.Send("晚上8点吃饭！");}
}

结果

总结

在 多对象之间互相通信 提炼出一个中介者 ，会让类图变得简单漂亮