设计模式_中介者模式

中介者模式

介绍

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 gruop = new List();
 
    // 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people
        BasePeople 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