摘錄自：設(shè)計模式與游戲完美開發(fā)

十年磨一劍入热，作者將設(shè)計模式理論巧妙地融入到實(shí)踐中巴柿，以一個游戲的完整實(shí)現(xiàn)呈現(xiàn)設(shè)計模式的應(yīng)用及經(jīng)驗(yàn)的傳承 《軒轅劍》之父——蔡明宏届良、資深游戲制作人——李佳澤半开、Product Evangelist at Unity Technologies——Kelvin Lo舶吗、信仁軟件設(shè)計創(chuàng)辦人—— 賴信仁、資深3D游戲美術(shù)——劉明愷 聯(lián)合推薦全書采用了整合式的項目教學(xué)歹颓，即以一個游戲的范例來應(yīng)用23種設(shè)計模式的實(shí)現(xiàn)貫穿全書坯屿，讓讀者學(xué)習(xí)到整個游戲開發(fā)的全過程和作者想要傳承的經(jīng)驗(yàn)，并以淺顯易懂的比喻來解析難以理解的設(shè)計模式巍扛，讓想深入了解此領(lǐng)域的讀者更加容易上手领跛。

工程GitHub

using UnityEngine;
using System.Collections;

namespace DesignPattern_ChainofResponsibility
{
    // 處理訊息的介面
    public abstract class Handler
    {
        protected Handler m_NextHandler = null;

        public Handler( Handler theNextHandler )
        {
            m_NextHandler = theNextHandler;
        }

        public virtual void HandleRequest(int Cost)
        {
            if(m_NextHandler!=null)
                m_NextHandler.HandleRequest(Cost);
        }
    }
    
    // 處理所負(fù)責(zé)的訊息1
    public class ConcreteHandler1 : Handler
    {
        private int m_CostCheck = 10;

        public ConcreteHandler1( Handler theNextHandler ) : base( theNextHandler )
        {}

        public override void HandleRequest(int Cost)
        {
            if( Cost <= m_CostCheck)
                Debug.Log("ConcreteHandler1.核準(zhǔn)");
            else
                base.HandleRequest(Cost);
        }
    }

    // 處理所負(fù)責(zé)的訊息2
    public class ConcreteHandler2 : Handler
    {
        private int m_CostCheck = 20;
        
        public ConcreteHandler2( Handler theNextHandler ) : base( theNextHandler )
        {}
        
        public override void HandleRequest(int Cost)
        {
            if( Cost <= m_CostCheck)
                Debug.Log("ConcreteHandler2.核準(zhǔn)");
            else
                base.HandleRequest(Cost);
        }
    }

    // 處理所負(fù)責(zé)的訊息3
    public class ConcreteHandler3 : Handler
    {           
        public ConcreteHandler3( Handler theNextHandler ) : base( theNextHandler )
        {}  
        public override void HandleRequest(int Cost)
        {
            Debug.Log("ConcreteHandler3.核準(zhǔn)");
        }
    }

}

using UnityEngine;
using System.Collections;
using DesignPattern_ChainofResponsibility;

public class ChainofResponsibilityTest : MonoBehaviour {

    // Use this for initialization
    void Start () {
        UnitTest();
    }
    
    // 
    void UnitTest () {

        // 建立Cost驗(yàn)証的連接方式
        ConcreteHandler3 theHandle3 = new ConcreteHandler3(null);
        ConcreteHandler2 theHandle2 = new ConcreteHandler2(theHandle3);
        ConcreteHandler1 theHandle1 = new ConcreteHandler1(theHandle2);

        // 確認(rèn)
        theHandle1.HandleRequest(10);
        theHandle1.HandleRequest(15);
        theHandle1.HandleRequest(20);
        theHandle1.HandleRequest(30);
        theHandle1.HandleRequest(100);

    
    }
}