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云南网站建设,推广平台的方法,有赞小程序开发平台,我的世界网页版在线玩迭代器模式介绍设计模式定义案例迭代器模式行为型：关注对象与行为的分离提供了一种统一的方式来访问多个不同的集合两个集合：使用了不同的数据存储方式学生和警察查询显示出集合的内容 ，使用相同的代码问题堆积在哪里解决办法不同…

迭代器模式

介绍

设计模式	定义	案例
迭代器模式	行为型：关注对象与行为的分离提供了一种统一的方式来访问多个不同的集合	两个集合：使用了不同的数据存储方式学生和警察查询显示出集合的内容，使用相同的代码

问题堆积在哪里	解决办法
不同的存储方式统一集合查询代码	1 统一出一个存储方式 2 设计一个查询基类来统一查询代码 3 每个集合提供 1 统一存储方式， 2 一个查询实现（接口迭代器的实现）

类图

代码

interface BaseIterator<T>

/// <summary>
/// 迭代器基类
/// </summary>
public interface BaseIterator<T>
{// 当前T Current();// 下一个bool MoveNext();// 重新开始void Reset();
}

IteratorPolice

using System.Collections.Generic;public class IteratorPolice : BaseIterator<People>
{// 列表List<People> listPeople = null;// 下标int currentIndex = -1;  IteratorPolice() { }public IteratorPolice(List<People> list){listPeople = list;}public People Current(){if (null == listPeople)return null;if (listPeople.Count < currentIndex)return null;return listPeople[currentIndex];}public bool MoveNext(){if (null == listPeople)return false;if (listPeople.Count > ++currentIndex)return true;return false;}public void Reset(){currentIndex = -1;}
}

IteratorStudent


using System.Collections.Generic;public class IteratorStudent : BaseIterator<People>
{// 列表List<People> listPeople = null;// 下标int currentIndex = -1;IteratorStudent() { }public IteratorStudent(List<People> list){listPeople = list;}public People Current(){if (null == listPeople)return null;if (listPeople.Count < currentIndex)return null;return listPeople[currentIndex];}public bool MoveNext(){if (null == listPeople)return false;if (listPeople.Count > ++currentIndex)return true;return false;}public void Reset(){currentIndex = -1;}}

People


public class People
{public string name;public int age;public bool married;
}

StudentList

using System.Collections;
using System.Collections.Generic;
using UnityEngine;public class StudentList
{private List<People> list = new List<People>();private People[] studentList = new People[3];public StudentList(){People p1 = new People(){name = "WH",age = 15,married = false};studentList[0] = p1;People p2 = new People(){name = "QT",age = 16,married = false};studentList[1] = p2;People p3 = new People(){name = "YY",age = 15,married = false};studentList[2] = p3;for (int i = 0; i < studentList.Length; i++){list.Add(studentList[i]);}}public BaseIterator<People> GetIterator(){return new IteratorStudent(list);}
}

PoliceList


using System.Collections.Generic;public class PoliceList
{private List<People> list = new List<People>();public PoliceList(){People p1 = new People(){name = "WangQiang",age = 23,married = false};list.Add(p1);People p2 = new People(){name = "ZhangQiang",age = 30,married = true};list.Add(p2);People p3 = new People(){name = "LingQiang",age = 31,married = true};list.Add(p3);}public BaseIterator<People> GetIterator(){return new IteratorPolice(list); }
}

测试代码

using UnityEngine;public class TestDDQ : MonoBehaviour
{void Start(){{PoliceList pl = new PoliceList();BaseIterator<People> iterator = pl.GetIterator();while (iterator.MoveNext()){People p1 = iterator.Current();Debug.Log("姓名：" + p1.name + "   年龄：" + p1.age + "   是否结婚：" + p1.married + " ");}}Debug.Log("------------------------------------------------------------------");{StudentList pl = new StudentList();BaseIterator<People> iterator = pl.GetIterator();while (iterator.MoveNext()){People p1 = iterator.Current();Debug.Log("姓名：" + p1.name + "   年龄：" + p1.age + "   是否结婚：" + p1.married + " ");}}}
}