状态模式教你学会清蒸鲤鱼

最后更新于:2022-04-01 07:02:50

买了九妹已经快有一年了,从经历了android2.3.5到深度优化的flyme1.1.3,风风雨雨,伴随着我一起走过。而我对魅族手机的设计也颇为留意。魅族是一个学习型的团队,很为用户考虑。今天要讲的魅族闹钟的新功能——事件定时器。以前看到了,只感觉很实用,近段时间在复习设计模式的时候,突然发现,魅族的这个新功能,尽然就是状态模式的真实实例。 为了让了解的和不了解的状态模式的同行们都看得懂我接下来说的,我先简要的介绍一下这个状态模式: ### 状态模式 State       状态模式允许一个对象在其内部状态改变时改变它的行为,让对象看起来似乎修改了它的类。       状态模式就是把系统的多个状态分割开来,分布到State的子类中,消除了庞大的分支语句,减少了耦合,同时也很容易增加新的状态的和转换。        这就相当于一个Schedule或School Timetable一样,时间的改变,我们的行程或课程也随之改变。 ![](https://docs.gechiui.com/gc-content/uploads/sites/kancloud/2016-01-14_56970cf16523f.gif) 今天借助M9的新功能,跟大家来实验一下用状态模式做一次清蒸鲤鱼,让你在学习设计模式的时候,还另有收获。别的不多说,先上图: ![](https://docs.gechiui.com/gc-content/uploads/sites/kancloud/2016-01-14_56970cf2c171b.png) 其中状态有5种:PrepareTime,BoillingState,SteamshState,TurnOffFishState,SaucingState,对应操作的五个步骤。 ![](https://docs.gechiui.com/gc-content/uploads/sites/kancloud/2016-01-14_56970cf2d3605.png)          ![](https://docs.gechiui.com/gc-content/uploads/sites/kancloud/2016-01-14_56970cf2e7908.png)   ~~~ /// <summary> /// 制作清蒸鱼 /// </summary> public class SteamFish { private State current;//存储当前状态 public SteamFish() { current = new PrepareState(); } //总计时 private int timecount; //记录当前操作用时 private int time = 0; public int TimeCount { get { return timecount; } set { //记录当前操作用时 time = timecount; timecount = value; } } //任务完成标识 private bool finish = false; public bool TaskFinished { get { return finish; } set { finish = value; } } //切换状态 public void SetState(State s) { current = s; } //清蒸操作 public void SteamFishes() { //继续操作 current.Steam(this,time); } } ~~~ ~~~ /// <summary> /// 抽象状态 /// </summary> public abstract class State { //清蒸鱼 public abstract void Steam(SteamFish sf,int time); } ~~~ ~~~ /// <summary> /// 准备状态 /// </summary> public class PrepareState : State { private static int statictime;//本状态累积所用时间(秒) public override void Steam(SteamFish sf, int time) { statictime += (sf.TimeCount - time);//计算本状态累积所用时间(秒) if (sf.TimeCount <= 60) { if (statictime == (sf.TimeCount - time)) { Console.WriteLine("\r【清蒸鱼菜谱教程】\n\n①.将少许姜、盐、麻油放入鱼腹。" + "\t\t" + "所需时间 1分0秒 ,已用去 {0}分{1}秒。\n", statictime / 60, statictime % 60); } else { Console.WriteLine("\t\t\t\t\t亲,请稍等 ,已维持该状态 {0}分{1}秒。\n", statictime / 60, statictime % 60); } } else { statictime = 0; //下一步操作是:烧水 sf.SetState(new BoillingState()); sf.SteamFishes(); } } } ~~~ ~~~ /// <summary> /// 烧水状态 /// </summary> public class BoillingState:State { private static int statictime;//本状态累积所用时间(秒) public override void Steam(SteamFish sf, int time) { statictime += (sf.TimeCount - time);//计算本状态累积所用时间(秒) if (sf.TimeCount <= 150) { if (statictime == (sf.TimeCount - time)) { Console.WriteLine("②.往锅里放入适量的水并烧开。\t\t所需时间 1分30秒,已用去 {0}分{1}秒。\n", statictime / 60, statictime % 60); } else { Console.WriteLine("\t\t\t\t\t亲,请稍等 ,已维持该状态 {0}分{1}秒。\n", statictime / 60, statictime % 60); } } else { statictime = 0; //下一步操作是:煮鱼 sf.SetState(new SteamFishState()); sf.SteamFishes(); } } } ~~~ ~~~ /// <summary> /// 蒸鱼状态 /// </summary> class SteamFishState:State { private static int statictime;//本状态累积所用时间(秒) public override void Steam(SteamFish sf, int time) { statictime += (sf.TimeCount - time);//计算本状态累积所用时间(秒) if (sf.TimeCount <= 570) { if (statictime == (sf.TimeCount - time)) { Console.WriteLine("③.把鱼放入锅中,合上盖子。" + "\t\t" + "所需时间 7分0秒,已用去 {0}分{1}秒。\n", statictime / 60, statictime % 60); } else { Console.WriteLine("\t\t\t\t\t亲,请稍等 ,已维持该状态 {0}分{1}秒。\n", statictime / 60, statictime % 60); } } else { statictime = 0; //下一步操作是:关火 sf.SetState(new TurnOffState()); sf.SteamFishes(); } } } ~~~ ~~~ /// <summary> /// 关火状态 /// </summary> class TurnOffState:State { private static int statictime;//本状态累积所用时间(秒) public override void Steam(SteamFish sf,int time) { statictime += (sf.TimeCount - time);//计算本状态累积所用时间(秒) if (sf.TimeCount <= 870) { if (statictime == (sf.TimeCount - time)) { Console.WriteLine("④.关火,别打开盖!" + "\t\t\t" + "所需时间 5分0秒,已用去 {0}分{1}秒。\n", statictime / 60, statictime % 60); } else { Console.WriteLine("\t\t\t\t\t亲,请稍等 ,已维持该状态 {0}分{1}秒。\n", statictime / 60, statictime % 60); } } else { statictime = 0; //下一步操作是:烧水 sf.SetState(new SaucingState()); sf.SteamFishes(); } } } ~~~ ~~~ /// <summary> /// 调料状态 /// </summary> class SaucingState:State { private static int statictime;//本状态累积所用时间(秒) public override void Steam(SteamFish sf, int time) { statictime += (sf.TimeCount - time);//计算本状态累积所用时间(秒) if (sf.TimeCount <= 880) { if (statictime == (sf.TimeCount - time)) { Console.WriteLine("⑤.开盖,调料淋遍鱼身!" + "\t\t\t" + "所需时间 0分10秒,已用去 {0}分{1}秒。\n", statictime / 60, statictime % 60); } else { Console.WriteLine("\t\t\t\t\t亲,请稍等 ,已维持该状态 {0}分{1}秒。\n", statictime / 60, statictime % 60); } } else { sf.TaskFinished = true; Console.WriteLine("开抢了,再不抢就没了!"); } } } ~~~ 客户端代码: ~~~ static void Main(string[] args) { //【清蒸鱼操作教程】 SteamFish sf = new SteamFish(); sf.TimeCount = 60; sf.SteamFishes(); sf.TimeCount = 100; sf.SteamFishes(); sf.TimeCount = 150; sf.SteamFishes(); sf.TimeCount = 570; sf.SteamFishes(); sf.TimeCount = 600; sf.SteamFishes(); sf.TimeCount = 870; sf.SteamFishes(); sf.TimeCount = 880; sf.SteamFishes(); sf.TimeCount = 1000; sf.SteamFishes(); Console.Read(); } ~~~ 效果: ![](https://docs.gechiui.com/gc-content/uploads/sites/kancloud/2016-01-14_56970cf30c965.png)
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