外观模式提供了一个统一的接口,让我们可以统一的访问一系列的子系统。比如汽车就是外观,他的一个个子系统,如引擎、轮子、刹车等,通过访问汽车就能避免一系列繁琐的访问一个个子系统了。
using System; using System.Collections; using System.Collections.Generic; using System.Linq; namespace ConsoleApplication1 { class Program { public class Engine { public void Start() { Console.WriteLine("engine start"); } public void Stop() { Console.WriteLine("engine stop"); } } public class Brake { public void DoBrake() { Console.WriteLine("do brake"); } } public class Wheel { public void Start() { Console.WriteLine("wheel start"); } public void Stop() { Console.WriteLine("wheel stop"); } } public class Car { private Engine engine = new Engine(); private Wheel wheel = new Wheel(); private Brake brake = new Brake(); public void Run() { engine.Start(); wheel.Start(); } public void Stop() { engine.Stop(); wheel.Stop(); brake.DoBrake(); } } static void Main(string[] args) { Car car = new Car(); car.Run(); car.Stop(); } } }