設計模式-行爲設計模式：觀察者模式 Observer

觀察者模式，就是某件事發生之後，會起連鎖反應，發生一系列的事

通知接口

 public interface INotify
    {
        void Notify();
    }

觀察者類

public class Teacher:INotify
    {
        public void Moshou()
        {
            Console.WriteLine("老師來沒收了手機");
        }

        public void Notify()
        {
            this.Moshou();
        }
    }

 public class Registrar:INotify
    {
        public void Jiaojiazhang()
        {
            Console.WriteLine("教務主任叫家長");
        }

        public void Notify()
        {
            this.Jiaojiazhang();
        }
    }

 public class Parent:INotify
    {
        public void Pangzou()
        {
            Console.WriteLine("家長帶回家一頓胖揍");
        }

        public void Notify()
        {
            this.Pangzou();
        }
    }

觸發事件類

 public class Student
    {
        public void GetPhone()
        {
            Console.WriteLine("學生上課拿出手機來玩");
            if (inotifyList != null && inotifyList.Count > 0)
            {
                foreach (INotify item in inotifyList)
                {
                    item.Notify();
                }
            }
        }

        public List<INotify> inotifyList = new List<INotify>();

        public void AddInotify(INotify inotify)
        {
            inotifyList.Add(inotify);
        }
       
    }

調用

Student stu = new Student();

            stu.AddInotify(new Teacher());
            stu.AddInotify(new Registrar());
            stu.AddInotify(new Parent());

            stu.GetPhone();