private void Start()
{
ConcreteObserver1 observer1 = new ConcreteObserver1(subject1);
subject1.RegisterObserver(observer1);
//subject1.SubjectState = "猫进来了"; //主题的数据被赋值时，就去更新了观察者的状态 ----这句代码可以放到一个点击事件里
}
private void Start()
{
ConcreteSubject1 sub1 = new ConcreteSubject1();
ConcreteObserver1 ob1 = new ConcreteObserver1(sub1);
sub1.RegisterObserver(ob1);
sub1.SubjectState = "更新了一条消息";
}
private void Start()
{
//WeatherStation ws = new WeatherStation();
//BillboardA a = new BillboardA();
//BillboardB b = new BillboardB();
//BillboardC c = new BillboardC();
//ws.Update(a, b, c);
ConcreteSubject1 sub1 = new ConcreteSubject1();
ConcreteObserver1 ob1 = new ConcreteObserver1(sub1);
ConcreteObserver2 ob2 = new ConcreteObserver2(sub1);
sub1.RegisterObserver(ob1);
sub1.RegisterObserver(ob2);
sub1.subjectState = "温度";
}
private void Start()
{
//WeatherStation weather = new global::WeatherStation();
//BillBoardA a = new BillBoardA();
//BillBoardB b = new BillBoardB();
//BillBoardC c = new BillBoardC();
//weather.Update(a,b,c);
////不符合开闭原则 ：对修改关闭，对扩展开放
////当需求变更，我们需要扩展显示布告板D,E，F....我们就得必须修改 WeatherStation的Update（）
ConcreteSubject1 sub1 = new ConcreteSubject1();
sub1.RegisterObserver(new ConcreteObserver1(sub1));
sub1.RegisterObserver(new ConcreteObserver2(sub1));
sub1.subjectState = "温度 27，湿度 18，气候 多云";
sub1.subjectState = "温度 32，湿度 24，气候 晴天";
}
void Start()
{
//WeatherStation mWeatherStation = new WeatherStation();
//BillboardA mBillboardA = new BillboardA();
//BillboardB mBillboardB = new BillboardB();
//BillboardC mBillboardC = new BillboardC();
//mWeatherStation.mBillboardHandler += mBillboardA.Show;
//mWeatherStation.mBillboardHandler += mBillboardB.Show;
//mWeatherStation.mBillboardHandler += mBillboardC.Show;
//mWeatherStation.Update();
ConcreteSubject1 mConcreteSubject1 = new ConcreteSubject1();
ConcreteObserver1 mConcreteObserver1 = new ConcreteObserver1(mConcreteSubject1);
mConcreteSubject1.RegisterObserver(mConcreteObserver1);
mConcreteSubject1.subjectState = "状态改变";
}