关于委托

 1 //声明委托
 2 public delegate void StartClockDelegate();
 3         public delegate void StopClockDelegate();
 4 //创建委托实例
 5         public StartClockDelegate StartClocks;
 6         public StopClockDelegate StopClocks;
 7 //通过调用委托调用方法
 8         public void StartClockRunning()
 9         {
10             this.StartClocks();
11         }
12         public void StopClockRunning()
13         {
14             this.StopClocks();
15         }
16 
17 
18 //将方法加到委托中
19 controller.StartClocks += localClock.StartLocalClock;
20             controller.StartClocks += londonClock.StartEuropeanClock;
21             controller.StartClocks += newYorkClock.StartAmericanClock;
22             controller.StartClocks += tokyoClock.StartJapaneseClock;
23             controller.StopClocks += localClock.StopLocalClock;
24             controller.StopClocks += londonClock.StopEuropeanClock;
25             controller.StopClocks += newYorkClock.StopAmericanClock;
26             controller.StopClocks += tokyoClock.StopJapaneseClock;