Delegate & event

Event:(Events in unity3d are used to replace the sendmessage mechanism)

C # event definition,

1: first, a delegate is required, which is equivalent to the Event Response. C # comes with an eventhandler that accepts the sender object and the event parameter eventargs (the event parameter type that comes with C ).

You can also write your own delegate and pass the parameters you want, without using the C # built-in eventhandler and eventargs.

 
1Public Delegate VoidMyeventhandler (event EVT );
 

2: Define an event and bind the event to your defined delegate.

 
1 Public EventMyeventhandlerMyevthandlers;
 

3: Then you need to add a method (trigger) to trigger this event.

1Public VoidDispatchevent (event EVT)2 {3 Myevthandlers(EVT );4}
 

4: the definition of such an event is complete. This is only used for calling. You can use +-to add or delete event responses.

 1       Class  Mainclass  2   {  3               Public   Static  Void Main ( String  [] ARGs)  4   {  5 Console. writeline ( "  Hello event!  "  );  6                     7 Eventdispatcher ED = New Eventdispatcher ();// The first three steps are defined in the eventdispatcher class. The registration event method is implemented in different classes.  8 Ed. myevthandlers + = New  Myeventhandler (onevt );  10 Event EVT = New Event ( "  Fuckname  " , True , Null  );  11  Ed. dispatchevent (EVT );  12   }  13         14               Private   Static   Void  Onevt (event EVT)  15   {  16 Console. writeline ( "  Event name {0}  " , EVT. evtname );  17   }  18 }

Refer:

1. http://www.everyday3d.com/blog/index.php/2010/10/04/c-events-and-unity3d/

2. http://msdn.microsoft.com/en-us/library/aa645739%28VS.71%29.aspx

3, http://forum.unity3d.com/threads/38094-Is-SendMessage-really-that-bad? P = 245970 # post245970