A simple way to use notification hubs Nsnotificationcenter

Nsnotificationcenter(Notification Center)
  "Note" to remove the observer from the Dealloc  Get notification hubs Singleton object

nsnotificationcenter *center=[nsnotificationcenter defaultcenter];

 Common methods:1.Registered Observer-(void) Addobserver: (ID) Observer selector: (SEL) Aselector Name: (NSString*) AName object: (ID) AnObject; Parameters:Observer: ViewerAselector: This method is called automatically when a notification is received          AName: Message content ("password" to receive notifications) AnObject: Generally forNil2. Send a notification message-(void) Postnotificationname: (NSString*) AName object: (ID) AnObject UserInfo: (nsdictionary*) Auserinfo; Parameters:AName: Who registered the Notification Center, the viewer mode setting this message content, then notify whoAnObject: Transmitted parameters (arbitrary object)Auserinfo: The Transferred dictionary nsnotification(If the notified person invokes a method with parameters, pass this object over) Common methods: 1. Gets the passed arguments-(ID) object; 2. Get the passed dictionary

-(nsdictionary *) UserInfo;

A simple way to use notification hubs Nsnotificationcenter