iOS 之 通知

步骤一，注册消息：

[[NSNotificationCenter defaultCenter] 
addObserver:self 
selector:@selector(getUserProfileSuccess:)
name:@"Notification_GetUserProfileSuccess" 
object:nil];

notificationObserver 观察者 : self
notificationSelector 处理消息的方法名: getUserProfileSuccess 
notificationName 消息通知的名字: Notification_GetUserProfileSuccess
notificationSender 消息发送者 : 表示接收哪个发送者的通知，如果第四个参数为nil,接收所有发送者的通知

步骤二，发送消息

[[NSNotificationCenter defaultCenter] 
postNotificationName:@"Notification_GetUserProfileSuccess" 
object:userProfile 
userInfo:nil];

步骤三：接收消息

- (void) getUserProfileSuccess: (NSNotification*) aNotification
{
self.userProfile = [aNotification object];

lblName.text = self.userProfile.Name;

}