NSNotificationCenter的使用和解析

新建通知 和 要通知的内容

NSDictionary* dic =
@{@"username":username};

[[NSNotificationCenter
defaultCenter]postNotificationName:@"didReciveBuddyRequest"
object:nil
userInfo:dic];

然后监听通知 并解析info

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

-(void)didreceiveRequest:(NSNotification*)info

{

NSDictionary* dic = [info
userInfo];

NSString* username = [dic
objectForKey:@"username"];

}

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