IOS 通知（实现及时聊天接受消息的现实）

//接受消息
-(void)xmppStream:(XMPPStream *)sender didReceiveMessage:(XMPPMessage *)message{

NSLog(@"%@说：%@",message.from,message.body);
[[NSNotificationCenter defaultCenter]postNotificationName:@"didREceiveMessage" object:nil userInfo:@{@"message":message}];

NSNotificationCenter *nc = [NSNotificationCenter defaultCenter];
//设置广播内容
NSDictionary *dict = [NSDictionary dictionaryWithObjectsAndKeys:
message.body, @"ThemeName", nil];
//将内容封装到广播中 给ios系统发送广播
[nc postNotificationName:@"getmessage" object:self userInfo:dict];// getmessage频道
}

NSNotificationCenter *nc = [NSNotificationCenter defaultCenter];
// 成为听众一旦有广播就来调用self recvBcast:函数
[nc addObserver:self selector:@selector(recvBcast:) name:@"getmessage" object:nil];

- (void) recvBcast:(NSNotification *)notify
{
static int index;
NSLog(@"recv bcast %d", index++);
NSDictionary *dict = [notify userInfo];
NSString *getmessageTemp = [dict objectForKey:@"ThemeName"];
NSLog(@"name的值：%@",getmessageTemp);
[self.meassage addObject:getmessageTemp];
[self.tView reloadData];
}