[[NSNotificationCenter defaultCenter] postNotificationName:@"callOutWithChatter" object:@{@"chatter":self.chatter, @"type":[NSNumber numberWithInt:eCallSessionTypeVideo],@"isOrderChater":isOrderChatter}];?//广播端传递三个参数
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(callOutWithChatter:) name:@"callOutWithChatter" object:nil];//广播中心接受
- (void)callOutWithChatter:(NSNotification *)notification
{
id object = notification.object;
NSString *chatter = [object objectForKey:@"chatter"];
}//接受到以后，在事件里面处理接收到参数，