title: how to get the message when receiving the "kCTMessageReceivedNotification" notification on IOS5
body: <p>With ios4.x I can use code below to get the message when get the "kCTMessageReceivedNotification" notification</p>
  
  <pre><code>CTTelephonyCenterAddObserver( ct, NULL, callback,NULL,NULL, CFNotificationSuspensionBehaviorHold); 
  
  if ([notifyname isEqualToString:@"kCTMessageReceivedNotification"])//receive message
      {
  
          NSDictionary *info = (NSDictionary *)userInfo;
          CFNumberRef msgID = (CFNumberRef)[info objectForKey:@"kCTMessageIdKey"];
          int result;
          CFNumberGetValue((CFNumberRef)msgID, kCFNumberSInt32Type, &amp;result);   
          Class CTMessageCenter = NSClassFromString(@"CTMessageCenter");
          id mc = [CTMessageCenter sharedMessageCenter];
          id incMsg = [mc incomingMessageWithId: result];}
  </code></pre>
  
  <p>But with ios5 I can't do it as incMsg is nil,so what can i do to get the message?</p>
  
  <p>Thanks</p>