xmpp messages are lost when client connection lost suddently

Question

I am using ejabberd server and ios xmppframework. there are two clients, A and B.

1. When A and B are online, A can send message to B successfu

Answer 1

If B goes offline suddenly then user A have to check if B is online/offline while sending message to user B. If user B is offline then user A have to upload that message on Server using Web service. And user B have to call web service on below function.

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions

So user B will get that all offline message which was lost due to connection Lost.