XMPP+iOS Delivered,SENT known SEEN Receipt not known - ios

Question

I have gone through the XEP 0184 and have done following implementation.
If XMPP is connected and packet then is send then i set the status for each message as SENT (✔︎) if I don't get following callback.
-(void)xmppStream:(XMPPStream *)sender didReceiveError:(id)error
If i get the received status from XEP 0184 implemented in Objective C, I set the status as Delivered (✔︎✔︎)
RECV: < message xmlns="jabber:client" from="[phone]#wer.com/2323"
to="[phone]#wer.com/2223" lang="" >< received
xmlns="urn:xmpp:receipts" id="avv-33343"/ >< /message >
But my question is how to show the SEEN status for each message as readh XMPP 0079 that is Advanced Messaging protocol is doing this. But I could not find in Objective C.
Can anyone please help? If my direction is correct and I am missing something could you let me know?
A code snippet guidance would be much appreciated.
Here is my implementation.
Using the stack documentation help I have added the following lines to get the delivery receipts.
XMPPMessageDeliveryReceipts* xmppMessageDeliveryReceipts = [[XMPPMessageDeliveryReceipts alloc] initWithDispatchQueue:dispatch_get_main_queue()];
xmppMessageDeliveryReceipts.autoSendMessageDeliveryReceipts = YES;
xmppMessageDeliveryReceipts.autoSendMessageDeliveryRequests = YES;
[xmppMessageDeliveryReceipts activate:self.xmppStream];
Now due to this I get the following response for the send and RECV xml.
SEND: 111111111 for avv-33343 Id message.
RECV: < message xmlns="jabber:client" from="[phone]#wer.com/2323"
to="[phone]#wer.com/2223" lang="" >< received
xmlns="urn:xmpp:receipts" id="avv-33343"/ >< /message >
But this is just giving me info that the message is delivered but how to send the SEEN receipts like above to intimate the sender that the other end user have acknowledged + SEEN the message.
Something like this ... RECV: < seen xmlns="urn:xmpp:receipts" id="222-4444"/ >

Answer 1

For seen status use same functionality as send a normal message with same id which message received and you want to mark seen on Sender device,
When on sender device receive a static message #"to#fromSeen" with same message id for sent/delivered message, When receiver get exist msg id already in db then your purpose resolve .
Code for send seen status
NSString *bodymessageString = [NSString stringWithFormat:#"to#fromSeen"];
NSString *str_loginUser = [NSString stringWithFormat:#"%##%#", [[NSUserDefaults standardUserDefaults]valueForKey:#"mobile"],kXMPPServer ];
NSString *str_OtherUser = [NSString stringWithFormat:#"%##%#",str_OtherUserRegName,kXMPPServer];
NSXMLElement *body = [NSXMLElement elementWithName:#"body"];
[body setStringValue:bodymessageString];
NSXMLElement *message = [NSXMLElement elementWithName:#"message"];
[message addAttributeWithName:#"type" stringValue:#"chat"];
[message addAttributeWithName:#"from" stringValue:str_loginUser];
// [[[delegate xmppStream] myJID] bare]
[message addAttributeWithName:#"to" stringValue:str_OtherUser];
// NSString *messageID= [XMPPStream generateUUID];
[message addAttributeWithName:#"id" stringValue:str_msgID];
// NSXMLElement *request = [NSXMLElement elementWithName:#"request" xmlns:#"urn:xmpp:receipts"];
// [message addChild:request];
[message addChild:body];
[[delegate xmppStream] sendElement:message];
[ChatData GetUpdateToDatabase:str_msgID :#"Seen"];
Code for check message status in appdelegate file
if ([message isChatMessageWithBody])
{
if ([msg isEqualToString:#"to#fromSeen"])
{
BOOL is_Exist;
is_Exist = [ChatData GetAllReadyAvailable :message.elementID];
if (is_Exist == YES)
{
NSString *str_status = [ChatData getstatusChatBy:message.elementID];
if (![str_status isEqualToString:#"Seen"])
{
[ChatData GetUpdateToDatabase:message.elementID :#"Seen"];
}
}
}
else
{
BOOL is_Exist;
is_Exist = [ChatData GetAllReadyAvailable :message.elementID];
if (is_Exist == NO)
{
// Store message in DB
}
}
}
else if ([message hasReceiptResponse])
{
}
else if([message isErrorMessage])
{}