如何確定聊天中的消息狀態（讀取/未讀）？

Question

如何確定消息狀態（讀取/未讀取）。聊天是通過XMPP協議實現的。

Answer 1

XEP-0184：消息傳遞迴執支持在發送消息時通知發件人。只要您不希望現有客戶發送這些收據，您可以將其用作構建模塊 - XEP目前尚未廣泛實施。

Answer 2

我認爲你需要使用顯示的聊天標記，每http://xmpp.org/extensions/xep-0333.html

Answer 3

XMPP協議不具有讀/未讀回執。雖然收到的是在XEP-0184中實施的東西。

Answer 4

如果您希望獲取已讀回執，而不是發送自動消息傳遞收據，則只要用戶閱讀該消息就發送它。每條消息都有相應的message_id。使用該message_id發送已讀取的特定消息的傳遞收據。在建立連接時添加以下代碼

//message delivery 
    XMPPMessageDeliveryReceipts* xmppMessageDeliveryRecipts = [[XMPPMessageDeliveryReceipts alloc] initWithDispatchQueue:dispatch_get_main_queue()]; 
//don't write this line as it will send auto receipts whenever message will be delivered 
    //xmppMessageDeliveryRecipts.autoSendMessageDeliveryReceipts = YES; 
    xmppMessageDeliveryRecipts.autoSendMessageDeliveryRequests = YES; 
    [xmppMessageDeliveryRecipts activate:self.xmppStream]; 

我通過在消息實體中添加「chatStatus」屬性來解決此問題。對於發件人，我已將chatStatus的值保存爲發送，未發送或接收（由其他方接收或不接收）。對於接收方我已經將值保持爲已讀或未讀（我是否閱讀過郵件，因此對於未讀郵件，我可以發送已讀收據）。

在點擊發送按鈕：

//Save to your Message Entity 

NSMutableDictionary *m = [[NSMutableDictionary alloc] init]; 
[m setObject: message_body forKey:@"message_body"]; 
[m setObject:messageID forKey:@"message_id"]; 
[m setObject:@"yes" forKey:@"isOutgoing"]; 
[m setObject:dateString forKey:@"date"]; 
[m setObject:timeString forKey:@"time"]; 
[m setObject:[NSDate date] forKey:@"timeStamp"]; 
[m setObject:yourId forKey:@"from"]; 
[m setObject:toId forKey:@"to"]; 

if (!Is_InternetAvailable]) { 
[m setObject:unsent forKey:@"chatStatus"]; 
} 
else{ 
[m setObject:sent forKey:@"chatStatus"]; 
} 
[[CoreDataMethods sharedCoreDataMethods] saveUserMessage:m]; 
} 

在的cellForRowAtIndexPath：

if ([message isoutGoing]) {//If I have sent the message 

     // Mine bubble 
     if ([[messageDict valueForKey:@"chatStatus"] isEqualToString:unsent]) { 
      //set unsent image 
     } 
     else if ([[messageDict valueForKey:@"chatStatus"] isEqualToString:sent]){ 
      //set sent image 
     } 
     else if ([[messageDict valueForKey:@"chatStatus"] isEqualToString:received]){ 
      //set Received Image 
     } 
    } 
    else{ 
     // Other Bubble , Notify them that you have read the message if it is unread/new message 

     if ([[messageDict valueForKey:@"chatStatus"] isEqualToString:unread]) { 

      //send read receipt 
       NSXMLElement *receivedelement = [NSXMLElement elementWithName:@"received" xmlns:@"urn:xmpp:receipts"]; 

       NSXMLElement *message = [NSXMLElement elementWithName:@"message" xmlns:@"jabber:client"]; 
       [message addAttributeWithName:@"to" stringValue:toId]; 
       [message addAttributeWithName:@"from" stringValue:fromID]; 
       [receivedelement addAttributeWithName:@"id" stringValue:[messageDict valueForKey:@"message_id"]]; 
       [message addChild:receivedelement]; 

       //XMPPMessage *generatedReceiptResponse = [[messageDict valueForKey:@"xmppMessage"] generateReceiptResponse]; 
       [[[kAppDelegate xmppHandler] xmppStream] sendElement:message]; 

       // update message entity 
       [self updateChatStatus:read withMessageID:[messageDict valueForKey:@"message_id"]]; 
     } 
    } 

最後，當您收到送達回執didReceiveMessage，更新chatStatus收到

- (void)xmppStream:(XMPPStream *)sender didReceiveMessage:(XMPPMessage *)message{ 

if ([message hasReceiptResponse]) {//message read 
//Update database message entity 
[self updateChatStatus:@"received" withMessageID:[message receiptResponseID]]; 
} 
} 

您可以根據您的要求設置chatStatus的值。至於未發送的消息，我已將它設置爲在didSendMessage委託中發送。

注意：在我的應用程序，我不得不只顯示讀取，發送和未設置狀態，而不是交付狀態。如果您還想要顯示送貨狀態，則不要評論autoSendMessageDeliveryReceipts，並且每次閱讀郵件時，都會將IQ節發送給發件人，而不是發送收據並相應地更改chatStatus。

這只是基本的想法，你可以根據你的要求使用它。

希望它有助於！