XMPPIQ未在vCard中设置vCard标签

我正在尝试检索几个JID的vCard,包括当前用户。我已初始化并激活 XMPPvCardTempModule 使用以下代码-

_xmppvCardStorage = [XMPPvCardCoreDataStorage sharedInstance];
_xmppvCardTempModule = [[XMPPvCardTempModule alloc] initWithvCardStorage:self.xmppvCardStorage];
_xmppvCardAvatarModule = [[XMPPvCardAvatarModule alloc] initWithvCardTempModule:self.xmppvCardTempModule];
[self.xmppvCardTempModule           activate:self.xmppStream];
[self.xmppvCardAvatarModule         activate:self.xmppStream];
[self.xmppvCardAvatarModule addDelegate:self delegateQueue:dispatch_get_main_queue()];
[self.xmppvCardTempModule addDelegate:self delegateQueue:dispatch_get_main_queue()];

然后我实现了以下委托方法-

- (void)xmppvCardTempModule:(XMPPvCardTempModule *)vCardTempModule
        didReceivevCardTemp:(XMPPvCardTemp *)vCardTemp
                     forJID:(XMPPJID *)jid{
    DDLogDebug(@"Received vCard for %@ \n vCard:%@",jid.full,vCardTemp.XMLString);
    ContactCore* contact = [appDelegate.coreDataController findContact:jid.user];
    contact.vCard = vCardTemp;
    [appDelegate.dataController postContactUpdateNotification:contact];
}
- (void)xmppvCardTempModuleDidUpdateMyvCard:(XMPPvCardTempModule *)vCardTempModule{
    [self.selfContact setVCard:vCardTempModule.myvCardTemp];
}
- (void)xmppvCardTempModule:(XMPPvCardTempModule *)vCardTempModule failedToUpdateMyvCard:(DDXMLElement *)error{
    DDLogDebug(@"failedToUpdateMyvCard Error: %@",error.XMLString);
}

-(void)xmppvCardAvatarModule:(XMPPvCardAvatarModule *)vCardTempModule didReceivePhoto:(UIImage *)photo forJID:(XMPPJID *)jid{
    ContactCore* contact = [appDelegate.coreDataController findContact:jid.user];
}

问题是这些委托方法都没有被调用。我可以在日志数据中看到vCard输出,这意味着vCard正在正确获取。所以我实施了 didReceiveIQ 要直接从源获取vCard,请使用以下代码-

- (BOOL)xmppStream:(XMPPStream*)sender didReceiveIQ:(XMPPIQ *)iq{
    XMPPvCardTemp *vCard = [XMPPvCardTemp vCardTempSubElementFromIQ:iq];
    if(vCard){
        ContactCore* contact = [appDelegate.coreDataController findContact:iq.from.user];
        contact.vCard = vCard;
    }
    return NO;
}

但是 vCard 从未初始化。我检查了IQ,我收到了它们。然后我正确地检查了整个XML,发现 电子名片交换格式 标签不存在,它被替换为联系人的实际姓名。例如,这是我为其中一个联系人得到的-

<iq
    xmlns="jabber:client" from="xxx@xxx.com" to="xxx@xxx.com/xxx" id="12345" type="result">
    <Abhi
        xmlns="vcard-temp" prodid="-//HandGen//NONSGML vGen v1.0//EN" version="2.0">
        <PHOTO>
            <TYPE>image/jpeg</TYPE>
            <BINVAL><!--A long Base64 code--></BINVAL>
        </PHOTO>
    </Abhi>
</iq>

标签 <Abhi> 应该是 <vCard> 对于 vCardTempSubElementFromIQ 方法将其标识为 电子名片交换格式 。我想知道这是正常行为还是我做错了什么?如果这是我做错的事情,那么正确的做法应该是什么?