XMPPFramework - c++编程基础

q"]; XMPPJID *myJID = self.xmppStream.myJID; [iq addAttributeWithName:@"from" stringValue:myJID.description]; [iq addAttributeWithName:@"to" stringValue:myJID.domain]; [iq addAttributeWithName:@"id" stringValue:[self generateID]]; [iq addAttributeWithName:@"type" stringValue:@"get"]; [iq addChild:query]; [self.xmppStream sendElement:iq]; } 复制代码

一个 IQ 响应：

　　id="1234567"

　　to="xiaoming@example.com">

type 属性，说明了该 iq 的类型为 result，查询的结果

标签的子标签，为查询的子项，即为 roster

item 标签的属性，包含好友的 JID，和其它可选的属性，例如昵称等。

通过实现

- (BOOL)xmppStream:(XMPPStream *)sender didReceiveIQ:(XMPPIQ *)iq;

方法

当接收到标签的内容时，XMPPFramework 框架回调该方法

- (BOOL)xmppStream:(XMPPStream *)sender didReceiveIQ:(XMPPIQ *)iq {
    if ([@"result" isEqualToString:iq.type]) {
        NSXMLElement *query = iq.childElement;
        if ([@"query" isEqualToString:query.name]) {
            NSArray *items = [query children];
            for (NSXMLElement *item in items) {
                NSString *jid = [item attributeStringValueForName:@"jid"];
                XMPPJID *xmppJID = [XMPPJID jidWithString:jid];
                [self.roster addObject:xmppJID];
            }
        }
    }
}

XMPPFramework(三)