xmpp 消息和好友上下线(3)
消息
//收到消息
- (void)xmppStream:(XMPPStream *)sender didReceiveMessage:(XMPPMessage *)message{
// NSLog(@"message = %@", message);
//消息的内容
NSString *msg = [[message elementForName:@"body"] stringValue];
//消息发送者
NSString *from = [[message attributeForName:@"from"] stringValue];
/****在此处****/
//通知聊天页面有新消息，需要处理
}
发送消息
//发送消息的xml格式
<message from='发送者账号'
to='接收者账号'
type='chat'>
<body>HELLO WORLD </body>
</message>
//代码组装
NSString *message = @"HELLO WORLD"; NSXMLElement *body = [NSXMLElement elementWithName:@"body"]; [body setStringValue:message]; //生成XML消息文档 NSXMLElement *mes = [NSXMLElement elementWithName:@"message"]; //消息类型 [mes addAttributeWithName:@"type" stringValue:@"chat"]; //发送给谁 [mes addAttributeWithName:@"to" stringValue:@"接受者账号"]; //由谁发送 [mes addAttributeWithName:@"from" stringValue:@"发送者账号"]; //组合 [mes addChild:body]; //发送消息 [[self xmppStream] sendElement:mes];
好友上下线通知
- (void)xmppStream:(XMPPStream *)sender didReceivePresence:(XMPPPresence *)presence
{
//取得好友状态
NSString *presenceType = [presence type]; //online/offline
//当前用户
NSString *userId = [[sender myJID] user];
//在线用户
NSString *presenceFromUser = [[presence from] user];
/*
//如果不是自己，如果涉及多段登录，此处最好加上else，如果是自己离线的话，调用上线协议
XMPPPresence *presence = [XMPPPresence presence];
[[self xmppStream] sendElement:presence];
*/
if (![presenceFromUser isEqualToString:userId])
{
//用户在线
if ([presenceType isEqualToString:@"available"])
{
//列表和数据库都要相应改变
}else if ([presenceType isEqualToString:@"unavailable"])//用户不在线
{
//列表和数据库都要相应改变
}
}
}
