接上一章的,这一章我们着重介绍XMPP
为了方便程序调用,我们把XMPP的一些主要方法写在AppDelegate中
在AppDelegate.m下这几个方法为:
- -(void)setupStream{
- //初始化XMPPStream
- xmppStream = [[XMPPStream alloc] init];
- [xmppStream addDelegate:self delegateQueue:dispatch_get_current_queue()];
- }
- -(void)goOnline{
- //发送在线状态
- XMPPPresence *presence = [XMPPPresence presence];
- [[self xmppStream] sendElement:presence];
- }
- -(void)goOffline{
- //发送下线状态
- XMPPPresence *presence = [XMPPPresence presenceWithType:@"unavailable"];
- [[self xmppStream] sendElement:presence];
- }
- -(BOOL)connect{
- [self setupStream];
- //从本地取得用户名,密码和服务器地址
- NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
- NSString *userId = [defaults stringForKey:USERID];
- NSString *pass = [defaults stringForKey:PASS];
- NSString *server = [defaults stringForKey:SERVER];
- if (![xmppStream isDisconnected]) {
- return YES;
- }
- if (userId == nil || pass == nil) {
- return NO;
- }
- //设置用户
- [xmppStream setMyJID:[XMPPJID jidWithString:userId]];
- //设置服务器
- [xmppStream setHostName:server];
- //密码
- password = pass;
- //连接服务器
- NSError *error = nil;
- if (![xmppStream connect:&error]) {
- NSLog(@"cant connect %@", server);
- return NO;
- }
- return YES;
- }
- -(void)disconnect{
- [self goOffline];
- [xmppStream disconnect];
- }
这几个是基础方法,接下来就是XMPPStreamDelegate中的方法,也是接受好友状态,接受消息的重要方法
- //连接服务器
- - (void)xmppStreamDidConnect:(XMPPStream *)sender{
- isOpen = YES;
- NSError *error = nil;
- //验证密码
- [[self xmppStream] authenticateWithPassword:password error:&error];
- }
- //验证通过
- - (void)xmppStreamDidAuthenticate:(XMPPStream *)sender{
- [self goOnline];
- }
- //收到消息
- - (void)xmppStream:(XMPPStream *)sender didReceiveMessage:(XMPPMessage *)message{
- // NSLog(@"message = %@", message);
- NSString *msg = [[message elementForName:@"body"] stringValue];
- NSString *from = [[message attributeForName:@"from"] stringValue];
- NSMutableDictionary *dict = [NSMutableDictionary dictionary];
- [dict setObject:msg forKey:@"msg"];
- [dict setObject:from forKey:@"sender"];
- //消息委托(这个后面讲)
- [messageDelegate newMessageReceived:dict];
- }
- //收到好友状态
- - (void)xmppStream:(XMPPStream *)sender didReceivePresence:(XMPPPresence *)presence{
- // NSLog(@"presence = %@", 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];
- if (![presenceFromUser isEqualToString:userId]) {
- //在线状态
- if ([presenceType isEqualToString:@"available"]) {
- //用户列表委托(后面讲)
- [chatDelegate newBuddyOnline:[NSString stringWithFormat:@"%@@%@", presenceFromUser, @"nqc1338a"]];
- }else if ([presenceType isEqualToString:@"unavailable"]) {
- //用户列表委托(后面讲)
- [chatDelegate buddyWentOffline:[NSString stringWithFormat:@"%@@%@", presenceFromUser, @"nqc1338a"]];
- }
- }