一：搭建一個即時聊天服務器推薦一下兩種，搭建方法大家自行百度一下，有很多詳細的教程

Openfire 使用 Java 語言編寫，比較容易上手，

ejabberd 使用 Erlang 語言編寫，是一款非常知名的 Erlang 開源項目，

 

二：開始進行登錄操作

1、新建一個 XMPPStream 對象，添加委托

添加委托方法 - (void)addDelegate:(id)delegate delegateQueue:(dispatch_queue_t)delegateQueue

參數 delegateQueue 為委托回調所使用的 GCD 隊列，dispatch_get_main_queue() 獲取主線程 GCD 隊列

2、設置 JID 和 主機名

JID 一般由三部分構成：用戶名，域名和資源名，例如 [email protected]/Anthony

如果沒有設置主機名，則使用 JID 的域名作為主機名

端口號是可選的，默認是 5222

3、連接

 

- (void)connect {
    if (self.xmppStream == nil) {
        self.xmppStream = [[XMPPStream alloc] init];
        [self.xmppStream addDelegate:self delegateQueue:dispatch_get_main_queue()];
    }
    
    if (![self.xmppStream isConnected]) {
        NSString *username = [[NSUserDefaults standardUserDefaults] objectForKey:@username];
        XMPPJID *jid = [XMPPJID jidWithUser:username domain:@lizhen resource:@Ework];
        [self.xmppStream setMyJID:jid];
        [self.xmppStream setHostName:@10.4.125.113];
        NSError *error = nil;
        if (![self.xmppStream connect:&error]) {
            NSLog(@Connect Error: %@, [[error userInfo] description]);
        }
    }
}

 

身份認證

實現 - (void)xmppStreamDidConnect:(XMPPStream *)sender 委托方法

連接服務器成功後，回調該方法

This method is called after the XML stream has been fully opened. More precisely, this method is called after an opening and tag have been sent and received, and after the stream features have been received, and any required features have been fullfilled. At this point it's safe to begin communication with the server.

身份認證方法 - (BOOL)authenticateWithPassword:(NSString *)inPassword error:(NSError **)errPtr

 

- (void)xmppStreamDidConnect:(XMPPStream *)sender {
    NSString *password = [[NSUserDefaults standardUserDefaults] objectForKey:@password];
    NSError *error = nil;
    if (![self.xmppStream authenticateWithPassword:password error:&error]) {
        NSLog(@Authenticate Error: %@, [[error userInfo] description]);
    }
}

 

 

上線

實現 - (void)xmppStreamDidAuthenticate:(XMPPStream *)sender 委托方法

身份認證成功後，回調該方法

This method is called after authentication has successfully finished.

If authentication fails for some reason, the xmppStream:didNotAuthenticate: method will be called instead.

新建一個 XMPPPresence 對象，類型為 available，發送！

- (void)xmppStreamDidAuthenticate:(XMPPStream *)sender {
    XMPPPresence *presence = [XMPPPresence presenceWithType:@available];
    [self.xmppStream sendElement:presence];
}

 

退出並斷開連接

新建一個 XMPPPresence 對象，類型為 unavailable，發送！

斷開連接

- (void)disconnect {
    XMPPPresence *presence = [XMPPPresence presenceWithType:@unavailable];
    [self.xmppStream sendElement:presence];
    
    [self.xmppStream disconnect];
}