iOS中 XMPP即时通讯实现的主要步骤

这里只是列出实现的只要步骤，不是全部代码。

首先导入XMPPFramework，及相关配置，完成后开始。

创建一个XMPPHelper  类来管理要进行的操作。

XMPPHelper.h文件如下

 typedef void(^loginSuccessBlock)(void);
 typedef void(^loginFailBlock)(NSString *info);
 typedef void(^fenchFridendList)(id result);
 typedef void(^logoutSuccessBlock)(void);
 typedef void(^registerSuccessBlock)(void);
 typedef enum {
     kTypeLogin,
     kTypeRegister
 }ConnectType;
 #import <Foundation/Foundation.h>
 #define kXMPPHosetName @"lala"
 #define kXMPPHostAddress @"192.168.13.17"
 #define kHostPort 5222

 @interface XMPPHelper : NSObject
 {

     ConnectType _connectType;

 }
 @property(nonatomic,strong)XMPPStream *stream;
 @property(nonatomic,strong)XMPPRoster *roster;
 @property(nonatomic,copy)NSString *username;
 @property(nonatomic,copy)NSString *password;

 @property(nonatomic,copy)loginSuccessBlock loginSuccessBlock;
 @property(nonatomic,copy)loginFailBlock loginFailBlock;
 @property(nonatomic,copy)fenchFridendList fenchFriendList;
 @property(nonatomic,copy)logoutSuccessBlock logoutSuccessBlock;
 @property(nonatomic,copy)registerSuccessBlock registerSuccessblock;

 +(instancetype)shareInstance;
 //登陆
 -(void)login:(NSString *)username password:(NSString *)password loginSuccessBlock:(loginSuccessBlock)block loginFailBlock:(loginFailBlock)failBlcok;
 //获取好友列表
 -(void)loadFriendList:(fenchFridendList)fenchfriendList;
 //发送消息
 -(void)sendMessage:(NSString *)message toUser:(NSString *)jid;
 //注销
 -(void)logoutAction:(logoutSuccessBlock)block;
 //注册
 -(void)registerAction:(NSString *)username password:(NSString *)password registerSuccessBlock:(registerSuccessBlock)registerBlock;

 @end

XMPPHelper.m文件如下

#define kHostAddress @"192.168.13.12"
#define kHostName @"zy"
#define KHostPort 5222
#import "XMPPHelper.h"
#import "User.h"

static XMPPHelper *helper = nil;
@interface XMPPHelper() <XMPPStreamDelegate>{
    ConnectTyep _connectType;
}
@end
@implementation XMPPHelper

//单例
+ (instancetype) shareInstance {
    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{
        helper = [[XMPPHelper alloc] init];
        [helper _stepXMPPHelper];
    });
    return helper;
}

//初始化的操作
- (void) _stepXMPPHelper {
    //初始化流对象.
    self.stream = [[XMPPStream alloc] init];
    //创建自动连接的对象,当意外断开的时候,可以进行自动连接.
    XMPPReconnect *reConnect = [[XMPPReconnect alloc] init];

    //初始化花名册对象(好友列表)
    //存储方式.
    XMPPRosterCoreDataStorage *storage = [[XMPPRosterCoreDataStorage alloc] init];
    self.roster = [[XMPPRoster alloc] initWithRosterStorage:storage];

    //建立对象之间的联系
    //激活.
    [reConnect activate:self.stream];
    //激活,使用花名册对象.
    [self.roster activate:self.stream];

    //设置代理;
    [self.stream addDelegate:self delegateQueue:dispatch_get_main_queue()];
    [self.roster addDelegate:self delegateQueue:dispatch_get_main_queue()];

    //设置服务器的基本信息.
    //服务器的地址
    [self.stream setHostName:kHostAddress];
    [self.stream setHostPort:KHostPort];
    //端口号
}

#pragma mark XMPP 对外公开方法
- (void) login:(NSString *)userName password:(NSString *)password loginSuccessBlock:(LoginSuccessBlock)block loginFailBlock:(LoginFailBlock)failBlock {

    _connectType = kTypeLogin;

    self.userName = userName;
    self.password = password;
    self.loginFailBlock = failBlock;
    self.loginSuccessBlock = block;
    //登录的流程.
    if (![self connect]) {
        //连接失败的时候 调用失败的block
        if (self.loginFailBlock) {
            self.loginFailBlock(@"网络错误");
        }
    }
}
//发起连接
- (BOOL) connect {
    //设置用户的jid
    NSString *jidString = [NSString stringWithFormat:@"%@@%@",self.userName,kHostName];
    //创建了一个jid对象
    XMPPJID *jid = [XMPPJID jidWithString:jidString];
    [self.stream setMyJID:jid];
    NSError *ERROR = nil;
  return [self.stream connectWithTimeout: error:&ERROR];
}
//上线的方法
- (void) online {
    //默认情况下 上线的状态
    XMPPPresence *presence = [XMPPPresence presence];
    [self.stream sendElement:presence];
}

//下线的方法
- (void) outLine {

    XMPPPresence *presence = [XMPPPresence presenceWithType:@"unavailable"];//unavailable 离线的意思
    //发送离线状态
    [self.stream sendElement:presence];

}

//查询好友列表

/**
 <iq from='guojing@wxhl' type='get' id='roster_1' to='域名'>
    <query xmlns='jabber:iq:roster'/> <!-- iq 信息有多种，根据命名空间来区分-->
 </iq>

 */
- (void) loadFriendList :(FentchFriendList) fentchFriendList {

    self.fentchFriendList  = fentchFriendList;
    //创建xml片段
    //创建<iq></iq>
    NSXMLElement *iqElement = [NSXMLElement elementWithName:@"iq"];
    XMPPJID *jid = self.stream.myJID;
    [iqElement addAttributeWithName:@"from" stringValue:[jid description]];
    //jid.domain  ---> 服务器的域名
    [iqElement addAttributeWithName:@"to" stringValue:jid.domain];
    [iqElement addAttributeWithName:@"type" stringValue:@"get"];
    [iqElement addAttributeWithName:@"id" stringValue:@""];

    //创建子节点
    NSXMLElement *queryElement = [NSXMLElement elementWithName:@"query" xmlns:@"jabber:iq:roster"];
    //给iq节点增加子节点.
    [iqElement addChild:queryElement];
    //发送请求(好友列表)
    [self.stream sendElement:iqElement];
}
//发送消息
//发送消息的格式
/**
 <message
    to='huangrong@wxhl'
    from='guojing@wxhl'
    type='chat'
        xml:lang='en'>
    <body>有个bug帮我看下</body>
 </message>
 */
- (void) sendMessage:(NSString *)message toUser:(NSString *) jid {

    //NIL
    if (!message || [message isEqualToString:@""]) {
        return;
    }

    NSXMLElement *messageElement = [NSXMLElement elementWithName:@"message"];

    [messageElement addAttributeWithName:@"to" stringValue:jid];
    XMPPJID *myJid = self.stream.myJID;
    [messageElement addAttributeWithName:@"from" stringValue:myJid.description];

    [messageElement addAttributeWithName:@"type" stringValue:@"chat"];

    [messageElement addAttributeWithName:@"xml:lang" stringValue:@"en"];
    //<message></message>创建完毕
    //创建子节点<body></body>
    NSXMLElement *bodyElement = [NSXMLElement elementWithName:@"body" stringValue:message];
    [messageElement addChild:bodyElement];

    //发送消息
    [self.stream sendElement:messageElement];
}

//注销方法
- (void) logOutAction : (LogoutSuccessBlock) block {
    //发送离线的消息
    [self outLine];

    //断开连接,主动断开链接
    [self.stream disconnect];

    if (block) {
        block();
    }
}
//注册的方法
- (void) registerUser:(NSString *)userName password:(NSString *)password registerSuccessBlock:(RegisterSuccessBlock) block {
    _connectType = kTypeRegister;
    //连接
    self.userName = userName;
    self.password = password;
    self.registerBlock = block;

    [self connect];
}

#pragma mark - XMPP DELEGAET
- (void)xmppStreamDidConnect:(XMPPStream *)sender {
    NSLog(@"连接成功");
    //注册流程和登录流程都要使用该方法.在这里就要进行逻辑上判断
    if (_connectType == kTypeRegister) {
        [self.stream registerWithPassword:self.password error:nil];
    }else if(_connectType == kTypeLogin){
        //如果连接成功,则继续验证密码.
        [self.stream authenticateWithPassword:self.password error:nil];
    }
}
//验证成功的方法
- (void)xmppStreamDidAuthenticate:(XMPPStream *)sender {
    NSLog(@"验证成功");
    //要调用成功的block
    //发送上线的状态.
    [self online];
    if (self.loginSuccessBlock) {
        self.loginSuccessBlock();
    }
}
//验证失败的方法
- (void)xmppStream:(XMPPStream *)sender didNotAuthenticate:(NSXMLElement *)error {
    NSLog(@"验证失败");
    //如果认证失败的话,要主动断开连接
    [self.stream disconnect];
    if (self.loginFailBlock) {
        self.loginFailBlock(@"密码错误");
    }
}
//获取查询信息
- (BOOL)xmppStream:(XMPPStream *)sender didReceiveIQ:(XMPPIQ *)iq {
    /**
     //根节点
     <iq xmlns="jabber:client" type="result" id="123456" to="1234@zy/f54fcd02">
        <query xmlns="jabber:iq:roster">
            <item jid="gxb@localhost" name="" ask="subscribe" subscription="none">
                <group>联系人列表</group>
            </item>
            <item jid="laoyan@zy" name="laoyan" subscription="both">
                <group>12</group>
            </item>
            <item jid="deskmate@zy" name="deskmate" subscription="both">
                <group>12</group>
                <group>12</group>
            </item>
            <item jid="test123@zy" name="test123" subscription="both">
                <group>联系人列表</group>
            </item>
            <item jid="zhengqingqing@192.168.13.12" name="" ask="subscribe" subscription="none">
                <group>联系人列表</group>
            </item>
            <item jid="liuweiwei@zy" name="" subscription="both">
                <group>让你变绿</group>
                <group>让你变绿</group>
            </item>
            <item jid="zhengqingqing@zy" name="zhengqingqing" subscription="both">
                <group>让你变绿</group>
            </item>
            <item jid="gxb1@zy" name="" subscription="both">
                <group>联系人列表</group>
                <group>联系人列表</group>
                <group>变绿了</group>
            </item>
            <item jid="123456@localhost" name="" ask="subscribe" subscription="none">
                <group>联系人列表</group>
            </item>
        </query>
     </iq>
     */
    //需要要类型是 字典
    /**
     dic = {
        "联系人列表":[user1,user3],
        "12":[user2]
     }
     */
    NSMutableDictionary *results = [NSMutableDictionary dictionary];
    NSXMLElement *queryElement = iq.childElement;
    //遍历Query节点
    User *user = nil;
    for (NSXMLElement *itemElement in queryElement.children) {

        user = [[User alloc] init];

        NSString *jidString = [itemElement attributeStringValueForName:@"jid"];

        user.jid = jidString;

        NSString *userName = [itemElement attributeStringValueForName:@"name"];

        user.username = userName;

        for (NSXMLElement *groupElement in itemElement.children) {
            //组名 12
            NSString *groupString = groupElement.stringValue;

            NSMutableArray *users = results[groupString];

            if (users == nil) {
                users = [NSMutableArray array];
                results[groupString] = users;
            }
            [users addObject:user];
        }
    }

    if (self.fentchFriendList) {
        self.fentchFriendList(results);
    }

    NSLog(@"获取好友列表 %@",results);
    return YES;
}
//监听外部传过来的数据,就是如果有好友发来信息,则,回调此方法.
/**
 //传过来很多message标签,我们只需要带body的message标签
 <message xmlns="jabber:client" type="chat" id="purplea775e98a" to="1234@zy" from="gxb1@zy/MacdeMacBook-Pro-3"><composing xmlns="http://jabber.org/protocol/chatstates"/></message>
 2015-11-18 09:35:20.264 WeChat[3162:161262] message is <message xmlns="jabber:client" type="chat" id="purplea775e98b" to="1234@zy" from="gxb1@zy/MacdeMacBook-Pro-3"><active xmlns="http://jabber.org/protocol/chatstates"/><body>sad</body></message>
 2015-11-18 09:35:30.491 WeChat[3162:161262] message is <message xmlns="jabber:client" type="chat" id="purplea775e98c" to="1234@zy" from="gxb1@zy/MacdeMacBook-Pro-3"><active xmlns="http://jabber.org/protocol/chatstates"/></message>
 */
- (void)xmppStream:(XMPPStream *)sender didReceiveMessage:(XMPPMessage *)message {
    //判断当前的message标签是否带body子标签
    if ([message isChatMessageWithBody]) {
        NSString *body = message.body;
        //获取发信息的人的jid
        XMPPJID *jidFrom = message.from;

        NSDictionary *messageDic = @{
                                     @"fromUser":jidFrom.description,
                                     @"text":body
                                     };

        //通知,发出接收消息的通知
        [[NSNotificationCenter defaultCenter] postNotificationName:kRecevieMessageNotification object:nil userInfo:messageDic];

    }

}
//注册成功调用的方法
- (void)xmppStreamDidRegister:(XMPPStream *)sender {
    _connectType = kTypeLogin;
    self.loginSuccessBlock = self.registerBlock;
    self.registerBlock = nil;
    [self xmppStreamDidConnect:sender];
}

@end

把宏定义改成自己的参数，在相关的UI操作代码中创建  单例XMPPHelper  然后调用相关方法，并在相关的代理方法中实现必要的操作就可以了。