即时通信

XMPPManager.h

#import <Foundation/Foundation.h>
#import "XMPPFramework.h"

@interface XMPPManager : NSObject

/**
 *  创建一个通道的属性
 */
@property (nonatomic, strong) XMPPStream *xmppStream;

/**
 *  管理好友，好友的列表
 */
@property (nonatomic, strong) XMPPRoster *xmppRoster;

/**
 *  和聊天相关的属性
 */
@property (nonatomic, strong) XMPPMessageArchiving *messageArchiving;

/**
 *  消息归档
 */
@property (nonatomic, strong) NSManagedObjectContext *context;


// 创建单例
+ (instancetype)shareManager;

// 登录的方法
- (void)loginWithUserName:(NSString *)userName password:(NSString *)password;

// 注册的方法
- (void)registerWithUserName:(NSString *)userName password:(NSString *)password;

// 添加好友
- (void)addFriend;
// 删除好友
- (void)removeFriendWithName:(NSString *)name;

@end

XMPPManager.m

#import "XMPPManager.h"

// 列举枚举（登录和注册）
typedef NS_ENUM(NSInteger, ConnectToServerPurpose) {
    ConnectToServerPurposeLogin,
    ConnectToServerPurposeRegister,
};


@interface XMPPManager () <XMPPStreamDelegate, XMPPRosterDelegate>

// 登录的属性
@property (nonatomic, strong) NSString *userName;  // 用户名
@property (nonatomic, strong) NSString *password;  // 密码

// 注册的属性
@property (nonatomic, strong) NSString *registerUserName;  // 用户名
@property (nonatomic, strong) NSString *registerPassword;  // 密码

// 记录当前是登录还是注册
@property (nonatomic, assign) ConnectToServerPurpose connectToserver;

// 接收添加好友的名字
@property (nonatomic, strong) UITextField *textField;

@end


static XMPPManager *xmpp = nil;

@implementation XMPPManager

// 创建单例
+ (instancetype)shareManager {
    
    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{
        xmpp = [[XMPPManager alloc] init];
    });
    return xmpp;
}


#pragma mark - 初始化
- (instancetype)init {
    
    if (self = [super init]) {
        
#pragma mark - 初始化通道
        // 初始化通道对象
        self.xmppStream = [[XMPPStream alloc] init];
        
        // 设置openfire服务器地址
        self.xmppStream.hostName = kHostName;
        
        // 设置服务器端口号
        self.xmppStream.hostPort = kHostPort;
        
        // 添加代理
        [self.xmppStream addDelegate:self delegateQueue:dispatch_get_main_queue()];
        
        
#pragma mark - 管理好友
        //获取管理好友的单例对象
        XMPPRosterCoreDataStorage *rosterStorage = [XMPPRosterCoreDataStorage sharedInstance];
        
        // 初始化好友列表
        self.xmppRoster = [[XMPPRoster alloc] initWithRosterStorage:rosterStorage dispatchQueue:dispatch_get_global_queue(0, DISPATCH_QUEUE_PRIORITY_BACKGROUND)];
        
        // 在通道中激活添加好友
        [self.xmppRoster activate:self.xmppStream];
        
        // 设置花名册代理
        [self.xmppRoster addDelegate:self delegateQueue:dispatch_get_main_queue()];
        
        
#pragma mark - 管理消息
        // 获取管理消息的存储对象
        XMPPMessageArchivingCoreDataStorage *storage = [XMPPMessageArchivingCoreDataStorage sharedInstance];
        
        // 进行消息管理器的初始化
        self.messageArchiving = [[XMPPMessageArchiving alloc] initWithMessageArchivingStorage:storage dispatchQueue:dispatch_get_main_queue()];
        
        // 在通道中激活
        [self.messageArchiving activate:self.xmppStream];
        
        // 设置代理
        [self.messageArchiving addDelegate:self delegateQueue:dispatch_get_main_queue()];
        
        // 管理上下文
        self.context = storage.mainThreadManagedObjectContext;
        
    }

    return self;
}


#pragma mark - 登录和注册的方法
// 登录方法的实现
- (void)loginWithUserName:(NSString *)userName password:(NSString *)password {
    
    self.userName = userName;
    self.password= password;
    
    // 记录登录状态
    self.connectToserver = ConnectToServerPurposeLogin;
    
    // 连接服务器
    [self linkServer];
}


// 注册方法的实现
- (void)registerWithUserName:(NSString *)userName password:(NSString *)password {
    
    self.registerUserName = userName;
    self.registerPassword = password;
    
    // 记录登录状态
    self.connectToserver = ConnectToServerPurposeRegister;
    
    // 连接服务器
    [self linkServer];
}


#pragma mark - 连接服务器
- (void)linkServer {
    
    // 判断是登录还是注册
    NSString *string = [[NSString alloc] init];
    switch (self.connectToserver) {
        case ConnectToServerPurposeLogin:
            string = [NSString stringWithFormat:@"%@", self.userName];
            break;
        case ConnectToServerPurposeRegister:
            string = [NSString stringWithFormat:@"%@", self.registerUserName];
            break;
            
        default:
            break;
    }
    
    // 要链接服务器，要有用户认证
    // 身份证
    // 参数1：用户名
    // 参数2：域名
    // 参数3：资源
    // 通过通道进行身份验证
    XMPPJID *jid = [XMPPJID jidWithUser:string domain:kDomin resource:kResource];
    self.xmppStream.myJID = jid;
    
    // 如果当前聊天工具处于链接状态或者已经链接了，此时，你需要去切断链接，【此逻辑不唯一】
    if ([self.xmppStream isConnected] || [self.xmppStream isConnecting]) {
        [self disconnectToServer];
    }
    
    // 链接超时
    NSError *error = nil;
    [self.xmppStream connectWithTimeout:5 error:&error];
    
    if (error) {
        NSLog(@"服务器链接超时");
    }
}


// 断开链接
- (void)disconnectToServer {
    
    // 当前用户下线了
    XMPPPresence *presence = [XMPPPresence presenceWithType:@"unavailable"];
    
    // 告诉通道下线了
    [self.xmppStream sendElement:presence];
    
    // 使通道失去链接
    [self.xmppStream disconnect];
}


#pragma mark - XMPPStreamDelegate协议方法
#pragma mark - 链接超时
- (void)xmppStreamConnectDidTimeout:(XMPPStream *)sender {
    
    NSLog(@"连接超时");
}


#pragma mark - 连接成功
- (void)xmppStreamDidConnect:(XMPPStream *)sender {
    
    NSLog(@"连接成功");
    
    // 区分登录和注册进行密码验证
    switch (self.connectToserver) {
        case ConnectToServerPurposeLogin:
            // 登录密码的验证
            [self.xmppStream authenticateWithPassword:self.password error:nil];
            break;
        case ConnectToServerPurposeRegister:
            // 注册密码的验证
            [self.xmppStream registerWithPassword:self.registerPassword error:nil];
            break;
            
        default:
            break;
    }
}


#pragma mark - 断开链接
- (void)xmppStreamDidDisconnect:(XMPPStream *)sender withError:(NSError *)error {
    
    // 1.自己手动断开
    // 2.被动断开
    if (error) {
        NSLog(@"断开链接，error = %@", error);
    }
}


#pragma mark - 认证失败(登录失败)
- (void)xmppStream:(XMPPStream *)sender didNotAuthenticate:(DDXMLElement *)error {
    
    NSLog(@"认证失败, error = %@", error);
}


#pragma mark - 认证成功(登录成功)
- (void)xmppStreamDidAuthenticate:(XMPPStream *)sender {
    
    // 上线
    XMPPPresence *presennce = [XMPPPresence presenceWithType:@"available"];
    [self.xmppStream sendElement:presennce];
    
    NSLog(@"登录成功");
}


#pragma mark - 添加好友
- (void)addFriend {
    
    UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"添加好友" message:@"请输入好友的姓名" preferredStyle:UIAlertControllerStyleAlert];
    
    __weak typeof(self)mySelf = self;
    [alertController addTextFieldWithConfigurationHandler:^(UITextField * _Nonnull textField) {
        mySelf.textField = textField;
    }];
    
    UIAlertAction *action1 = [UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleCancel handler:^(UIAlertAction * _Nonnull action) {
        NSLog(@"取消添加好友");
    }];
    UIAlertAction *action2 = [UIAlertAction actionWithTitle:@"确定" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
        // 使用JID记录
        XMPPJID *friendJID = [XMPPJID jidWithUser:mySelf.textField.text domain:kDomin resource:kResource];
        
        // 监听好友的动作
        [mySelf.xmppRoster subscribePresenceToUser:friendJID];
        NSLog(@"===============%@", mySelf.textField.text);
        // 添加好友
        [mySelf.xmppRoster addUser:friendJID withNickname:mySelf.textField.text];
    }];
    
    [alertController addAction:action1];
    [alertController addAction:action2];
    
    [[self getCurrentVC] presentViewController:alertController animated:YES completion:nil];
}


//获取当前屏幕显示的viewcontroller
- (UIViewController *)getCurrentVC
{
    UIViewController *result = nil;
    
    UIWindow * window = [[UIApplication sharedApplication] keyWindow];
    if (window.windowLevel != UIWindowLevelNormal)
    {
        NSArray *windows = [[UIApplication sharedApplication] windows];
        for(UIWindow * tmpWin in windows)
        {
            if (tmpWin.windowLevel == UIWindowLevelNormal)
            {
                window = tmpWin;
                break;
            }
        }
    }
    
    UIView *frontView = [[window subviews] objectAtIndex:0];
    id nextResponder = [frontView nextResponder];
    
    if ([nextResponder isKindOfClass:[UIViewController class]])
        result = nextResponder;
    else
        result = window.rootViewController;
    
    return result;
}


#pragma mark - 删除好友
- (void)removeFriendWithName:(NSString *)name {
    
    // 使用JID记录要删除的用户
    XMPPJID *friendJID = [XMPPJID jidWithUser:name domain:kDomin resource:kResource];
    
    // 停止监听好友
    [self.xmppRoster unsubscribePresenceFromUser:friendJID];
    
    // 删除好友
    [self.xmppRoster removeUser:friendJID];
}


#pragma mark - XMPPRosterDelegate代理方法
// 开始获取好友
- (void)xmppRosterDidBeginPopulating:(XMPPRoster *)sender {
    
    NSLog(@"开始获取好友");
}


// 结束获取好友
- (void)xmppRosterDidEndPopulating:(XMPPRoster *)sender {
    
    NSLog(@"结束获取好友");
}


// 接受好友的信息
- (void)xmppRoster:(XMPPRoster *)sender didReceiveRosterItem:(DDXMLElement *)item {
    
    // 好友状态的显示信息
    NSLog(@"好友信息====%@", item);
}


// 收到好友监听请求，是同意还是拒绝
- (void)xmppRoster:(XMPPRoster *)sender didReceivePresenceSubscriptionRequest:(XMPPPresence *)presence {
    
    NSLog(@"获取好友请求");
}

@end

LoginViewController.m

#import "LoginViewController.h"
#import "Masonry.h"
#import "RegisterViewController.h"
#import "XMPPManager.h"
#import "RosterTableViewController.h"

@interface LoginViewController () <XMPPStreamDelegate>

/**
 *  姓名输入框
 */
@property (nonatomic, strong) UITextField *userTextField;

/**
 *  密码输入框
 */
@property (nonatomic, strong) UITextField *passwordTextField;

/**
 *  登录按钮
 */
@property (nonatomic, strong) UIButton *loginButton;

/**
 *  注册按钮
 */
@property (nonatomic, strong) UIButton *registerButton;

@end

@implementation LoginViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view.
    
    self.navigationItem.title = @"首页";
    self.view.backgroundColor = [UIColor orangeColor];
    
    
    // 布局页面
    [self initLayout];
    
    
    // 给登录和注册按钮添加事件
    [_loginButton addTarget:self action:@selector(loginClick:) forControlEvents:UIControlEventTouchUpInside];
    [_registerButton addTarget:self action:@selector(registerClick:) forControlEvents:UIControlEventTouchUpInside];
    
    
    // 设置代理
    [[XMPPManager shareManager].xmppStream addDelegate:self delegateQueue:dispatch_get_main_queue()];
    
}


#pragma mark - 登录和注册按钮的点击事件
// 登录按钮的点击事件
- (void)loginClick:(UIButton *)sender {
    
    [[XMPPManager shareManager] loginWithUserName:self.userTextField.text password:self.passwordTextField.text];
}


// 注册按钮的点击事件
- (void)registerClick:(UIButton *)sender {
    
    RegisterViewController *registerVC = [[RegisterViewController alloc] init];
    [self.navigationController pushViewController:registerVC animated:YES];
}


#pragma mark - XMPPStreamDelegate代理方法
// 登录成功
- (void)xmppStreamDidAuthenticate:(XMPPStream *)sender {
    
    NSLog(@"登录成功");
    
    RosterTableViewController *rosterVC = [[RosterTableViewController alloc] init];
    [self.navigationController pushViewController:rosterVC animated:YES];
}

// 登录失败
- (void)xmppStream:(XMPPStream *)sender didNotAuthenticate:(DDXMLElement *)error {
    
    NSLog(@"登录失败");
}


#pragma mark - 布局页面
- (void)initLayout {
    
    // 创建子控件
    _userTextField = [[UITextField alloc] init];
    _userTextField.borderStyle = UITextBorderStyleRoundedRect;
    _userTextField.layer.cornerRadius = 5;
    _userTextField.backgroundColor = [UIColor whiteColor];
    _userTextField.placeholder = @"请输入用户名";
    [self.view addSubview:_userTextField];
    
    _passwordTextField = [[UITextField alloc] init];
    _passwordTextField.borderStyle = UITextBorderStyleRoundedRect;
    _passwordTextField.layer.cornerRadius = 5;
    _passwordTextField.backgroundColor = [UIColor whiteColor];
    _passwordTextField.placeholder = @"请输入密码";
    [self.view addSubview:_passwordTextField];
    
    _loginButton = [UIButton buttonWithType:UIButtonTypeSystem];
    _loginButton.layer.cornerRadius = 5;
    [_loginButton setTitle:@"登   录" forState:UIControlStateNormal];
    [_loginButton setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
    _loginButton.backgroundColor = [UIColor whiteColor];
    [self.view addSubview:_loginButton];
    
    _registerButton = [UIButton buttonWithType:UIButtonTypeSystem];
    _registerButton.layer.cornerRadius = 5;
    [_registerButton setTitle:@"注   册" forState:UIControlStateNormal];
    [_registerButton setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
    _registerButton.backgroundColor = [UIColor whiteColor];
    [self.view addSubview:_registerButton];
    
    
    // 设置frame
    [_userTextField mas_makeConstraints:^(MASConstraintMaker *make) {
        
        make.top.offset(120);
        make.left.offset(50);
        make.right.offset(-50);
        make.height.mas_equalTo(50);
        
    }];
    
    [_passwordTextField mas_makeConstraints:^(MASConstraintMaker *make) {
        
        make.top.equalTo(_userTextField.mas_bottom).offset(50);
        make.left.offset(50);
        make.right.offset(-50);
        make.height.mas_equalTo(50);
        
    }];
    
    [_loginButton mas_makeConstraints:^(MASConstraintMaker *make) {
        
        make.top.equalTo(_passwordTextField.mas_bottom).offset(50);
        make.left.offset(80);
        make.width.mas_equalTo((self.view.frame.size.width - 80 - 80 - 50) / 2);
        make.height.mas_equalTo(50);
        
    }];
    
    [_registerButton mas_makeConstraints:^(MASConstraintMaker *make) {
        
        make.top.equalTo(_loginButton.mas_top);
        make.right.offset(-80);
        make.width.mas_equalTo((self.view.frame.size.width - 80 - 80 - 50) / 2);
        make.height.mas_equalTo(50);
        
    }];
}

@end

RegisterViewController.m

#import "RegisterViewController.h"
#import "Masonry.h"
#import "XMPPManager.h"

@interface RegisterViewController () <XMPPStreamDelegate>

/**
 *  姓名输入框
 */
@property (nonatomic, strong) UITextField *userTextField;

/**
 *  密码输入框
 */
@property (nonatomic, strong) UITextField *passwordTextField;

/**
 *  注册按钮
 */
@property (nonatomic, strong) UIButton *registerButton;

@end

@implementation RegisterViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view.
    
    
    self.navigationItem.title = @"注册";
    self.view.backgroundColor = [UIColor purpleColor];
    
    
    // 页面布局
    [self initLayout];
    
    
    // 设置代理
    [[XMPPManager shareManager].xmppStream addDelegate:self delegateQueue:dispatch_get_main_queue()];
    
    
    // 注册按钮的点击事件
    [_registerButton addTarget:self action:@selector(registerClick:) forControlEvents:UIControlEventTouchUpInside];
    
}


#pragma mark - 注册按钮点击事件
- (void)registerClick:(UIButton *)sender {
    
    [[XMPPManager shareManager] registerWithUserName:self.userTextField.text password:self.passwordTextField.text];
}


#pragma mark - XMPPStreamDelegate实现协议方法
// 实现协议是为了实现需求：注册成功之后dismiss到登录界面
// 注册成功
- (void)xmppStreamDidRegister:(XMPPStream *)sender {
    
    NSLog(@"注册成功");
    [self.navigationController popViewControllerAnimated:YES];
}


// 注册失败
- (void)xmppStream:(XMPPStream *)sender didNotRegister:(DDXMLElement *)error {
    
    NSLog(@"注册失败 = %@", error);
}


#pragma mark - 布局页面
- (void)initLayout {
    
    // 创建子控件
    _userTextField = [[UITextField alloc] init];
    _userTextField.borderStyle = UITextBorderStyleRoundedRect;
    _userTextField.layer.cornerRadius = 5;
    _userTextField.backgroundColor = [UIColor whiteColor];
    _userTextField.placeholder = @"请输入用户名";
    [self.view addSubview:_userTextField];
    
    _passwordTextField = [[UITextField alloc] init];
    _passwordTextField.borderStyle = UITextBorderStyleRoundedRect;
    _passwordTextField.layer.cornerRadius = 5;
    _passwordTextField.backgroundColor = [UIColor whiteColor];
    _passwordTextField.placeholder = @"请输入密码";
    [self.view addSubview:_passwordTextField];
    
    _registerButton = [UIButton buttonWithType:UIButtonTypeSystem];
    _registerButton.layer.cornerRadius = 5;
    [_registerButton setTitle:@"注   册" forState:UIControlStateNormal];
    [_registerButton setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
    _registerButton.backgroundColor = [UIColor whiteColor];
    [self.view addSubview:_registerButton];
    
    
    // 设置frame
    [_userTextField mas_makeConstraints:^(MASConstraintMaker *make) {
        
        make.top.offset(120);
        make.left.offset(50);
        make.right.offset(-50);
        make.height.mas_equalTo(50);
        
    }];
    
    [_passwordTextField mas_makeConstraints:^(MASConstraintMaker *make) {
        
        make.top.equalTo(_userTextField.mas_bottom).offset(50);
        make.left.offset(50);
        make.right.offset(-50);
        make.height.mas_equalTo(50);
        
    }];
    
    [_registerButton mas_makeConstraints:^(MASConstraintMaker *make) {
        
        make.top.equalTo(_passwordTextField.mas_bottom).offset(50);
        make.left.offset(150);
        make.right.offset(-150);
        make.height.mas_equalTo(50);
        
    }];
}

@end

RosterTableViewController.m

#import "RosterTableViewController.h"
#import "XMPPManager.h"
#import "ChatTableViewController.h"

@interface RosterTableViewController () <XMPPStreamDelegate, XMPPRosterDelegate>

/**
 *  存储好友列表的数组
 */
@property (nonatomic, strong) NSMutableArray *allRosterArray;

/**
 *  用来存储发送请求者的JID
 */
@property (nonatomic, strong) XMPPJID *fromJID;


@end

@implementation RosterTableViewController

// 懒加载
- (NSMutableArray *)allRosterArray {
    
    if (!_allRosterArray) {
        _allRosterArray = [NSMutableArray array];
    }
    return _allRosterArray;
}


- (void)viewDidLoad {
    [super viewDidLoad];
    
    
    self.navigationItem.title = @"好友列表";
    
    
    // 设置代理
    [[XMPPManager shareManager].xmppStream addDelegate:self delegateQueue:dispatch_get_main_queue()];
    [[XMPPManager shareManager].xmppRoster addDelegate:self delegateQueue:dispatch_get_main_queue()];
    
    
    // 注册cell
    [self.tableView registerClass:[UITableViewCell class] forCellReuseIdentifier:@"cell"];
    
    
    // 设置添加按钮和返回按钮
    self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAdd target:self action:@selector(addFriendAction:)];
    self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemCancel target:self action:@selector(cancelAction:)];
    
}


#pragma mark - 添加和注销按钮的实现
// 添加按钮的方法实现
- (void)addFriendAction:(UIBarButtonItem *)sender {
    
    [[XMPPManager shareManager] addFriend];
}

// 注销按钮的方法实现
- (void)cancelAction:(UIBarButtonItem *)sender {
    
    [self.navigationController popViewControllerAnimated:YES];
}


#pragma mark - 设置cell
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {

    return self.allRosterArray.count;
}


- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"cell" forIndexPath:indexPath];
    // 根据情况分析，合理添加判断
    if (self.allRosterArray.count > 0) {
        //获取用户
        XMPPJID *jid = self.allRosterArray[indexPath.row];
        cell.textLabel.text = jid.user;
    }
    
    return cell;
}


#pragma mark - 编辑页面（删除）
- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath {
    
    return YES;
}


- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath {
    if (editingStyle == UITableViewCellEditingStyleDelete) {
        // 处理要删除的数据
        // 要删除用户的jid
        XMPPJID *jid = self.allRosterArray[indexPath.row];
        [[XMPPManager shareManager] removeFriendWithName:jid.user];
        [self.allRosterArray removeObjectAtIndex:indexPath.row];
        [tableView deleteRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationFade];
    }
}


#pragma mark - XMPPRosterDelegate代理方法
// 开始获取好友
- (void)xmppRosterDidBeginPopulating:(XMPPRoster *)sender {
    
    NSLog(@"开始获取好友");
}

// 结束获取好友
- (void)xmppRosterDidEndPopulating:(XMPPRoster *)sender {
    
    // 当前页面适用于显示好友列表的，所以在结束好友获取的代理方法中要进行刷新页面，然后将数据显示
    // 刷新页面
    [self.tableView reloadData];
}


// 接收好友的信息
// 这个代理方法会被执行多次，每添加完好友，相应的好友信息都需要反馈
- (void)xmppRoster:(XMPPRoster *)sender didReceiveRosterItem:(DDXMLElement *)item {
    
    /*
     both 互为好友
     none 互不为好友
     to 我已添加对方为好友，但是对方还没有接收
     from 对方已添加自己为好友，但是自己还没有接收
     remove 曾经删除的好友
     */
    // 描述自己和对方之间的关系
    NSString *description = [[item attributeForName:@"subscription"] stringValue];
    NSLog(@"description = %@", description);
    
    if ([description isEqualToString:@"none"] || [description isEqualToString:@"to"] || [description isEqualToString:@"from"] || [description isEqualToString:@"both"]) {
        
        // 添加好友
        // 获取要添加好友的JID
        NSString *friendJID = [[item attributeForName:@"jid"] stringValue];
        XMPPJID *jid = [XMPPJID jidWithString:friendJID];
        
        // 如果数组中含有这个用户就不用进行接下来的操作
        if ([self.allRosterArray containsObject:jid]) {
            return;
        }
        
        // 添加好友到数组中
        [self.allRosterArray addObject:jid];
        
        // 在tableView中添加这条数据
        NSIndexPath *indexPath = [NSIndexPath indexPathForItem:self.allRosterArray.count - 1 inSection:0];
        [self.tableView insertRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationRight];
    }
}


// 对方好友是同意还是拒绝
- (void)xmppRoster:(XMPPRoster *)sender didReceivePresenceSubscriptionRequest:(XMPPPresence *)presence {
    
    self.fromJID = presence.from;
    // 需要相关的提醒框去确定是否接受
    
    UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"好友请求" message:@"是否接受好友请求" preferredStyle:UIAlertControllerStyleAlert];
    
    __weak typeof(self)weakSelf = self;
    UIAlertAction *action1 = [UIAlertAction actionWithTitle:@"接受" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
        // 在花名册中去接受好友
        [[XMPPManager shareManager].xmppRoster acceptPresenceSubscriptionRequestFrom:weakSelf.fromJID andAddToRoster:YES];
    }];
    UIAlertAction *action2 = [UIAlertAction actionWithTitle:@"拒绝" style:UIAlertActionStyleCancel handler:^(UIAlertAction * _Nonnull action) {
        // 在花名册中拒绝好友
        [[XMPPManager shareManager].xmppRoster rejectPresenceSubscriptionRequestFrom:weakSelf.fromJID];
    }];
    
    [alertController addAction:action1];
    [alertController addAction:action2];
    
    [self presentViewController:alertController animated:YES completion:^{
        
    }];
}


#pragma mark - XMPPStreamDelegate代理方法
// 获取好友是否在线
- (void)xmppStream:(XMPPStream *)sender didReceivePresence:(XMPPPresence *)presence {
    
    NSLog(@"status = %@", presence.status);
    
    NSString *type = presence.type;
    NSString *presenceOfUser = presence.to.user;
    
    // 判断当前用户是否为你的好友
    if ([presenceOfUser isEqualToString:[sender myJID].user]) {
        if ([type isEqualToString:@"avaialble"]) {
            NSLog(@"该用户处于上线状态");
        } else if([type isEqualToString:@"uianaialble"]) {
            NSLog(@"该用户处于下线状态");
        }
    }
    
}


#pragma mark - 点击cell进入聊天界面
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
    
    ChatTableViewController *chatVC = [[ChatTableViewController alloc] init];
    XMPPJID *jid = self.allRosterArray[indexPath.row];
    
    chatVC.chatToJID = jid;
    [self.navigationController pushViewController:chatVC animated:YES];
}

@end

ChatTableViewController.h

#import <UIKit/UIKit.h>
#import "XMPPManager.h"

@interface ChatTableViewController : UITableViewController

/**
 *  当前和谁进行聊天
 */
@property (nonatomic, strong) XMPPJID *chatToJID;

@end

ChatTableViewController.m

#import "ChatTableViewController.h"
#import "ChatCell.h"

@interface ChatTableViewController () <XMPPStreamDelegate>

/**
 *  存储消息
 */
@property (nonatomic, strong) NSMutableArray *allMessageArray;

@end

@implementation ChatTableViewController

// 懒加载
- (NSMutableArray *)allMessageArray {
    
    if (!_allMessageArray) {
        _allMessageArray = [NSMutableArray array];
    }
    return _allMessageArray;
}


- (void)viewDidLoad {
    [super viewDidLoad];
    
    // 隐藏tableView每一行的线
    self.tableView.separatorStyle = UITableViewCellSeparatorStyleNone;
    
    
    // 设置代理
    [[XMPPManager shareManager].xmppStream addDelegate:self delegateQueue:dispatch_get_main_queue()];
    
    
    // 获取显示消息的方法
    [self showMessage];
    
    
    // 注册cell
    [self.tableView registerClass:[ChatCell class] forCellReuseIdentifier:@"cell"];
    
    
    // 写两个按钮，一个用于发送，一个用于取消
    self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"发送" style:UIBarButtonItemStylePlain target:self action:@selector(sureAction)];
    self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"取消" style:UIBarButtonItemStylePlain target:self action:@selector(cancelAction)];
}


#pragma mark - 按钮的发送方法和取消方法
// 发送方法
- (void)sureAction {
    
    // 设置message的body
    XMPPMessage *message = [XMPPMessage messageWithType:@"chat" to:self.chatToJID];
    
    [message addBody:@"我爱你"];
    
    // 通过通道进行消息发送
    [[XMPPManager shareManager].xmppStream sendElement:message];
}

// 取消方法
- (void)cancelAction {
    
    [self.navigationController popViewControllerAnimated:YES];
}


#pragma mark - 显示消息
- (void)showMessage {
    
    // 获取管理上下文
    NSManagedObjectContext *context = [XMPPManager shareManager].context;
    
    // 初始化请求对象
    NSFetchRequest *request = [[NSFetchRequest alloc] init];
    
    // 获取实体
    NSEntityDescription *entity = [NSEntityDescription entityForName:@"XMPPMessageArchiving_Message_CoreDataObject" inManagedObjectContext:context];
    
    // 设置查询请求的实体
    [request setEntity:entity];
    
    // 设置谓词查询(当前用户的JID，对方用户的JID)
    NSPredicate *predicate = [NSPredicate predicateWithFormat:@"streamBareJidStr == %@ AND bareJidStr == %@",[XMPPManager shareManager].xmppStream.myJID.bare,self.chatToJID.bare];
    
    [request setPredicate:predicate];
    
    // 按照时间顺序进行排列
    NSSortDescriptor *sort = [[NSSortDescriptor alloc] initWithKey:@"timestamp" ascending:YES];
    
    // 设置排序
    [request setSortDescriptors:@[sort]];
    
    // 执行相关的操作
    NSArray *resultArray = [context executeFetchRequest:request error:nil];
    
    // 先清空消息数组
    [self.allMessageArray removeAllObjects];
    
    // 在进行添加context执行的结果数组
    [self.allMessageArray addObjectsFromArray:resultArray];
    
    // 刷新UI
    [self.tableView reloadData];
    
    // 当前聊天记录跳到最后一行
    if (self.allMessageArray.count > 0) {
        NSIndexPath * indexPath = [NSIndexPath indexPathForRow:self.allMessageArray.count-1 inSection:0];
        // 跳到最后一行
        [self.tableView selectRowAtIndexPath:indexPath animated:YES scrollPosition:UITableViewScrollPositionBottom];
    }
}


#pragma mark - 设置cell
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
    
    return 1;
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
    
    return self.allMessageArray.count;
}


- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    
    ChatCell *cell = [tableView dequeueReusableCellWithIdentifier:@"cell" forIndexPath:indexPath];
    
    // 千万要记住数组里存储的message对象是XMPPMessageArchiving_Message_CoreDataObject类型的
    XMPPMessageArchiving_Message_CoreDataObject *message = [self.allMessageArray objectAtIndex:indexPath.row];
    
    // 设置cell的相关数据
    cell.isOut = message.isOutgoing;
    cell.message = message.body;
    
    
    return cell;
}


// 设置cell高度
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath {
    
    return 70;
}


#pragma mark - XMPPStreamDelegate的相关代理方法
// 发送消息成功
- (void)xmppStream:(XMPPStream *)sender didSendMessage:(XMPPMessage *)message {
    
    // 重新显示相关信息
    [self showMessage];
}

// 接受消息成功
- (void)xmppStream:(XMPPStream *)sender didReceiveMessage:(XMPPMessage *)message {
    
    // 重新显示相关信息
    [self showMessage];
}


// 发送消息失败
- (void)xmppStream:(XMPPStream *)sender didFailToSendMessage:(XMPPMessage *)message error:(NSError *)error {
    
    NSLog(@"发送消息失败");
}

@end

ChatCell.h

#import <UIKit/UIKit.h>

@interface ChatCell : UITableViewCell

/**
 *  判断是对方发送过来的消息，还是自己发出的消息
 */
@property (nonatomic, assign) BOOL isOut;

/**
 *  消息内容
 */
@property (nonatomic, strong) NSString *message;

@end

ChatCell.m

#import "ChatCell.h"

@interface ChatCell ()

@property(nonatomic,strong)UIImageView * headerImageView;
@property(nonatomic,strong)UIImageView * backgroundImageView;

/**
 *  显示每一条聊天内容
 */
@property(nonatomic,strong)UILabel * contentLabel;

@end


@implementation ChatCell

//使用懒加载创建并初始化所有UI控件
- (UILabel *)contentLabel{
    if (_contentLabel == nil) {
        _contentLabel = [[UILabel alloc] init];
    }
    return _contentLabel;
}
- (UIImageView *)backgroundImageView
{
    if (_backgroundImageView == nil) {
        _backgroundImageView = [[UIImageView alloc] init];
    }
    return _backgroundImageView;
}
- (UIImageView *)headerImageView
{
    if (_headerImageView == nil) {
        _headerImageView = [[UIImageView alloc] init];
    }
    return _headerImageView;
}


- (instancetype)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier{
    self = [super initWithStyle:style reuseIdentifier:reuseIdentifier];
    if (self) {
        //设置cell不能选中
        self.selectionStyle = UITableViewCellSelectionStyleNone;
        
        [self.contentView addSubview:self.backgroundImageView];
        [self.contentView addSubview:self.headerImageView];
        [self.backgroundImageView addSubview:self.contentLabel];
    }
    return self;
}


//重写isOut的setter方法，来设定cell上的不同布局
- (void)setIsOut:(BOOL)isOut
{
    _isOut = isOut;
    CGRect rect = self.frame;
    if (_isOut) {
        self.headerImageView.frame = CGRectMake(rect.size.width-50, 10, 50, 50);
        self.headerImageView.image = [UIImage imageNamed:@"xiaoming"];
    }else{
        self.headerImageView.frame = CGRectMake(0, 10, 50, 50);
        self.headerImageView.image = [UIImage imageNamed:@"angel"];
    }
}


//重写message方法，在cell上显示聊天记录
- (void)setMessage:(NSString *)message
{
    if (_message != message) {
        _message = message;
        self.contentLabel.text = _message;
        //        self.contentLabel.numberOfLines = 0;
        [self.contentLabel sizeToFit];
        
        CGRect rect = self.frame;
        if (self.isOut) {//发出去的
            self.backgroundImageView.image = [[UIImage imageNamed:@"chat_to"] stretchableImageWithLeftCapWidth:45 topCapHeight:40];
            self.backgroundImageView.frame = CGRectMake(rect.size.width - self.contentLabel.frame.size.width - 50-20, 10, self.contentLabel.frame.size.width+20, rect.size.height-20);
        }else{//接收的
            self.backgroundImageView.image = [[UIImage imageNamed:@"chat_from"] stretchableImageWithLeftCapWidth:45 topCapHeight:40];
            self.backgroundImageView.frame = CGRectMake(50, 10,self.contentLabel.frame.size.width+40, rect.size.height-20);
        }
        //因为contentLabel已经自适应文字大小，故不用设置宽高，但需要设置位置
        self.contentLabel.center = CGPointMake(self.backgroundImageView.frame.size.width/2.0, self.backgroundImageView.frame.size.height/2.0);
        
    }
}

@end