即时通讯之XMPP好友列表、添加好友、获取会话内容、简单聊天

 1 #pragma mark - 管理好友
 2         // 获取管理好友的单例对象
 3         XMPPRosterCoreDataStorage *rosterStorage = [XMPPRosterCoreDataStorage sharedInstance];
 4         // 用管理好友的单例对象初始化Roster花名册
 5         // 好友操作是耗时操作
 6         self.xmppRoster = [[XMPPRoster alloc] initWithRosterStorage:rosterStorage dispatchQueue:dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0)];
 7         // 在通道中激活xmppRoster
 8         [self.xmppRoster activate:self.xmppStream];
 9         // 设置代理
10         [self.xmppRoster addDelegate:self delegateQueue:dispatch_get_main_queue()];

1 #pragma mark - 添加好友
2 - (void)addFriend;
3 
4 #pragma mark - 删除好友
5 - (void)removeFriendWithName:(NSString *)userName;
6 
7 #pragma mark - 手动断开连接(注销)
8 - (void)disconnectionToServer;

  1 /// 接收要添加好友的名字
  2 @property (nonatomic, strong) UITextField *addText;
  3 
  4 #pragma mark - 重写初始化方法
  5 - (instancetype)init {
  6     if (self = [super init]) {
  7 #pragma mark - 创建通道
  8         // 初始化通道对象
  9         self.xmppStream = [[XMPPStream alloc] init];
 10         // 设置Openfire服务器主机名
 11         self.xmppStream.hostName = kHostName;
 12         // 设置服务器端口号
 13         self.xmppStream.hostPort = kHostPort;
 14         // 设置代理
 15         [self.xmppStream addDelegate:self delegateQueue:dispatch_get_main_queue()];
 16         
 17 #warning -----------------以下是该方法中新增加的代码-----------------------
 18 #pragma mark - 管理好友
 19         // 获取管理好友的单例对象
 20         XMPPRosterCoreDataStorage *rosterStorage = [XMPPRosterCoreDataStorage sharedInstance];
 21         // 用管理好友的单例对象初始化Roster花名册
 22         // 好友操作是耗时操作
 23         self.xmppRoster = [[XMPPRoster alloc] initWithRosterStorage:rosterStorage dispatchQueue:dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0)];
 24         // 在通道中激活xmppRoster
 25         [self.xmppRoster activate:self.xmppStream];
 26         // 设置代理
 27         [self.xmppRoster addDelegate:self delegateQueue:dispatch_get_main_queue()];
 28         
 29 #warning -----------------以上是该方法中新增加的代码-----------------------
 30 
 31     }
 32     return self;
 33 }
 34 
 35 #pragma mark -----------------以下是管理好友列表----------------
 36 #pragma mark - 添加好友
 37 - (void)addFriend {
 38     NSLog(@"manager - 添加好友 %d", __LINE__);
 39     UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"添加好友" message:@"请输入要添加好友的名字" preferredStyle:UIAlertControllerStyleAlert];
 40     __weak typeof(self)weakSelf = self;
 41     [alertController addTextFieldWithConfigurationHandler:^(UITextField * _Nonnull textField) {
 42         // 接收输入的好友名字
 43         weakSelf.addText = textField;
 44     }];
 45     UIAlertAction *cancleAction = [UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleCancel handler:nil];
 46     UIAlertAction *sureAction = [UIAlertAction actionWithTitle:@"确定" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
 47         NSLog(@"======%@", weakSelf.addText.text);
 48         // 使用JID记录
 49         XMPPJID *addJID = [XMPPJID jidWithUser:weakSelf.addText.text domain:kDomin resource:kResource];
 50         // 监听好友的动作
 51         [weakSelf.xmppRoster subscribePresenceToUser:addJID];
 52         // 添加好友
 53         [weakSelf.xmppRoster addUser:addJID withNickname:weakSelf.addText.text];
 54     }];
 55     [alertController addAction:sureAction];
 56     [alertController addAction:cancleAction];
 57     [[self getCurrentVC ]presentViewController:alertController animated:YES completion:nil];
 58 }
 59 
 60 #pragma mark - 删除好友
 61 - (void)removeFriendWithName:(NSString *)userName {
 62     NSLog(@"manager删除好友 %d", __LINE__);
 63     // 使用JID记录要删除的用户名
 64     XMPPJID *removeJID = [XMPPJID jidWithUser:userName domain:kDomin resource:kResource];
 65     // 停止监听好友
 66     [self.xmppRoster unsubscribePresenceFromUser:removeJID];
 67     // 删除好友
 68     [self.xmppRoster removeUser:removeJID];
 69 }
 70 #pragma mark - 获取当前屏幕显示的viewcontroller
 71 - (UIViewController *)getCurrentVC
 72 {
 73     UIViewController *result = nil;
 74     
 75     UIWindow * window = [[UIApplication sharedApplication] keyWindow];
 76     if (window.windowLevel != UIWindowLevelNormal)
 77     {
 78         NSArray *windows = [[UIApplication sharedApplication] windows];
 79         for(UIWindow * tmpWin in windows)
 80         {
 81             if (tmpWin.windowLevel == UIWindowLevelNormal)
 82             {
 83                 window = tmpWin;
 84                 break;
 85             }
 86         }
 87     }
 88     
 89     UIView *frontView = [[window subviews] objectAtIndex:0];
 90     id nextResponder = [frontView nextResponder];
 91     
 92     if ([nextResponder isKindOfClass:[UIViewController class]])
 93         result = nextResponder;
 94     else
 95         result = window.rootViewController;
 96     
 97     return result;
 98 }

  1 #import "RosterListTableViewController.h"
  2 #import "XMPPManager.h"
  3 #import "ChatTableViewController.h"
  4 
  5 @interface RosterListTableViewController ()<XMPPRosterDelegate, XMPPStreamDelegate>
  6 
  7 /// 好友列表
  8 @property (nonatomic, strong) NSMutableArray *allRosterArray;
  9 /// 用来存储发送好友请求者的JID
 10 @property (nonatomic, strong) XMPPJID *fromJID;
 11 
 12 @end
 13 
 14 @implementation RosterListTableViewController
 15 
 16 - (void)viewDidLoad {
 17     [super viewDidLoad];
 18     // 初始化数组
 19     self.allRosterArray = [NSMutableArray array];
 20     
 21     [[XMPPManager sharedXMPPManager].xmppStream addDelegate:self delegateQueue:dispatch_get_main_queue()];
 22     [[XMPPManager sharedXMPPManager].xmppRoster addDelegate:self delegateQueue:dispatch_get_main_queue()];
 23     self.title = @"好友列表";
 24     
 25     // 添加按钮
 26     self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAdd target:self action:@selector(addFriendAction)];
 27     // 返回按钮
 28     self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"注销" style:UIBarButtonItemStylePlain target:self action:@selector(cancleAction)];
 29     
 30     [self.tableView registerClass:[UITableViewCell class] forCellReuseIdentifier:@"RosterCell"];
 31 
 32 }
 33 
 34 
 35 #pragma mark - 添加好友按钮点击事件
 36 - (void)addFriendAction {
 37     
 38     [[XMPPManager sharedXMPPManager] addFriend];
 39 }
 40 
 41 #pragma mark - 注销按钮点击事件
 42 - (void)cancleAction {
 43     // 注销
 44     [[XMPPManager sharedXMPPManager] disconnectionToServer];
 45     [self.navigationController popViewControllerAnimated:YES];
 46 }
 47 
 48 #pragma mark - Table view data source
 49 
 50 - (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
 51     return 1;
 52 }
 53 
 54 - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
 55     return self.allRosterArray.count;
 56 }
 57 
 58 
 59 - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
 60     UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"RosterCell" forIndexPath:indexPath];
 61     
 62     // 根据项目情况分析，合理添加判断
 63     if (self.allRosterArray.count > 0) {
 64         // 获取用户
 65         XMPPJID *jid = [self.allRosterArray objectAtIndex:indexPath.row];
 66         cell.textLabel.text = jid.user;
 67         NSLog(@"bare %@", jid.bare);
 68     }
 69     
 70     return cell;
 71 }
 72 
 73 
 74 - (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath {
 75     return YES;
 76 }
 77 
 78 - (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath {
 79     if (editingStyle == UITableViewCellEditingStyleDelete) {
 80         // 删除一个好友
 81         XMPPJID *jid = self.allRosterArray[indexPath.row];
 82         // 根据名字删除好友
 83         [[XMPPManager sharedXMPPManager] removeFriendWithName:jid.user];
 84         // 从数组中移除
 85         [self.allRosterArray removeObjectAtIndex:indexPath.row];
 86         [tableView deleteRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationFade];
 87     } else if (editingStyle == UITableViewCellEditingStyleInsert) {
 88     
 89     }   
 90 }
 91 
 92 #pragma mark - 点击cell进入聊天界面
 93 - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
 94     ChatTableViewController *chatTVC = [[ChatTableViewController alloc] initWithStyle:UITableViewStylePlain];
 95     // 将当前好友的JID传到聊天界面
 96     chatTVC.chatWithJID = self.allRosterArray[indexPath.row];
 97     [self.navigationController pushViewController:chatTVC animated:YES];
 98 }
 99 
100 #pragma mark - ----------------XMPPRosterDelegate代理方法----------------
101 #pragma mark - 开始获取好友
102 - (void)xmppRosterDidBeginPopulating:(XMPPRoster *)sender {
103     NSLog(@"listTVC 开始获取好友 %d", __LINE__);
104 }
105 
106 #pragma mark - 结束获取好友
107 - (void)xmppRosterDidEndPopulating:(XMPPRoster *)sender {
108     NSLog(@"listTVC 获取好友结束 %d", __LINE__);
109     // 当前页面是用于显示好友列表的，所以在结束获取好友的代理方法中要进行页面刷新页面，然后将数据显示。
110     // 刷新UI
111     [self.tableView reloadData];
112 }
113 
114 #pragma mark - 接收好友信息
115 
116 // 获取好友列表时会执行多次，每次获取一个好友信息并将该好友信息添加到数组中
117 // 发送完添加好友请求会执行
118 // 同意别人的好友请求会执行
119 // 删除好友时会执行
120 - (void)xmppRoster:(XMPPRoster *)sender didReceiveRosterItem:(DDXMLElement *)item {
121     NSLog(@"listTVC 接收好友信息 %d", __LINE__);
122     /**
123      *  好友信息状态有5种
124         both - 互为好友
125         none - 互不为好友
126         to - 请求添加对方为好友，对方还没有同意
127         from - 对方添加我为好友，自己还没有同意
128         remove - 曾经删除的好友
129      */
130     
131     // 自己和对方之间的关系
132     NSString *description = [[item attributeForName:@"subscription"] stringValue];
133     NSLog(@"关系%@", description);
134 
135     // 显示我的好友
136     if ([description isEqualToString:@"both"]) {
137         // 添加好友
138         // 获取好友的JID
139         NSString *friendJID = [[item attributeForName:@"jid"] stringValue];
140         XMPPJID *jid = [XMPPJID jidWithString:friendJID];
141         // 如果数组中含有这个用户，那么不添加进数组
142         if ([self.allRosterArray containsObject:jid]) {
143             NSLog(@"已经有该好友");
144             return;
145         }
146         // 添加好友到数组中
147         [self.allRosterArray addObject:jid];
148 
149         // 在TableView的最后一个cell下面添加这条数据
150         NSIndexPath *indexPath = [NSIndexPath indexPathForItem:self.allRosterArray.count - 1 inSection:0];
151         [self.tableView insertRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationLeft];
152     }
153 }
154 
155 #pragma mark - 接收到添加好友的请求，选择接受or拒绝
156 - (void)xmppRoster:(XMPPRoster *)sender didReceivePresenceSubscriptionRequest:(XMPPPresence *)presence {
157     NSLog(@"listTVC 接收添加好友的请求 %d", __LINE__);
158     self.fromJID = presence.from;
159     // 需要相关的提醒框去确定是否接受好友请求
160     UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"请求添加好友" message:@"是否同意" preferredStyle:UIAlertControllerStyleAlert];
161     __weak typeof(self)weakSelf = self;
162     UIAlertAction *acceptAction = [UIAlertAction actionWithTitle:@"同意" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
163         // 添加到花名册
164         [[XMPPManager sharedXMPPManager].xmppRoster acceptPresenceSubscriptionRequestFrom:weakSelf.fromJID andAddToRoster:YES];
165     }];
166     UIAlertAction *rejectAction = [UIAlertAction actionWithTitle:@"拒绝" style:UIAlertActionStyleCancel handler:^(UIAlertAction * _Nonnull action) {
167         [[XMPPManager sharedXMPPManager].xmppRoster rejectPresenceSubscriptionRequestFrom:weakSelf.fromJID];
168     }];
169     [alertController addAction:acceptAction];
170     [alertController addAction:rejectAction];
171     [self presentViewController:alertController animated:YES completion:nil];
172 }
173 
174 #pragma mark - ----------------XMPPStreamDelegate代理方法----------------
175 #pragma mark - 判断好友是否处于上线状态
176 - (void)xmppStream:(XMPPStream *)sender didReceivePresence:(XMPPPresence *)presence {
177     NSLog(@"listTVC 判断好友是否处于上线状态 %@ %d", presence.status, __LINE__);
178     NSString *type = presence.type;
179     NSString *presenceUser = presence.to.user;
180     // 判断当前用户是否为好友
181     if ([presenceUser isEqualToString:[sender myJID].user]) {
182         if ([type isEqualToString:@"available"]) {
183             NSLog(@"该用户处于上线状态");
184         } else if ([type isEqualToString:@"unavailable"]) {
185             NSLog(@"该用户处于下线状态");
186         }
187     }
188 }
189 
190 @end

 1 #pragma mark - 初始化消息归档
 2         // 获取管理消息的存储对象
 3         XMPPMessageArchivingCoreDataStorage *storage = [XMPPMessageArchivingCoreDataStorage sharedInstance];
 4         // 进行消息管理器的初始化
 5         self.xmppMessageArchiving = [[XMPPMessageArchiving alloc] initWithMessageArchivingStorage:storage dispatchQueue:dispatch_get_main_queue()];
 6         // 在通道中激活xmppMessageArchiving
 7         [self.xmppMessageArchiving activate:self.xmppStream];
 8         // 设置代理
 9         [self.xmppMessageArchiving addDelegate:self delegateQueue:dispatch_get_main_queue()];
10         // 设置管理上下文 （此时不再从AppDelegate获取）
11         self.context = storage.mainThreadManagedObjectContext;

1 /// 和聊天相关的属性，消息归档
2 @property (nonatomic, strong) XMPPMessageArchiving *xmppMessageArchiving;
3 /// 管理数据库上下文
4 @property (nonatomic, strong) NSManagedObjectContext *context;

#pragma mark - 重写初始化方法
- (instancetype)init {
    if (self = [super init]) {
#pragma mark - 创建通道
        // 初始化通道对象
        self.xmppStream = [[XMPPStream alloc] init];
        // 设置Openfire服务器主机名
        self.xmppStream.hostName = kHostName;
        // 设置服务器端口号
        self.xmppStream.hostPort = kHostPort;
        // 设置代理
        [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];
        // 用管理好友的单例对象初始化Roster花名册
        // 好友操作是耗时操作
        self.xmppRoster = [[XMPPRoster alloc] initWithRosterStorage:rosterStorage dispatchQueue:dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0)];
        // 在通道中激活xmppRoster
        [self.xmppRoster activate:self.xmppStream];
        // 设置代理
        [self.xmppRoster addDelegate:self delegateQueue:dispatch_get_main_queue()];
        
#warning -----------------以下是该方法中新增加的代码-----------------------
#pragma mark - 初始化管理归档
        // 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.xmppMessageArchiving = [[XMPPMessageArchiving alloc] initWithMessageArchivingStorage:storage dispatchQueue:dispatch_get_main_queue()];
        // 在通道中激活xmppMessageArchiving
        [self.xmppMessageArchiving activate:self.xmppStream];
        // 设置代理
        [self.xmppMessageArchiving addDelegate:self delegateQueue:dispatch_get_main_queue()];
        // 设置管理上下文 （此时不再从AppDelegate获取）
        self.context = storage.mainThreadManagedObjectContext;
#warning -----------------以上是该方法中新增加的代码-----------------------
    }
    return self;
}

1 #pragma mark - 点击cell进入聊天界面
2 - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
3     ChatTableViewController *chatTVC = [[ChatTableViewController alloc] initWithStyle:UITableViewStylePlain];
4     // 将当前好友的JID传到聊天界面
5     chatTVC.chatWithJID = self.allRosterArray[indexPath.row];
6     [self.navigationController pushViewController:chatTVC animated:YES];
7 }

1 #import <UIKit/UIKit.h>
2 #import "XMPPManager.h"
3 
4 @interface ChatTableViewController : UITableViewController
5 /// 当前和谁在聊天
6 @property (nonatomic, strong) XMPPJID *chatWithJID;
7 @end

  1 #import "ChatTableViewController.h"
  2 #import "ChatTableViewCell.h"
  3 
  4 @interface ChatTableViewController ()<XMPPStreamDelegate>
  5 @property (nonatomic, strong) NSMutableArray *allMessageArray;
  6 @end
  7 
  8 @implementation ChatTableViewController
  9 
 10 - (void)viewDidLoad {
 11     [super viewDidLoad];
 12     self.allMessageArray = [NSMutableArray array];
 13     // 隐藏分割线
 14     self.tableView.separatorStyle = UITableViewCellSeparatorStyleNone;
 15     // 注册cell
 16     [self.tableView registerClass:[ChatTableViewCell class] forCellReuseIdentifier:@"chatCell"];
 17     // 发送按钮
 18     self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"取消" style:UIBarButtonItemStylePlain target:self action:@selector(cancelAction)];
 19     // 取消按钮 20     self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"发送" style:UIBarButtonItemStylePlain target:self action:@selector(sendMessageAction)];
 21     [[XMPPManager sharedXMPPManager].xmppStream addDelegate:self delegateQueue:dispatch_get_main_queue()];
 22 
 23     // 获取显示消息的方法
 24     [self showMessage];
 25     
 26 }
 27 
 28 #pragma mark - 取消按钮点击事件
 29 - (void)cancelAction {
 30     // 返回上一界面
 31     [self.navigationController popViewControllerAnimated:YES];
 32 }
 33 #pragma mark - 发送消息按钮点击事件
 34 - (void)sendMessageAction {
 35     XMPPMessage *message = [XMPPMessage messageWithType:@"chat" to:self.chatWithJID];
 36     // 设置message的body为固定值 (没有实现发送自定义消息)
 37     [message addBody:@"我爱你"];
 38     // 通过通道进行消息发送
 39     [[XMPPManager sharedXMPPManager].xmppStream sendElement:message];
 40 }
 41 
 42 #pragma mark - 显示消息
 43 - (void)showMessage {
 44     // 获取管理对象上下文
 45     NSManagedObjectContext *context = [XMPPManager sharedXMPPManager].context;
 46     // 初始化请求对象
 47     NSFetchRequest *request = [[NSFetchRequest alloc] init];
 48     // 获取实体
 49     NSEntityDescription *entity = [NSEntityDescription entityForName:@"XMPPMessageArchiving_Message_CoreDataObject" inManagedObjectContext:context];
 50     // 设置查询请求的实体
 51     [request setEntity:entity];
 52     // 设置谓词查询 (当前用户的jid，对方用户的jid)  (根据项目需求而定)
 53     request.predicate = [NSPredicate predicateWithFormat:@"streamBareJidStr == %@ AND bareJidStr == %@",[XMPPManager sharedXMPPManager].xmppStream.myJID.bare,self.chatWithJID.bare];
 54     // 按照时间顺序排列
 55     NSSortDescriptor *sort = [[NSSortDescriptor alloc] initWithKey:@"timestamp" ascending:YES];
 56     [request setSortDescriptors:@[sort]];
 57     // 获取到存储在数据库中的聊天记录
 58     NSArray *resultArray = [context executeFetchRequest:request error:nil];
 59     // 先清空消息数组 （根据项目需求而定）
 60     [self.allMessageArray removeAllObjects];
 61     // 将结果数组赋值给消息数组
 62     self.allMessageArray = [resultArray mutableCopy];
 63     // 刷新UI
 64     [self.tableView reloadData];
 65     // 当前聊天记录跳到最后一行
 66     if (self.allMessageArray.count > 0) {
 67         NSIndexPath * indexPath = [NSIndexPath indexPathForRow:self.allMessageArray.count - 1 inSection:0];
 68         // 跳到最后一行
 69         [self.tableView selectRowAtIndexPath:indexPath animated:YES scrollPosition:UITableViewScrollPositionBottom];
 70     }
 71     [context save:nil];
 72 }
 73 
 74 #pragma mark - Table view data source
 75 - (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
 76     return 1;
 77 }
 78 
 79 - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
 80     return self.allMessageArray.count;
 81 }
 82 
 83 
 84 - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
 85     ChatTableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"chatCell" forIndexPath:indexPath];
 86     // 数组里存储的是XMPPMessageArchiving_Message_CoreDataObject对象
 87     XMPPMessageArchiving_Message_CoreDataObject *message = [self.allMessageArray objectAtIndex:indexPath.row];
 88     // 设置cell中的相关数据
 89     // 根据isOutgoing判断是不是对方发送过来的消息 YES - 对方发送的消息， NO - 自己发送给对方的消息
 90     cell.isOut = message.isOutgoing;
 91     cell.message = message.body;
 92     
 93     return cell;
 94 }
 95 
 96 - (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath {
 97     // cell的高度并没有自适应
 98     return 70;
 99 }
100 
101 #pragma mark - ------------XMPPStreamDelegate相关代理------------
102 #pragma mark - 已经发送消息
103 - (void)xmppStream:(XMPPStream *)sender didSendMessage:(XMPPMessage *)message {
104     // 重新对消息进行操作
105     [self showMessage];
106 }
107 #pragma mark - 已经接收消息
108 - (void)xmppStream:(XMPPStream *)sender didReceiveMessage:(XMPPMessage *)message {
109     // 重新对消息进行操作
110     [self showMessage];
111 }
112 
113 #pragma mark - 消息发送失败
114 - (void)xmppStream:(XMPPStream *)sender didFailToSendMessage:(XMPPMessage *)message error:(NSError *)error {
115     NSLog(@"消息发送失败");
116 }
117 
118 @end

#import <UIKit/UIKit.h>

@interface ChatTableViewCell : UITableViewCell
/// 判断是不是对方发送过来的消息 YES - 对方发送的消息， NO - 自己发送给对方的消息
@property (nonatomic, assign) BOOL isOut;
/// 消息内容
@property (nonatomic, copy) NSString *message;
@end

 1 #import "ChatTableViewCell.h"
 2 
 3 @interface ChatTableViewCell ()
 4 /// 头像
 5 @property(nonatomic,strong)UIImageView * headerImageView;
 6 /// 消息框背景
 7 @property(nonatomic,strong)UIImageView * backgroundImageView;
 8 /// 显示每一条聊天内容
 9 @property(nonatomic,strong)UILabel * contentLabel;
10 @end
11 
12 @implementation ChatTableViewCell
13 
14 //使用懒加载创建并初始化所有UI控件
15 - (UILabel *)contentLabel{
16     if (_contentLabel == nil) {
17         _contentLabel = [[UILabel alloc] init];
18     }
19     return _contentLabel;
20 }
21 - (UIImageView *)backgroundImageView
22 {
23     if (_backgroundImageView == nil) {
24         _backgroundImageView = [[UIImageView alloc] init];
25     }
26     return _backgroundImageView;
27 }
28 - (UIImageView *)headerImageView
29 {
30     if (_headerImageView == nil) {
31         _headerImageView = [[UIImageView alloc] init];
32     }
33     return _headerImageView;
34 }
35 
36 
37 - (instancetype)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier{
38     self = [super initWithStyle:style reuseIdentifier:reuseIdentifier];
39     if (self) {
40         //设置cell不能选中
41         self.selectionStyle = UITableViewCellSelectionStyleNone;
42         
43         [self.contentView addSubview:self.backgroundImageView];
44         [self.contentView addSubview:self.headerImageView];
45         [self.backgroundImageView addSubview:self.contentLabel];
46         
47     }
48     return self;
49 }
50 
51 - (void)awakeFromNib {
52     // Initialization code
53     
54     
55 }
56 
57 //重写isOut的setter方法，来设定cell上的不同布局
58 - (void)setIsOut:(BOOL)isOut
59 {
60     _isOut = isOut;
61     CGRect rect = self.frame;
62     if (_isOut) {
63         self.headerImageView.frame = CGRectMake(rect.size.width-50, 10, 50, 50);
64         self.headerImageView.image = [UIImage imageNamed:@"nike"];
65     }else{
66         self.headerImageView.frame = CGRectMake(0, 10, 50, 50);
67         self.headerImageView.image = [UIImage imageNamed:@"keji"];
68     }
69 }
70 //重写message方法，在cell上显示聊天记录
71 - (void)setMessage:(NSString *)message
72 {
73     if (_message != message) {
74         _message = message;
75         self.contentLabel.text = _message;
76         //        self.contentLabel.numberOfLines = 0;
77         [self.contentLabel sizeToFit];
78         
79         CGRect rect = self.frame;
80         if (self.isOut) {//发出去的
81             // 消息气泡
82             self.backgroundImageView.image = [[UIImage imageNamed:@"chat_to"] stretchableImageWithLeftCapWidth:45 topCapHeight:40];
83             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);
84         }else{//接收的
85             self.backgroundImageView.image = [[UIImage imageNamed:@"chat_from"] stretchableImageWithLeftCapWidth:45 topCapHeight:40];
86             self.backgroundImageView.frame = CGRectMake(50, 10,self.contentLabel.frame.size.width+40, rect.size.height-20);
87         }
88         //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
89         self.contentLabel.center = CGPointMake(self.backgroundImageView.frame.size.width/2.0, self.backgroundImageView.frame.size.height/2.0);
90         
91     }
92 }
93 
94 
95 @end