下载iOS_Demo

- (BOOL)application:(UIApplication )application didFinishLaunchingWithOptions:(NSDictionary )launchOptions {
    // Override point for customization after application launch.
    //这里使用的是BmobSDK提供的用户系统，所以需要初始化BmobSDK
    [Bmob registerWithAppKey:@"Application ID"];
    self.sharedIM = [BmobIM sharedBmobIM];
    [self.sharedIM registerWithAppKey:@"Application ID"];
    [UIApplication sharedApplication].statusBarStyle = UIStatusBarStyleLightContent;
    BmobUser user = [BmobUser getCurrentUser];
    //如果有用户了，不需要推送服务来推送消息的话，可以直接连接服务器
    if (user) {
        self.userId = user.objectId;
        [self connectToServer];
    }else{
        //如果用户还未登录，则监听对应的通知，再进行处理
        [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(userLogin:) name:@"Login" object:nil];
        [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(userLogout:) name:@"Logout" object:nil];
    }
    self.sharedIM.delegate = self;
    return YES;
}

-(void)application:(UIApplication )application didFailToRegisterForRemoteNotificationsWithError:(nonnull NSError )error{
    BmobUser user = [BmobUser getCurrentUser];
    if (user) {
        [self connectToServer];
    }
}

-(void)application:(UIApplication )application didRegisterForRemoteNotificationsWithDeviceToken:(NSData )deviceToken{
        BmobUser user = [BmobUser getCurrentUser];
    if (user) {
        //开发者自己将deviceToken转成字符串
        NSString string = [[NSString alloc] initWithData:deviceToken encoding:NSUTF8StringEncoding];
        self.token = [[[string stringByReplacingOccurrencesOfString:@" " withString:@""] stringByReplacingOccurrencesOfString:@"<" withString:@""] stringByReplacingOccurrencesOfString:@">" withString:@""];
        [self connectToServer];
    }
}

-(void)userLogin:(NSNotification )noti{
    NSString userId = noti.object;
    self.userId = userId;
    [self connectToServer];
}

-(void)userLogout:(NSNotification )noti{
    [self.sharedIM disconnect];
}

-(void)connectToServer{
    [self.sharedIM setupBelongId:self.userId];
    [self.sharedIM setupDeviceToken:self.token];
    [self.sharedIM connect];
}

- (void)applicationWillEnterForeground:(UIApplication )application {
    // Called as part of the transition from the background to the inactive state; here you can undo many of the changes made on entering the background.
    if (self.userId && self.userId.length > 0) {
        [self connectToServer];
    }
}

- (void)applicationDidEnterBackground:(UIApplication )application {
    // Use this method to release shared resources, save user data, invalidate timers, and store enough application state information to restore your application to its current state in case it is terminated later.
    // If your application supports background execution, this method is called instead of applicationWillTerminate: when the user quits.
    if ([self.sharedIM isConnected]) {
        [self.sharedIM disconnect];
    }

   if (IS_iOS8) {
        //iOS8推送
        UIMutableUserNotificationCategorycategorys = [[UIMutableUserNotificationCategory alloc]init];
        categorys.identifier=@"BmobIMDemo";
        UIUserNotificationSettingsuserNotifiSetting = [UIUserNotificationSettings settingsForTypes:(UIUserNotificationTypeAlert|UIUserNotificationTypeBadge|UIUserNotificationTypeSound)
                                                                                         categories:[NSSet setWithObjects:categorys,nil]];
        [[UIApplication sharedApplication]registerUserNotificationSettings:userNotifiSetting];
        [[UIApplication sharedApplication]registerForRemoteNotifications];
    }else{
        [application registerForRemoteNotificationTypes:UIRemoteNotificationTypeAlert | UIRemoteNotificationTypeBadge | UIRemoteNotificationTypeSound];
    }

-(void)didGetOfflineMessagesWithIM:(BmobIM )im{
    //获取哪些人的消息还未读
    NSArray objectIds = [self.sharedIM allConversationUsersIds];
    if (objectIds && objectIds.count > 0) {
        //Demo里面的方法去查找服务器相关人物的信息
        [UserService loadUsersWithUserIds:objectIds completion:^(NSArray array, NSError error) {
            if (array && array.count > 0) {
                //保存到本地数据库
                [self.sharedIM saveUserInfos:array];
                //发新用户的通知
                [[NSNotificationCenter defaultCenter] postNotificationName:kNewMessageFromer object:nil];
            }
        }];
    }
}

-(void)didRecieveMessage:(BmobIMMessage )message withIM:(BmobIM )im{
    //查看本地有无这个用户的信息
    BmobIMUserInfo userInfo = [self.sharedIM userInfoWithUserId:message.fromId];
    if (!userInfo) {
          //如果没有则去下载
        [UserService loadUserWithUserId:message.fromId completion:^(BmobIMUserInfo result, NSError error) {
            if (result) {
                //保存到本地数据库
                [self.sharedIM saveUserInfo:result];
                //发新用户的通知
                [[NSNotificationCenter defaultCenter] postNotificationName:kNewMessageFromer object:nil];
            }
            //发接收到新信息的通知
            [[NSNotificationCenter defaultCenter] postNotificationName:kNewMessagesNotifacation object:message];
        }];
    }else{
          //发接收到新信息的通知
        [[NSNotificationCenter defaultCenter] postNotificationName:kNewMessagesNotifacation object:message];
    }
    }

    BmobUser user = [[BmobUser alloc] init];
    user.username = self.usernameTextField.text;
    user.password = self.passwordTextField.text;
    [user signUpInBackgroundWithBlock:^(BOOL isSuccessful, NSError error) {
        if (isSuccessful) {
            [[NSNotificationCenter defaultCenter] postNotificationName:@"Login" object:user.objectId];
            [self dismissViewControllerAnimated:YES completion:nil];
        }else{
            [self showInfomation:error.description];
        }
    }];

    [self showLoading];
    [BmobUser loginWithUsernameInBackground:self.usernameTextField.text password:self.passwordTextField.text block:^(BmobUser user, NSError error) {
        if (user) {
            [self hideLoading];
            [[NSNotificationCenter defaultCenter] postNotificationName:@"Login" object:user.objectId];
            [self dismissViewControllerAnimated:YES completion:nil];
        }else{
            [self showInfomation:error.description];
        }
    }];

-(void)loadUserFriends{
    [UserService friendsWithCompletion:^(NSArray array, NSError error) {
        if (error) {
            [self showInfomation:error.localizedDescription];
        }else{
            BmobUser loginUser = [BmobUser getCurrentUser];
            NSMutableArray result  = [NSMutableArray array];
            for (BmobObject obj in array) {
                BmobUser friend = nil;
                if ([[(BmobUser )[obj objectForKey:@"user"] objectId] isEqualToString:loginUser.objectId]) {
                    friend = [obj objectForKey:@"friendUser"];
                }else{
                    friend = [obj objectForKey:@"user"];
                }
                BmobIMUserInfo info = [BmobIMUserInfo userInfoWithBmobUser:friend];
                [result addObject:info];
            }
            if (result && result.count > 0) {
                [self.userArray setArray:result];
                [self.tableView reloadData];
            }
        }
    }];
}

-(void)addFriend{
    [UserService addFriendNoticeWithUserId:self.userInfo.userId completion:^(BOOL isSuccessful, NSError error) {
        if (error) {
            [self showInfomation:error.localizedDescription];
        }else{
            [self showInfomation:@"已发送添加好友请求"];
        }
    }];
}

//
BmobIMConversation conversation = [BmobIMConversation conversationWithId:self.userInfo.userId conversationType:BmobIMConversationTypeSingle];
conversation.conversationTitle = self.userInfo.name;

-(void)loadMessageRecords{
    NSArray array = [self.conversation queryMessagesWithMessage:nil limit:10];
    if (array && array.count > 0) {
        //排序
        NSArray result = [array sortedArrayUsingComparator:^NSComparisonResult(BmobIMMessage obj1, BmobIMMessage obj2) {
            if (obj1.updatedTime > obj2.updatedTime) {
                return NSOrderedDescending;
            }else if(obj1.updatedTime <  obj2.updatedTime) {
                return NSOrderedAscending;
            }else{
                return NSOrderedSame;
            }
        }];
        [self.messagesArray setArray:result];
        [self.tableView reloadData];
        [self.tableView scrollToRowAtIndexPath:[NSIndexPath indexPathForRow:self.messagesArray.count-1 inSection:0] atScrollPosition:UITableViewScrollPositionBottom animated:YES];
    }
}

-(void)loadMoreRecords{
    if (!self.finished) {
        self.page ++;
        [self.freshControl beginRefreshing];
        if (self.messagesArray.count <= 0) {
            [self.freshControl endRefreshing];
            return;
        }
        BmobIMMessage msg = [self.messagesArray firstObject];
        NSArray array = [self.conversation queryMessagesWithMessage:msg limit:10];
        if (array && array.count > 0) {
            NSMutableArray messages = [NSMutableArray arrayWithArray:self.messagesArray];
            [messages addObjectsFromArray:array];
            //排序
            NSArray result = [messages sortedArrayUsingComparator:^NSComparisonResult(BmobIMMessage obj1, BmobIMMessage obj2) {
                if (obj1.updatedTime > obj2.updatedTime) {
                    return NSOrderedDescending;
                }else if(obj1.updatedTime <  obj2.updatedTime) {
                    return NSOrderedAscending;
                }else{
                    return NSOrderedSame;
                }
            }];
            [self.messagesArray setArray:result];
            [self.tableView reloadData];
        }else{
            self.finished = YES;
            [self showInfomation:@"没有更多的历史消息"];
        }
    }else{
        [self showInfomation:@"没有更多的历史消息"];
    }
    [self.freshControl endRefreshing];
}

-(void)sendTextWithTextField:(UITextField )textField{
    if (textField.text.length == 0) {
        [self showInfomation:@"请输入内容"];
    }else{
        //创建BmobIMTextMessage对象
        BmobIMTextMessage message = [BmobIMTextMessage messageWithText:textField.text attributes:nil];
         //聊天类型设置为单聊
        message.conversationType =  BmobIMConversationTypeSingle;
        message.createdTime = (uint64_t)([[NSDate date] timeIntervalSince1970]  1000);
        message.updatedTime = message.createdTime;
        [self.messagesArray addObject:message];
        [self.tableView reloadData];
        self.bottomView.textField.text = nil;
        [self.tableView scrollToRowAtIndexPath:[NSIndexPath indexPathForRow:self.messagesArray.count-1 inSection:0] atScrollPosition:UITableViewScrollPositionBottom animated:YES];
        __weak typeof(self)weakSelf = self;
        [self.conversation sendMessage:message completion:^(BOOL isSuccessful, NSError error) {
            [weakSelf.tableView reloadRowsAtIndexPaths:@[[NSIndexPath indexPathForRow:self.messagesArray.count-1 inSection:0]] withRowAnimation:UITableViewRowAnimationFade];
        }];
    }
}

+(void)uploadImage:(UIImage )image
        completion:(uploadBlock)block
          progress:(BmobProgressBlock)progressBlock;

[MessageService uploadImage:resizeImage completion:^(BmobIMImageMessage message, NSError error) {
        if (!error) {
            [self.messagesArray addObject:message];
            [self scrollToBottom];
             __weak typeof(self)weakSelf = self;
            [self.conversation sendMessage:message completion:^(BOOL isSuccessful, NSError error) {
                [weakSelf reloadLastRow];
            }];
        }else{
            [self showInfomation:error.localizedDescription];
        }
    } progress:^(CGFloat progress) {
        [self showProgress:progress];
    }];

+(void)uploadAudio:(NSData )data
                          duration:(CGFloat)duration
                        completion:(uploadBlock)block
                          progress:(BmobProgressBlock)progressBlock

[MessageService uploadAudio:data
                           duration:duration
                         completion:^(BmobIMAudioMessage message, NSError error) {
                             if (!error) {
                                 [self.messagesArray addObject:message];
                                 [self scrollToBottom];
                                 __weak typeof(self)weakSelf = self;
                                 [self.conversation sendMessage:message completion:^(BOOL isSuccessful, NSError error) {
                                     [weakSelf reloadLastRow];
                                 }];
                             }
                         } progress:nil];

BmobIMLocationMessage message = [BmobIMLocationMessage messageWithAddress:@"广州大学城" attributes:@{KEY_METADATA:@{KEY_LATITUDE:@(23.039),KEY_LONGITUDE:@(113.388)}}];
    message.conversationType =  BmobIMConversationTypeSingle;
    message.createdTime = (uint64_t)([[NSDate date] timeIntervalSince1970]  1000);
    message.updatedTime = message.createdTime;
    [self.messagesArray addObject:message];
    [self scrollToBottom];
    __weak typeof(self)weakSelf = self;
    [self.conversation sendMessage:message completion:^(BOOL isSuccessful, NSError error) {
        [weakSelf reloadLastRow];
    }];

    BmobIMMessage message = [[BmobIMMessage alloc] init];
    message.msgType = @"notice";
    message.conversationType = BmobIMConversationTypeSingle;
    message.extra = @{KEY_IS_TRANSIENT:@(YES)};
    message.content = @"添加好友";
    [self.conversation sendMessage:message completion:^(BOOL isSuccessful, NSError error) {
        NSLog(@"error %@",error.localizedDescription);
    }];

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(receiveMessage:) name:kNewMessagesNotifacation object:nil];

-(void)receiveMessage:(NSNotification )noti{
    BmobIMMessage message = noti.object;
    //如果是消息来源是当前聊天用户，就将其加载到内存里并显示出来
    if ([message.fromId isEqualToString:self.conversation.conversationId]) {
        [self.messagesArray addObject:message];
        [self.tableView reloadData];
        [self.tableView scrollToRowAtIndexPath:[NSIndexPath indexPathForRow:self.messagesArray.count-1 inSection:0] atScrollPosition:UITableViewScrollPositionBottom animated:YES];
    }
}

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旧版](https://docs.bmob.cn/data/Android/a_faststart/doc/index.html)