Privacy - Photo Library Usage Description 需要访问您的相册
   Privacy - Microphone Usage Description 需要访问您的麦克风
   Privacy - Camera Usage Description 需要访问您的摄像机

  #ifdef __OBJC__
   #import <HelpDesk/HelpDesk.h>
  #import "HelpDeskUI.h"
  #endif

    //注册APNs推送
    [application registerForRemoteNotifications];
    UIUserNotificationType notificationTypes = UIUserNotificationTypeBadge | UIUserNotificationTypeSound |   UIUserNotificationTypeAlert;
    UIUserNotificationSettings *settings = [UIUserNotificationSettings settingsForTypes:notificationTypes categories:nil];
    [application registerUserNotificationSettings:settings];
    //您注册了推送功能，iOS 会自动回调以下方法，得到 deviceToken，您需要将 deviceToken 传给 SDK。
    // 将得到的deviceToken传给SDK
    - (void)application:(UIApplication *)application didRegisterForRemoteNotificationsWithDeviceToken:(NSData *)deviceToken{
        [[HChatClient sharedClient] bindDeviceToken:deviceToken];
    }

    // 注册deviceToken失败
    - (void)application:(UIApplication *)application didFailToRegisterForRemoteNotificationsWithError:(NSError *)error{
        NSLog(@"error -- %@",error);
        //APNS 注册失败，一般是由于使用了通用证书或者是模拟器调试导致，请检查证书并用真机调试。此处是 iOS 系统报的错，如仍不能确定，请从网上查找相关资料。
    }

 HOptions *option = [[HOptions alloc] init];
 option.appkey = @"Your appkey"; //(必填项)
 option.tenantId = @"Your tenantId";//(必填项)
 //推送证书名字
 option.apnsCertName = @"your apnsCerName";//(集成离线推送必填)
 //Kefu SDK 初始化,初始化失败后将不能使用Kefu SDK
 HError *initError = [[HChatClient sharedClient] initializeSDKWithOptions:option];
 if (initError) { // 初始化错误
 }

HError *error = [[HChatClient sharedClient] registerWithUsername:@"username" password:@"password"];
error.code:
HErrorNetworkUnavailable 网络不可用
HErrorUserAlreadyExist 用户已存在
HErrorUserAuthenticationFailed 无开放注册权限（后台管理界面设置[开放|授权]）
HErrorUserIllegalArgument 用户名非法

HChatClient *client = [HChatClient sharedClient];
    if (client.isLoggedInBefore != YES) {
        HError *error = [client loginWithUsername:@"username" password:@"password"];
        if (!error) { //登录成功
            HDMessageViewController *chatVC = [[HDMessageViewController alloc] initWithConversationChatter:@"IM 服务号"];
            [self.navigationController pushViewController:chatVC animated:YES];
        } else { //登录失败
            return;
        }
    } else { //已经成功登录
         HDMessageViewController *chatVC = [[HDMessageViewController alloc] initWithConversationChatter:@"IM 服务号"];
         [self.navigationController pushViewController:chatVC animated:YES];
    }
}

HDMessageViewController *chatVC = [[HDMessageViewController alloc] initWithConversationChatter:@"IM 服务号"];
[self.navigationController pushViewController:chatVC animated:YES];

HChatClient *client = [HChatClient sharedClient];
if(client.isLoggedInBefore){
    //已经登录，可以直接进入会话界面
}else{
    //未登录，需要登录后，再进入会话界面
}

//参数为是否解绑推送的devicetoken
HError *error = [[HChatClient sharedClient] logout:YES];
if (error) { //登出出错
} else {//登出成功
}

//添加网络监控，一般在app初始化的时候添加监控，第二个参数是执行代理方法的队列，默认是主队列
[[HChatClient sharedClient] addDelegate:self delegateQueue:nil];
//移除网络监控
[[HChatClient sharedClient] removeDelegate:self];
/* 有以下几种情况, 会引起该方法的调用:
* 1. 登录成功后, 手机无法上网时, 会调用该回调
* 2. 登录成功后, 网络状态变化时, 会调用该回调*/
- (void)connectionStateDidChange:(HConnectionState)aConnectionState {
    switch (aConnectionState) {
        case HConnectionConnected: {//已连接
            break;
        }
        case HConnectionDisconnected: {//未连接
            break;
        }
        default:
            break;
    }
}
// 当前登录账号已经被从服务器端删除时会收到该回调
- (void)userAccountDidRemoveFromServer {
    
}
//当前登录账号在其它设备登录时会接收到此回调
- (void)userAccountDidLoginFromOtherDevice {
    
}

//添加消息监控，第二个参数是执行代理方法的队列，默认是主队列
[[HChatClient sharedClient].chat addDelegate:self delegateQueue:nil];
//移除消息监控
[[HChatClient sharedClient].chat removeDelegate:self];

- (void)messagesDidReceive:(NSArray *)aMessages{
     //收到普通消息,格式:<HMessage *>
}

- (void)cmdMessagesDidReceive:(NSArray *)aCmdMessages{
     //收到命令消息,格式:<HMessage *>，命令消息不存数据库，一般用来作为系统通知，例如留言评论更新，
     //会话被客服接入，被转接，被关闭提醒
}

- (void)messageStatusDidChange:(HMessage *)aMessage error:(HError *)aError{
     //消息的状态修改，一般可以用来刷新列表，显示最新的状态
}

- (void)messageAttachmentStatusDidChange:(HMessage *)aMessage error:(HError *)aError{
    //发送消息后，会调用，可以在此刷新列表，显示最新的消息
}