- (void)application:(UIApplication *)application didRegisterForRemoteNotificationsWithDeviceToken:(NSData *)deviceToken {
    [LCChatKitExample invokeThisMethodInDidRegisterForRemoteNotificationsWithDeviceToken:deviceToken];
}

/**
 * 初始化UNUserNotificationCenter
 */
- (void)registerForRemoteNotification {
    // iOS 10 兼容
    if (SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(@"10.0")) {
        
#if XCODE_VERSION_GREATER_THAN_OR_EQUAL_TO_8
        
        // 使用 UNUserNotificationCenter 来管理通知
        UNUserNotificationCenter *uncenter = [UNUserNotificationCenter currentNotificationCenter];
        // 监听回调事件
        [uncenter setDelegate:self];
        //iOS 10 使用以下方法注册，才能得到授权
        [uncenter requestAuthorizationWithOptions:(UNAuthorizationOptionAlert+UNAuthorizationOptionBadge+UNAuthorizationOptionSound)
                                completionHandler:^(BOOL granted, NSError * _Nullable error) {
                                    [[UIApplication sharedApplication] registerForRemoteNotifications];
                                    //TODO:授权状态改变
                                    NSLog(@"%@" , granted ? @"授权成功" : @"授权失败");
                                }];
        // 获取当前的通知授权状态, UNNotificationSettings
        [uncenter getNotificationSettingsWithCompletionHandler:^(UNNotificationSettings * _Nonnull settings) {
            NSLog(@"%s\nline:%@\n-----\n%@\n\n", __func__, @(__LINE__), settings);
            /*
             UNAuthorizationStatusNotDetermined : 没有做出选择
             UNAuthorizationStatusDenied : 用户未授权
             UNAuthorizationStatusAuthorized ：用户已授权
             */
            if (settings.authorizationStatus == UNAuthorizationStatusNotDetermined) {
                NSLog(@"未选择");
            } else if (settings.authorizationStatus == UNAuthorizationStatusDenied) {
                NSLog(@"未授权");
            } else if (settings.authorizationStatus == UNAuthorizationStatusAuthorized) {
                NSLog(@"已授权");
            }
        }];
        
#endif
        
    }
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wdeprecated-declarations"
    else if (SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(@"8.0")) {
        UIUserNotificationType types = UIUserNotificationTypeAlert |
                                       UIUserNotificationTypeBadge |
                                       UIUserNotificationTypeSound;
        UIUserNotificationSettings *settings = [UIUserNotificationSettings settingsForTypes:types categories:nil];
        
        [[UIApplication sharedApplication] registerUserNotificationSettings:settings];
        [[UIApplication sharedApplication] registerForRemoteNotifications];
    } else {
        UIRemoteNotificationType types = UIRemoteNotificationTypeBadge |
                                         UIRemoteNotificationTypeAlert |
                                         UIRemoteNotificationTypeSound;
        [[UIApplication sharedApplication] registerForRemoteNotificationTypes:types];
    }
#pragma clang diagnostic pop
}

#pragma mark UNUserNotificationCenterDelegate

#pragma mark - 添加处理 APNs 通知回调方法
///=============================================================================
/// @name 添加处理APNs通知回调方法
///=============================================================================

#pragma mark -
#pragma mark - UNUserNotificationCenterDelegate Method

#if XCODE_VERSION_GREATER_THAN_OR_EQUAL_TO_8

/**
 * Required for iOS 10+
 * 在前台收到推送内容, 执行的方法
 */
- (void)userNotificationCenter:(UNUserNotificationCenter *)center
       willPresentNotification:(UNNotification *)notification
         withCompletionHandler:(void (^)(UNNotificationPresentationOptions))completionHandler {
    NSDictionary *userInfo = notification.request.content.userInfo;
    if([notification.request.trigger isKindOfClass:[UNPushNotificationTrigger class]]) {
        //TODO:处理远程推送内容
        NSLog(@"%@", userInfo);
    }
    // 需要执行这个方法，选择是否提醒用户，有 Badge、Sound、Alert 三种类型可以选择设置
    completionHandler(UNNotificationPresentationOptionAlert);
}

/**
 * Required for iOS 10+
 * 在后台和启动之前收到推送内容, 点击推送后执行的方法
 */
- (void)userNotificationCenter:(UNUserNotificationCenter *)center
didReceiveNotificationResponse:(UNNotificationResponse *)response
         withCompletionHandler:(void (^)())completionHandler {
    NSDictionary *userInfo = response.notification.request.content.userInfo;
    if([response.notification.request.trigger isKindOfClass:[UNPushNotificationTrigger class]]) {
        //TODO:处理远程推送内容
        NSLog(@"%@", userInfo);
    }
    completionHandler();
}

#endif

#pragma mark -
#pragma mark - UIApplicationDelegate Method

/*!
 * Required for iOS 7+
 */
- (void)application:(UIApplication *)application
didReceiveRemoteNotification:(NSDictionary *)userInfo
fetchCompletionHandler:(void (^)(UIBackgroundFetchResult))completionHandler {
    //TODO:处理远程推送内容
    NSLog(@"%@", userInfo);
    // Must be called when finished
    completionHandler(UIBackgroundFetchResultNewData);
}

#pragma mark - 实现注册APNs失败接口（可选）
///=============================================================================
/// @name 实现注册APNs失败接口（可选）
///=============================================================================

/**
 * also used in iOS10
 */
- (void)application:(UIApplication *)application didFailToRegisterForRemoteNotificationsWithError:(NSError *)error {
    NSLog(@"%s\n[无法注册远程提醒, 错误信息]\nline:%@\n-----\n%@\n\n", __func__, @(__LINE__), error);
}