tencent cloud

[[V2TIMManager sharedInstance] addGroupListener:self];

// 群成员相关通知、群生命周期相关通知、加群申请相关通知、话题事件监听回调等，不一一列举
- (void)onMemberEnter:(NSString *)groupID memberList:(NSArray<V2TIMGroupMemberInfo *>*)memberList {
    // 有新成员加入群，该群所有的成员都能收到
}

- (void)onMemberLeave:(NSString *)groupID member:(V2TIMGroupMemberInfo *)member {
    // 有成员离开群，该群所有的成员都能收到
}

- (void)onReceiveRESTCustomData:(NSString *)groupID data:(NSData *)data {
    // 服务器发送的自定义系统通知
}

class GroupListener final : public V2TIMGroupListener {
public:
    GroupListener() = default;
    ~GroupListener() override = default;

    // 群成员相关通知、群生命周期相关通知、加群申请相关通知、话题事件监听回调等，不一一列举

    void OnMemberEnter(const V2TIMString& groupID, const V2TIMGroupMemberInfoVector& memberList) override {
        // 有新成员加入群，该群所有的成员都能收到
    }

    void OnMemberLeave(const V2TIMString& groupID, const V2TIMGroupMemberInfo& member) override {
        // 有成员离开群，该群所有的成员都能收到
    }

    void OnReceiveRESTCustomData(const V2TIMString& groupID, const V2TIMBuffer& customData) override {
        // 服务器发送的自定义系统通知
    }
};

// 添加群事件监听器，注意在移除监听器之前需要保持 groupListener 的生命期，以免接收不到事件回调
GroupListener groupListener;
V2TIMManager::GetInstance()->AddGroupListener(&groupListener);

V2TIMGroupSearchParam *searchParam = [[V2TIMGroupSearchParam alloc] init];
searchParam.keywordList = @[@"keyword1", @"keyword2", @"keyword3"];
searchParam.isSearchGroupID = true;
searchParam.isSearchGroupName = true;
// 搜索群资料
[[V2TIMManager sharedInstance] searchGroups:searchParam succ:^(NSArray<V2TIMGroupInfo *> *groupList) {
  // 搜索群资料成功
} fail:^(int code, NSString *desc) {
  // 搜索群资料失败
}];

template <class T>
class ValueCallback final : public V2TIMValueCallback<T> {
public:
    using SuccessCallback = std::function<void(const T&)>;
    using ErrorCallback = std::function<void(int, const V2TIMString&)>;

    ValueCallback() = default;
    ~ValueCallback() override = default;

    void SetCallback(SuccessCallback success_callback, ErrorCallback error_callback) {
        success_callback_ = std::move(success_callback);
        error_callback_ = std::move(error_callback);
    }

    void OnSuccess(const T& value) override {
        if (success_callback_) {
            success_callback_(value);
        }
    }
    void OnError(int error_code, const V2TIMString& error_message) override {
        if (error_callback_) {
            error_callback_(error_code, error_message);
        }
    }

private:
    SuccessCallback success_callback_;
    ErrorCallback error_callback_;
};

V2TIMGroupSearchParam searchParam;
searchParam.keywordList = keywordList;
searchParam.isSearchGroupID = true;
searchParam.isSearchGroupName = true;

auto callback = new ValueCallback<V2TIMGroupInfoVector>{};
callback->SetCallback(
    [=](const V2TIMGroupInfoVector& groupInfoList) {
        // 搜索群组成功
        delete callback;
    },
    [=](int error_code, const V2TIMString& error_message) {
        // 搜索群组失败
        delete callback;
    });

V2TIMManager::GetInstance()->GetGroupManager()->SearchGroups(searchParam, callback);