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[[V2TIMManager sharedInstance] getGroupsInfo:@[@"groupA"] succ:^(NSArray<V2TIMGroupInfoResult *> *groupResultList) {
    // Obtained the group profile successfully
} fail:^(int code, NSString *desc) {
    // Failed to obtain the group profile
}];

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_;
};

V2TIMStringVector groupIDList;
groupIDList.PushBack("group1");

auto callback = new ValueCallback<V2TIMGroupInfoResultVector>{};
callback->SetCallback(
    [=](const V2TIMGroupInfoResultVector& groupInfoResultList) {
        // Obtained the group profile successfully
        delete callback;
    },
    [=](int error_code, const V2TIMString& error_message) {
        // Failed to obtain the group profile
        delete callback;
    });
V2TIMManager::GetInstance()->GetGroupManager()->GetGroupsInfo(groupIDList, callback);

V2TIMGroupInfo *info = [[V2TIMGroupInfo alloc] init];
info.groupID = @"Group ID of the group to be modified";
info.faceURL = @"http://xxxx";
[[V2TIMManager sharedInstance] setGroupInfo:info succ:^{
    // Modified the group profile successfully
} fail:^(int code, NSString *desc) {
    // Failed to modify the group profile
}];

class Callback final : public V2TIMCallback {
public:
    using SuccessCallback = std::function<void()>;
    using ErrorCallback = std::function<void(int, const V2TIMString&)>;

    Callback() = default;
    ~Callback() override = default;

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

    void OnSuccess() override {
        if (success_callback_) {
            success_callback_();
        }
    }
    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_;
};

V2TIMGroupInfo info;
info.groupID = "Group ID to be modified";
info.faceURL = "http://xxxx";
info.modifyFlag |= V2TIM_GROUP_INFO_MODIFY_FLAG_FACE_URL;

auto callback = new Callback;
callback->SetCallback(
    [=]() {
        // Modified the group profile successfully
        delete callback;
    },
    [=](int error_code, const V2TIMString& error_message) {
        // Failed to modify the group profile
        delete callback;
    });

V2TIMManager::GetInstance()->GetGroupManager()->SetGroupInfo(info, callback);