Qt QCompleter does not pop out

Question

Problem description

I want to be able to recognize the corresponding Chinese person name and complete the prompt by entering a short Chinese phonetic alphabet.

For example, I have a map (("lvbu", "吕布"), ("lvbuwei", "吕不韦")) , then enter "lv" or "bu". The completer should pop up "吕布" and "吕不韦", but it seems that the stringlist must contain the content currently being entered to complete the prompt. The completer cannot recognize the mapping relationship.

How can I solve this? I can hardly find a solution on the Internet because it involves Chinese.

My code

#include "mainwindow.h"
#include "ui_mainwindow.h"
#include "Pinyin2Hanzi/myPinyin.h"

MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent)
    , ui(new Ui::MainWindow)
{
    ui->setupUi(this);

    QString N = "吕布 吕不韦 南宫问天";
    QStringList Names = N.split(" ");
    // qDebug() << Names;

    ui->comboBox->addItem("");
    ui->comboBox->addItems(Names);
    ui->comboBox->lineEdit()->setClearButtonEnabled(true);
    CreateCompleter(Names, ui->comboBox->lineEdit());

    ui->comboBox->setMaxCount(ui->comboBox->count()); //这行代码可以防止按回车键自动往combobox里addItem

}

MainWindow::~MainWindow()
{
    delete ui;
}

std::map<std::string, std::vector<QString>> pinyin2NameMap; // This is a private variable

// 把所有人名按照拼音分类并存入map中
void MainWindow::PreparePinyinData(const QStringList &names)
{
    for (auto & name : names)
    {
        QString outFristPy,outFullPy;
        getComPingyinForStr(name, outFristPy, outFullPy);
        //        QString pinyin = GetPinyin(name);
        QString pinyin = outFullPy;
        // qDebug() <<"FristPy:" << outFristPy << "FullPy:" << outFullPy;
        // qDebug() <<"pinyin:" << pinyin;

        // QString fist, last;
        // myNameSplit(name, last, fist); // 自动切分 [姓、名]
        // last = getNamePingyin(last, true); // 获取 [姓] 的拼音
        // fist = getNamePingyin(fist, false);// 获取 [名] 的拼音
        // qDebug() << name + " : " + last + " " + fist << endl;
        pinyin2NameMap[pinyin.toStdString()].push_back(name);
    }
}

// 根据输入的拼音进行匹配并获取提示列表
QStringList MainWindow::GetMatchByPinyin(const QString &pinyin)
{
    QStringList result;
    if("" == pinyin.trimmed()){
        return QStringList();
    }
    for (const auto & iter : pinyin2NameMap){
        if (iter.first.find(pinyin.toStdString()) != std::string::npos){
            auto vec = iter.second;
            for(const auto & name : vec){
                result.append(name);
            }
        }
    }
    return result;
}

// 创建QCompleter并设置自动补全模型
void MainWindow::CreateCompleter(const QStringList &names, QLineEdit *lineEdit)
{
    PreparePinyinData(names);
    QStringListModel *model = new QStringListModel(names);
    QCompleter *completer = new QCompleter(model, lineEdit);
    completer->setCaseSensitivity(Qt::CaseInsensitive);
    completer->setFilterMode(Qt::MatchContains);
    completer->setCompletionMode(QCompleter::PopupCompletion);
    lineEdit->setCompleter(completer);
    connect(lineEdit, &QLineEdit::textEdited, [this,completer,lineEdit, model](const QString &text)
    {
        QStringList matchList = GetMatchByPinyin(text);
        qDebug() << "listmodel:" << matchList;
        // QString N = "lv不bu 可lvbuwei nan够gongwentian";
        // QStringList matchList = N.split(" ");
        model->setStringList(matchList);
        completer->setModel(model);
        completer->complete();
    });
}