如何在我的Qt应用程序中清理一系列字符的每个输入

#include <QtWidgets>

class MyWidget : public QWidget
{
    Q_OBJECT

public:
    MyWidget(QWidget *parent = nullptr) : QWidget(parent)
    {
        // 创建文本输入框
        QLineEdit *lineEdit = new QLineEdit(this);

        // 连接文本变化信号到槽函数
        connect(lineEdit, &QLineEdit::textChanged, this, &MyWidget::cleanInput);
    }

public slots:
    void cleanInput(const QString &text)
    {
        // 清理处理
        QString cleanedText = text;

        // 去除非法字符
        cleanedText.remove(QRegExp("[^a-zA-Z0-9]"));

        // 限制输入长度
        if (cleanedText.length() > 10)
            cleanedText = cleanedText.left(10);

        // 转换为大写
        cleanedText = cleanedText.toUpper();

        // 更新文本输入框内容
        QLineEdit *lineEdit = qobject_cast<QLineEdit*>(sender());
        lineEdit->setText(cleanedText);
    }
};

int main(int argc, char *argv[])
{
    QApplication app(argc, argv);

    MyWidget widget;
    widget.show();

    return app.exec();
}

#include "main.moc"