如何存储QLineEdit字符串，并能够使用QPushButton将存储的字符串添加到QLineEdit？

QLineEdit *lineEdit = new QLineEdit(this);
QPushButton *button = new QPushButton("Add", this);

QString storedString;

connect(button, &QPushButton::clicked, this, [=]() {
    storedString = lineEdit->text();
});

#include <QLineEdit>
#include <QPushButton>

class MyWidget : public QWidget {
public:
    MyWidget(QWidget *parent = nullptr) : QWidget(parent) {
        QLineEdit *lineEdit = new QLineEdit(this);
        QPushButton *button = new QPushButton("Add", this);

        connect(button, &QPushButton::clicked, this, [=]() {
            storedString = lineEdit->text();
            // 在这里可以执行其他操作
        });
    }

private:
    QString storedString;
};