Qt 保存窗体状态

用QSetting来保存窗体状态，下次打开时还是关闭时的状态，spy003是我的主函数，setdialog是设置函数，在主函数中打开设置界面，然后在设置界面中设置相关参数，等下次打开时参数还是这次设置的参数，各位看看有什么错误
void SetDialog::writesetting()
{
     QSettings settings("My Pro","spy003");
     settings.setValue("text",ui->flowinputlineEdit->text());
}
void SetDialog::readsetting()
{
    QSettings setting("My Pro","spy003");
    QString text=setting.value("text").toString();
    ui->flowinputlineEdit->setText(text);
}
void SetDialog::closeEvent(QCloseEvent *e)
{
    writesetting();
}