当我创建一个小部件时，移动对我来说不起作用，我给它前一个窗口（而不是父窗口）的位置，但它仍然不想接受我在 Ubuntu 上的 Qt 中需要的位置，即使

当我创建一个小部件时，移动对我来说不起作用，我给它前一个窗口（而不是父窗口）的位置，但它仍然不想接受我在 Ubuntu 上的 Qt 中需要的位置，尽管在 Windows 上一切正常

代码：

if(query.next()){ // проверка результата запроса
        QRect currentGeometry = this->geometry();
        QWidget *loggetInWindow = createAccountWindow(userType, currentGeometry);
        if(loggetInWindow){
            loggetInWindow->show();
            loggetInWindow->move(this->x(), this->y());
        }
    }
    else{
        QMessageBox::warning(this, "Ошибка входа", "Неверный логин или пароль.");
    }

我尝试交换 show 和 move（我不知道哪个才是正确的）但什么都没改变

补充代码，LoginWindow 是程序启动时立即打开的第一个初始窗口，loggetInWindow 这是单击按钮后打开的第二个窗口

    #include "ui_loginwindow.h"
    #include "registrationwindow.h"
    #include "loginwindow.h"
    #include "adminwindow.h"
    #include "clientwindow.h"
    #include "workerwindow.h"
    #include <QPropertyAnimation>
    #include <QtSql/QSqlDatabase> // для подключения к базе данных
    #include <QtSql/QSqlQuery> // для выполения запросов к базе данных
    #include <QMessageBox>

    LoginWindow::LoginWindow(QWidget *parent)
    : QWidget(parent)
    , ui(new Ui::LoginWindow)
{

    ui->setupUi(this);

    QComboBox *comboBox = ui->comboBox;

    comboBox->addItem("Клиент");
    comboBox->addItem("Администратор");
    comboBox->addItem("Работник");
}

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

void LoginWindow::on_pushButton_login_clicked() // кнопка вход
{
    QString userType = ui->comboBox->currentText();
    QString username = ui->lineEdit_username->text();
    QString password = ui->lineEdit_password->text();

    {
        QSqlDatabase db;
        if(QSqlDatabase::contains("loginConnection")){
            db = QSqlDatabase::database("loginConnection");
            if(!db.open()){
                qDebug() << "Failed open database LoginWindow\n";
                return;
            }
        }
        else{
            db = QSqlDatabase::addDatabase("QMYSQL", "loginConnection");
            db.setHostName("localhost");
            db.setUserName("zxctatar");
            db.setDatabaseName("zxctatar");
            if(!db.open()){
                qDebug() << "Failed open database LoginWindow\n";
                return;
            }
        }

        if(ui->lineEdit_username->text().length() == 0){
            QMessageBox::warning(this,"LoginWindow","Введите логин");
            return;
        }

        if(ui->lineEdit_password->text().length() == 0){
            QMessageBox::warning(this,"Пароль", "Введите пароль");
            return;
        }

        QSqlQuery query(db);
        if(userType == "Клиент"){
            query.prepare("SELECT * FROM Клиент WHERE Логин = :login AND Пароль = :password");
        }
        else if(userType == "Администратор"){
            query.prepare("SELECT * FROM Администратор WHERE StrComp(Логин, :login, 0) = 0 AND StrComp(Пароль, :password, 0) = 0");
        }
        else if(userType == "Работник"){
            query.prepare("SELECT * FROM Работник WHERE StrComp(Логин, :login, 0) = 0 AND StrComp(Пароль, :password, 0) = 0");
        }
        else{
            qDebug() << "Unknown user type\n";
            db.close();
            return;
        }
        query.bindValue(":login", username);
        query.bindValue(":password", password);

        if (!query.exec()){
            qDebug() << "Failed query\n";
            db.close();
            return;
        }

        if(query.next()){ // проверка результата запроса
            QRect currentGeometry = this->geometry();
            QWidget *loggetInWindow = createAccountWindow(userType, currentGeometry);
            if(loggetInWindow){
                loggetInWindow->show();
                loggetInWindow->move(this->x(), this->y());
            }
        }
        else{
            QMessageBox::warning(this, "Ошибка входа", "Неверный логин или пароль.");
        }

        db.close();
    }
    QSqlDatabase::removeDatabase("loginConnection");
}

QWidget* LoginWindow::createAccountWindow(const QString& userType, const QRect& geometry){ // проверка какое окно создать
    QWidget *loggedInWindow = nullptr;

    if(userType == "Клиент"){
        loggedInWindow = new ClientWindow(ui->lineEdit_username->text());
        loggedInWindow->setAttribute(Qt::WA_DeleteOnClose);
    }
    else if(userType == "Администратор"){
        loggedInWindow = new AdminWindow();
        loggedInWindow->setAttribute(Qt::WA_DeleteOnClose);
    }
    else if(userType == "Работник"){
        loggedInWindow = new WorkerWindow(ui->lineEdit_username->text());
        loggedInWindow->setAttribute(Qt::WA_DeleteOnClose);
    }

    if(loggedInWindow){
        loggedInWindow->setGeometry(geometry);
        loggedInWindow->setWindowOpacity(0.0);
        loggedInWindow->show();
    }

    return loggedInWindow;
}

void LoginWindow::on_pushButton_registration_clicked(){
    RegistrationWindow* regWindow = new RegistrationWindow(this);
    regWindow->setAttribute(Qt::WA_DeleteOnClose);

    regWindow->show();
    connect(regWindow, &RegistrationWindow::windowClosed, this, [=](){
        delete regWindow;
    });
}

最小可重复示例

    #include "mainwindow.h"

#include <QScreen>
#include <QApplication>

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    MainWindow w;

    QScreen *primaryScreen = QGuiApplication::primaryScreen();
    QRect availableGeometry = primaryScreen->availableGeometry();

    int x = (availableGeometry.width() - w.width()) / 2;
    int y = (availableGeometry.height() - w.height()) / 2;

    w.move(x,y);

    w.show();
    return a.exec();
}