Qt官方示例-动态布局

mainLayout = new QGridLayout;
mainLayout->addWidget(rotatableGroupBox, 0, 0);
...
setLayout(mainLayout);

rotatableGroupBox = new QGroupBox(tr("Rotatable Widgets"));

rotatableWidgets.enqueue(new QSpinBox);
rotatableWidgets.enqueue(new QSlider);
rotatableWidgets.enqueue(new QDial);
rotatableWidgets.enqueue(new QProgressBar);
...
/* 绑定QGridLayout布局 */
rotatableLayout = new QGridLayout;
rotatableGroupBox->setLayout(rotatableLayout);

rotateWidgets();

void Dialog::rotateWidgets()
{
    Q_ASSERT(rotatableWidgets.count() % 2 == 0);

    foreach (QWidget *widget, rotatableWidgets)
        rotatableLayout->removeWidget(widget); /* 移除旧布局 */

    rotatableWidgets.enqueue(rotatableWidgets.dequeue());

    const int n = rotatableWidgets.count();
    for (int i = 0; i < n / 2; ++i) {
        /* 重新布局 */
        rotatableLayout->addWidget(rotatableWidgets[n - i - 1], 0, i);
        rotatableLayout->addWidget(rotatableWidgets[i], 1, i);
    }
}

C:\Qt\{你的Qt版本}\Examples\{你的Qt版本}\widgets\layouts\dynamiclayouts

https://doc.qt.io/qt-5/qtwidgets-layouts-dynamiclayouts-example.html