QT6 源（48）：往容器中添加子控件需要两步：先生成子控件并在构造函数里将子控件放入父容器，再把子控件添加入父容器的布局里。给出举例

（1）

++效果图：

（2）给出对应的搭建源代码，这是 QT 的编译器给出的正确的 C++ 代码：

#ifndef UI_WIDGET_H
#define UI_WIDGET_H

#include <QtCore/QVariant>
#include <QtWidgets/QApplication>
#include <QtWidgets/QCheckBox>
#include <QtWidgets/QFrame>
#include <QtWidgets/QGroupBox>
#include <QtWidgets/QHBoxLayout>
#include <QtWidgets/QPushButton>
#include <QtWidgets/QRadioButton>
#include <QtWidgets/QToolButton>
#include <QtWidgets/QVBoxLayout>
#include <QtWidgets/QWidget>

QT_BEGIN_NAMESPACE

class Ui_Widget
{
public:
    QVBoxLayout *verticalLayout;
    QGroupBox *groupBox;
    QHBoxLayout *horizontalLayout;
    QPushButton *pushButton;
    QToolButton *toolButton;
    QFrame *frame;
    QHBoxLayout *horizontalLayout_2;
    QCheckBox *checkBox;
    QRadioButton *radioButton;

    void setupUi(QWidget *Widget)
    {
        if (Widget->objectName().isEmpty())
            Widget->setObjectName(QString::fromUtf8("Widget"));
            
        Widget->resize(332, 284);
        
        QFont font;
        font.setPointSize(14);
        Widget->setFont(font);
        
        verticalLayout = new QVBoxLayout(Widget);
        verticalLayout->setObjectName(QString::fromUtf8("verticalLayout"));
        
        groupBox = new QGroupBox(Widget);
        groupBox->setObjectName(QString::fromUtf8("groupBox"));
        horizontalLayout = new QHBoxLayout(groupBox);
        horizontalLayout->setObjectName(QString::fromUtf8("horizontalLayout"));
        
        pushButton = new QPushButton(groupBox); //留意这三行代码是一组。这也是本文里提到的要学习的地方
        pushButton->setObjectName(QString::fromUtf8("pushButton"));
        horizontalLayout->addWidget(pushButton);

        toolButton = new QToolButton(groupBox);
        toolButton->setObjectName(QString::fromUtf8("toolButton"));
        horizontalLayout->addWidget(toolButton);

        verticalLayout->addWidget(groupBox);

        frame = new QFrame(Widget);
        frame->setObjectName(QString::fromUtf8("frame"));
        frame->setFrameShape(QFrame::StyledPanel);
        frame->setFrameShadow(QFrame::Raised);
        horizontalLayout_2 = new QHBoxLayout(frame);
        horizontalLayout_2->setObjectName(QString::fromUtf8("horizontalLayout_2"));
        
        checkBox = new QCheckBox(frame);
        checkBox->setObjectName(QString::fromUtf8("checkBox"));
        horizontalLayout_2->addWidget(checkBox);

        radioButton = new QRadioButton(frame);
        radioButton->setObjectName(QString::fromUtf8("radioButton"));
        horizontalLayout_2->addWidget(radioButton);

        verticalLayout->addWidget(frame);

        retranslateUi(Widget);

        QMetaObject::connectSlotsByName(Widget);
    } // setupUi

    void retranslateUi(QWidget *Widget)
    {
        Widget->setWindowTitle(QCoreApplication::translate("Widget", "Widget2-1", nullptr));
        groupBox->setTitle(QCoreApplication::translate("Widget", "GroupBox", nullptr));
        pushButton->setText(QCoreApplication::translate("Widget", "PushButton", nullptr));
        toolButton->setText(QCoreApplication::translate("Widget", "...", nullptr));
        checkBox->setText(QCoreApplication::translate("Widget", "CheckBox", nullptr));
        radioButton->setText(QCoreApplication::translate("Widget", "RadioButton", nullptr));
    } // retranslateUi

};

namespace Ui {
    class Widget: public Ui_Widget {};
} // namespace Ui

QT_END_NAMESPACE

#endif // UI_WIDGET_H

（3）

谢谢