1、代码

    QLabel* nameLabel = new QLabel("名字：(&N)");
    QLabel* ageLabel = new QLabel("年龄：(&G)");
    QLabel* emailLabel = new QLabel("邮箱：(&M)");
    QLabel* menlLabel = new QLabel("门牌号：");

    QLineEdit* nameLineEdit = new QLineEdit;
    QLineEdit* ageLineEdit = new QLineEdit;
    QLineEdit* emailLineEdit = new QLineEdit;
    QLineEdit* menlLineEdit = new QLineEdit;

    // 设置伙伴关系
    // 按住Alt + N 快捷键可以聚焦
    nameLabel->setBuddy(nameLineEdit);
    ageLabel->setBuddy(ageLineEdit);
    emailLabel->setBuddy(emailLineEdit);

    // 常用表单布局
    QFormLayout* qformLayout = new QFormLayout;
    // 添加一行
    qformLayout->addRow(nameLabel,nameLineEdit);
    qformLayout->addRow(ageLabel,ageLineEdit);
    qformLayout->addRow(emailLabel,emailLineEdit);
    qformLayout->addRow(menlLabel,menlLineEdit);

    QLabel* sexlLabel = new QLabel("性别：");
    QRadioButton* menbtn = new QRadioButton;
    QRadioButton* wmenbtn = new QRadioButton;
    menbtn->setText("男");
    wmenbtn->setText("女");

    // 水平布局
    QHBoxLayout* sexLayout = new QHBoxLayout;
    sexLayout->addWidget(sexlLabel);
    sexLayout->addWidget(menbtn);
    sexLayout->addWidget(wmenbtn);

    // 垂直布局
    QVBoxLayout* mainLayout = new QVBoxLayout(&myg);
    // 添加空间
    QSpacerItem* spaceitem = new QSpacerItem(30,30);

    QHBoxLayout* btnshui = new QHBoxLayout;
    QSpacerItem* btnspace = new QSpacerItem(300,30);
    btnshui->addItem(btnspace);
    btnshui->addWidget(sumbtn);
    
    // 添加布局
    mainLayout->addLayout(qformLayout);
    mainLayout->addLayout(sexLayout);
    mainLayout->addLayout(btnshui);

    mainLayout->setMargin(10);  // 与窗体之间间隙
    mainLayout->setSpacing(20); // 空间间的间隙
    myg.setLayout(mainLayout);