qt--QVBoxLayout

 1     QWidget *window = new QWidget();
 2     //创建按键，暂无配置slot
 3     QPushButton *button1 = new QPushButton(tr("one"));
 4     QPushButton *button2 = new QPushButton(tr("two"));
 5     QPushButton *button3 = new QPushButton(tr("three"));
 6     QPushButton *button4 = new QPushButton(tr("four"));
 7     QPushButton *button5 = new QPushButton(tr("five"));
 8     //垂直布局
 9     QVBoxLayout *layout = new QVBoxLayout;
10     layout->addWidget(button1);
11     layout->addWidget(button2);
12     layout->addWidget(button3);
13     layout->addWidget(button4);
14     layout->addWidget(button5);
15 
16     window->setLayout(layout);
17     window->show();

//QVBoxLayout（垂直布局） \ QHBoxLayout(水平布局） 继承 QBoxLayout