1.菜单栏上的弹出窗口

void MainWindow::on_new_action_triggered()
{
    MyDialog myDialog;//MyDialog是一个ui
    myDialog.setModal(true);
    myDialog.exec();
    /*******上面的写法弹出的窗口挡住后面的窗口***********/
    /*******下面的写法弹出的窗口不挡住后面的窗口，并且可以弹出多个****/
//    myDialog = new MyDialog(this);
//    myDialog->show();
}

2.水平布局&垂直布局

QWidget *window = new QWidget;
window->setWindowTitle("Layout测试");
QPushButton *button1 = new QPushButton("one");
QPushButton *button2 = new QPushButton("two");
QPushButton *button3 = new QPushButton("three");
QHBoxLayout * hlayout = new QHBoxLayout;
hlayout->addWidget(button1);
hlayout->addWidget(button2);
hlayout->addWidget(button3);
window->setLayout(hlayout);
window->show();

QVBoxLayout * hlayout = new QVBoxLayout;//垂直布局

本文出自 “阿凡达” 博客，请务必保留此出处http://shamrock.blog.51cto.com/2079212/1411247