小编niw*_*eja的帖子

我在Qt中有一个简单的代码,如下所示:

#include "mainwindow.h"
#include <QWidget>
#include <QGroupBox>
#include <QLabel>
#include <QLineEdit>
#include <QGridLayout>
#include <QVBoxLayout>

class classA;
class classB;

MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent)
{
  classA * objA = new classA(this);
  classB * objB = new classB(this);

  QVBoxLayout * mainLayout = new QVBoxLayout(this);
  setLayout(mainLayout);
  mainLayout->addWidget(objA);
  mainLayout->addWidget(objB);
 }

MainWindow::~MainWindow(){}

classA::classA(QWidget *parent) : QWidget(parent)
{
    QGroupBox *grupa = new QGroupBox(tr("classA"),this);

    QLabel *labelA1 = new QLabel(tr("Label A1"));
    QLabel *labelA2 = new QLabel(tr("Label A2"));

    QLineEdit *LineEditA1 = new QLineEdit("LineEditA1");
    QLineEdit *LineEditA2 = new QLineEdit("LineEditA2");

    QGridLayout …