In this tutorial we will learn how to Add tab to QTabWidget.

Step 1 – File->Other Project->Empty Qt Project

When we create a Empty Qt Project There is nothing in the Project explorer, and even the .pro file has nothing in it. So, we need to create a main.cpp file.

Step 2 – Right Click on Project -> Add New -> C++ -> C++ Source file -> Choose

And Give the name main.cpp file and press finish.

main.cpp

#include <QApplication>
#include <QMainWindow>
#include <QTabWidget>

int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
    QMainWindow *window = new QMainWindow();

        window->setWindowTitle(QString::fromUtf8("MainWindow"));
        window->resize(250, 250);

        QWidget *centralWidget = new QWidget(window);
    QTabWidget *tabs = new QTabWidget(centralWidget);

    tabs->setFixedSize(245, 245);
    tabs->addTab(new QWidget(),"TAB 1");
    tabs->addTab(new QWidget(),"TAB 2");

    window->setCentralWidget(centralWidget);
    window->show();

    return app.exec();

}

.pro file

QT += core gui

greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

SOURCES += \
    main.cpp