Install Qt4 and use Qt4 in Ubuntu

Although the local machine is installed with Gnome Ubuntu, you can also develop Qt programs. If you download and compile Qt4 normally, it will take a long time. Therefore, use apt-get to install Qt4. Run: $ sudoapt-getinstalllibqt4-devlibqt4-debuglibqt4-guilibqt4-sqlqt4-dev-toolsqt4-docqt4-designerqt4-qtconfi

Although the local machine is installed with Gnome Ubuntu, you can also develop Qt programs. If you download and compile Qt4 normally, it will take a long time. Therefore, use apt-get to install Qt4.

Run:

$ Sudo apt-get install libqt4-dev libqt4-debug libqt4-gui libqt4-sql qt4-dev-tools qt4-doc qt4-designer

The system automatically installs and sets the environment. This will be faster. If you compile the source code directly, it will take a very long time to install it.

Compile an example program:

# Include
# Include

Int main (int argc, char * argv [])
{
QApplication app (argc, argv );

QPushButton hello ("Hello, man! ");
Hello. resize (100, 30 );

Hello. show ();
Return app.exe c ();
}

Then run:

$ Qmake-project
$ Qmake
$ Make
$./Project Name

As follows:

Isp @ hitisp :~ /Qtsrc $ vim QtHello. cpp
Isp @ hitisp :~ /Qtsrc $ qmake-project
Isp @ hitisp :~ /Qtsrc $ qmake
Isp @ hitisp :~ /Qtsrc $ make
G ++-c-pipe-g-Wall-W-D_REENTRANT-DQT_GUI_LIB-DQT_CORE_LIB-I/usr/share/qt4/mkspecs/linux-g ++-I. -I/usr/include/qt4/QtCore-I/usr/include/qt4/QtCore-I/usr/include/qt4/QtGui-I/usr/include/qt4/QtGui -I/usr/include/qt4-I. -I. -I. -o QtHello. o QtHello. cpp
G ++-o qtsrc QtHello. o-L/usr/lib-lQtGui-lQtCore-lpthread
Isp @ hitisp :~ /Qtsrc $ ls
Makefile QtHello. cpp QtHello. o qtsrc. pro
Isp @ hitisp :~ /Qtsrc $./qtsrc

The running result is a small window with only one button titled project name.