Installation and use of QT5 under Win7

1, installation Qt5　　

The installation of QT5 is much simpler than the installation of QT4, and I am loaded with Qt5.4(qt-opensource-windows-x86-mingw491_opengl-5.4.0.exe), which integrates MinGW, QT Creator, etc., does not require you to download MinGW and QT Creator separately.

First, go to QT official website download resources: Qt-opensource-windows-x86-mingw491_opengl-5.4.0.exe; Then, double-click Install. After installation, the Start menu:

2. Configure QT

Open the QT Creator, tools-and options, open the Options dialog box, as shown in:

If not detected, add the appropriate QT version and compiler (MinGW), and then set the build Kit (Kits): Device type, compiler (MinGW), debugger, QT version as shown in.

3. Using QT

Open QT Creator, new project---other projects-- empty Qmake project , project named "Qttest", add new file main.cpp.

Add the following code to the main.cpp:

#include <QApplication>#include<QVBoxLayout>#include<QLabel>#include<QPushButton>intMainintargcChar*argv[])    {qapplication app (ARGC,ARGV); Qwidget*window =NewQwidget; Window->setwindowtitle ("qttest"); //Qlabel *label= New Qlabel ("Hello Qt");Qlabel *label =NewQlabel ("""<font color = red>qt</font>"); Qpushbutton*button=NewQpushbutton ("Quit"); Qobject::connect (Button,signal (clicked ()),&App,slot (Quit ())); Qvboxlayout*layout=Newqvboxlayout; Layout-addwidget (label); Layout-addwidget (button); Window-setlayout (layout); Window-Show (); returnapp.exec ();}

At this point, the code displays the following error:

Run-time error prompt: #include <qapplication>--no such file ...

In fact,many of the common Qt header files in QT5 are moved to modules such as the core GUI widgets , and in QT5, the. Pro file needs to add an additional line (note case):

QT + + Core GUI widgets

where Qt + + Core GUI widgets represents link Qtcore (d). dll, Qtgui (d). dll, Qtwidgets (d). dll.

We add a line of the above code in the. Pro file, save, and then double-click to open the. cpp file, at which point the error line disappears and runs, as shown in the results:

Note:

1.QT supports a simple Html style format .

2,MinGW provides a set of simple and convenient based on the GCC program development environment under Windows . MinGW collects a series of free Windows-used header files and library files, and integrates the GNU toolset, especially GNU program development tools such as classic GCC, g++, make, etc. MinGW is free software, which simulates the development environment of the Linux under GCC on the Windows platform , provides a good foundation for C + + cross-platform development, and is familiar with C + + under Linux for programmers working under Windows. The engineering organization provided the conditions.

Installation and use of QT5 under Win7