I just installed QtCreator in Windows, created a project and get many errors default code.

[Jed208]

Hi!
The version i installed is QtCreator 6.3.1
The errors are in the attached images



Why is this happening?

[JonB]

@Jed208 said in I just installed QtCreator in Windows, created a project and get many errors default code.:

The version i installed is QtCreator 6.3.1

The version of Qt Creator is not the issue. Your code cannot resolved #include <QMainWindow>. So have you installed Qt correctly?

[Christian Ehrlicher]

@JonB said in I just installed QtCreator in Windows, created a project and get many errors default code.:

So have you installed Qt correctly?

And do you add QT += widgets in your pro-file so you can use the QtWidgets library?

[Jed208]

@JonB I just installed it normally, and the installer didn't give me any errors

EDIT: i just remember, in the installation i choose the 6.4.2, but in the window that displays the option "About Qt Creator" it appears that i have 6.3.1, but the only kit available to use is Desktop Qt 6.2.4 MinGW 64-bit

I don't know if that is the cause of the error.

[Jed208]

@Christian-Ehrlicher Here are the pro-files

Im so noob in qtcreator, so i don't know is something is missing

[Christian Ehrlicher]

@Jed208 said in I just installed QtCreator in Windows, created a project and get many errors default code.:

so i don't know is something is missing

And do you add QT += widgets in your pro-file so you can use the QtWidgets library?

I already told you what to do.

[Jed208]

@Christian-Ehrlicher Oh sorry
I already added that but the error continues

[Christian Ehrlicher]

@Jed208 said in I just installed QtCreator in Windows, created a project and get many errors default code.:

I already added that but the error continues

I doubt it. And your screenshots (whyever we need screenshots for textfiles) does not show this.

[Jed208]

I added it as follows:
"untitled.pro"

TEMPLATE = subdirs
QT += widgets

SUBDIRS += \
    ui

"ui.pro"

QT       += core gui
QT += widgets

greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

CONFIG += c++17

# You can make your code fail to compile if it uses deprecated APIs.
# In order to do so, uncomment the following line.
#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0

SOURCES += \
    main.cpp \
    mainwindow.cpp

HEADERS += \
    mainwindow.h

FORMS += \
    mainwindow.ui

# Default rules for deployment.
qnx: target.path = /tmp/$${TARGET}/bin
else: unix:!android: target.path = /opt/$${TARGET}/bin
!isEmpty(target.path): INSTALLS += target

And in the header file it still appears 'QMainWindow' File not found

[Christian Ehrlicher]

You have to re-run qmake after thsi it's also useless to add it to your untitled.pro with the subdirs template.

[Jed208]

Thanks @Christian-Ehrlicher
I solved the problem by adding the project folder to the directory where I installed qt, it's not the most comfortable but it's what worked for me