@tonystark Please do what is usually suggested here in such cases: set QT_DEBUG_PLUGINS env variable before starting your app and post its output here.

Lo resolví así

ln -svf /usr/lib/qt6/plugins /usr/plugins

@goddard said in Qt5.11 VS17 "Object reference not set to an instance of an object" issue:

I have this issue as well and nothing works. Just trying to import an existing project.

Go to Extensions > Qt VS Tools > Qt Options, and add a valid Qt Version.

See https://bugreports.qt.io/browse/QTVSADDINBUG-647

SOLUTION

with the help of @mrjj i found solution. It's just that instructions were not clear on tutorial

Steps

get the Qt creator source : git clone --recursive https://code.qt.io/qt-creator/qt-creator.git

set qmake version . your qmake version should be close to the qt version you are using . for e.g. if you are building for 5.10 your qmake should also use 5.10.

you can set qmake version by

sudo mv /usr/lib/x86_64-linux-gnu/qt-default/qtchooser/default.conf /usr/lib/x86_64-linux-gnu/qt-default/qtchooser/default.conf_orig sudo vim /usr/share/qtchooser/my_Qt_5.10.0_Desktop_gcc_x64.conf <Qt_dir>/5.10.0/gcc_64/bin <Qt_dir>/5.10.0/gcc_64/lib ln -s /usr/share/qtchooser/my_Qt_5.10.0_Destop_gcc_x64.conf /usr/lib/x86_64-linux-gnu/qt-default/qtchooser/default.conf

check qmake by qmake --version

mkdir qt-creator-build
cd qt-creator-build
qmake ../qt-creator/qtcreator.pro

4. ``` cd qt-creator-build make qmake_all make -j <number-of-cpu-cores+1>

wait for some time . it will take long time to build.

now you have both source and build of Qt creator . Now just follow the wizard and point the qt soruce and build locations

build and run

voila !! \0/

@Filipe-Antunes said in undefined reference in a shared class between plugin and app.:

-rdynamic is not supported by OSX and Windows (!= ELF format)

As is expected. The ABI on Windows is different enough and symbol resolution is done at link-time so it couldn't work. Follow @SGaist's advice and export the common classes from a library; that's the reason libraries were invented in the first place.

Kind regards.

it is answered in http://forum.qt.io/topic/64391/is-there-a-widget-dataflow-programming-inqt-commercial
thanks

That assumption is corrected.

AFAIK, having linking dependencies between two plugins is not a clean design.

@alexvplay I have used V-play plugins with QML application and all works good, but i want somehow to have oportunity user to disable receiving notification on his mobile when he install my application, i have try with Parse property:

enabled : bool

to be false, but user still received notifications...

So please can you give advice how i can make receiving of notification on mobile device where my app is installed to be configurable, i.e. user to have option to turn On or Off receiving notifications.

Thanks in advance

hello,

can you tell us how you solve your problem?
thank you.

And how i can retrieve it trough the API??

Hi and welcome to devnet,

Do you mean that you are using the plugin compiled with 5.2 with a 5.3.2 built project ?

@dheerendra said:

You need to get a instance to QObject and type cast to required interface.

From plugin? The QT automatically loads the plugin (qtdir/plugins/webkit/qwebkitplatformplugin.dll), do not know if it is used QPluginLoader, I noticed that if I add qdebug() << "test"; in dll it shows in the main console application, maybe I can use QApplication to share "data".