qtquickcontrols2 | Qt Quick Controls 2 module delivers

Using the Qt Quick Application as a template. I'm following this documentation about styling https://doc.qt.io/qt-6/qtquickcontrols2-material.html. Here is the code:

I am trying to get Material design as explained in https://doc.qt.io/qt-5/qtquickcontrols2-styles.html, when i start app with -style material, i get an error :

I've been trying to build Qt 6.2.2 from source. I downloaded the sources package from the online installer but it fails each time, each time with a different error. I've tried a variety of configurations such as:

I'm currently working on learning QtQuick, and I've been running into a variety of issues, but this is the first one I've been unable to solve so far. For background, I'm using MVSC, Visual Studio 2019, CMake, and Qt6.

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Upon running my very basic program, I'm getting the error module "QtQuick.Controls" is not installed on my import statement for QtQuick Controls in the main.qml file I made. The relevant part of the CMakeLists.txt file I'm using is:

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I had read a article The Imagine Style that can be used in qml with c++ code style.

Which that need qtquickcontrols2.conf and Imagine Style or maybe others files.

But I don't know how to use it in pyqt style.

I want to know is it posssible to use The Imagine Style In pyqt ?

I have been building Qt 5 for a long time successfully on Windows using GCC/MinGW-w64. When I try the same with GCC 11.1, the build fails with a strange error message. What can I do to make it work?

I have built the compiler myself using the develop branch of https://github.com/niXman/mingw-builds with this command:

I want to set Material Dark Theme for my application in QtQuick2. I followed this official docs:

https://doc.qt.io/qt-5/qtquickcontrols2-styles.html

And applied one line in my main.cpp (changed nothing else from auto-generated code):

My Qt application is failing to start with the following error: module "QtQuick.Controls" version 2.12 is not installed

My platform is Ubuntu 20.04.2 LTS. This is a well-known error on StackOverflow. Unfortunately, no answers have worked for me this far. I have exhausted all suggested remedies without any improvement. These are enumerated below:

1. Checking compatibility of Qt with QuickControls: I am using Qt 5.12.8 in QtCreator, and QtCreator 4.11.0. I installed Qt using sudo apt install qt5 default and sudo apt-get install qtcreator. According to the documentation (see here, Qt 5.12 is directly compatible with QtQuick 2.12:
2. Checking if I specified QtQuick as a dependency: In my .pro file, I have added QT += quick qml quickcontrols2
3. Checking if I have the right libraries: I have qtquickcontrols2-5-dev, qt5declarative5-dev, and qml-module-qtquick-controls. Furthermore, apt-cache search qtquick shows me that all the qtquick modules are there
4. Re-installing qtcreator: Some questions suggest re-installing QtCreator. I have tried this, but it had no effect
5. QML Emulation layer: I have configured my project to "Use QML emulation layer that is built with the selected Qt". However, this also had no effect

Having performed every one of these steps, and exhausted all StackOverflow questions and Github threads related to the topic, I still cannot find what is causing this issue.

I have additionally included some related questions that I've tried. Question 4 is perhaps the closest to mine, but was solved via the Yocto build system that I am not using:

1. import QtQuick.Controls 2.1 QML MODULE NOT FOUND
2. Error module "QtQuick" version 2.12 is not installed
3. Ubuntu QT install qt quick controls 2.1
4. Qt - Module "QtQuick.Controls" is not installed

I would be extremely appreciative of any advice on further resolving this matter.

I have a sample project at: https://github.com/jh3010-qt-questions/dynamic_loading

I have read https://doc.qt.io/qt-5/qtqml-javascript-dynamicobjectcreation.html which explains how to load a component dynamically. I have implemented the method described in the documentation in my sample project and it works.

However, because the method is based on global variables, it is unclear how it can work when I am loading many component dynamically and asynchronously. If I wanted to loop over componentNames and load each component dynamically, how would I construct this asynchronous code?

main.qml