Trouble using QML material design: “QtQuick.Controls.Material” is not installed

问题

I'm following this tutorial and I'm having a lot of QML module errors. I had to modify to QtQuick.Controls 1.1 because 2.0, 2.1, 2.3 wouldn't work. Here's my QML now:

import QtQuick.Window 2.1
import QtQuick 2.0
import QtQuick.Controls 1.1
import QtQuick.Controls.Material 2.1

Now I get only

"QtQuick.Controls.Material" is not installed

I'm using Ubuntu 17.10.1 and my PyQt reports version 5.7. Qt's website says:

Import Statement:   import QtQuick.Controls.Material 2.3
Since:  Qt 5.7

but it won't work. Since I have Qt 5.7 I should be able to use material design as the site says. But I can't even use QtQuick.Controls 2.x.

I don't wanna install Qt 5.8 because then my app won't be compatible with older linuxes. I need to use 5.7.

How should I make this work?

UPDATE:

After trying on my machine and losing track of what I had installed I created a docker container to test it:

FROM ubuntu:latest

ARG SIP_LINK=https://sourceforge.net/projects/pyqt/files/sip/sip-4.19.7/sip-4.19.7.tar.gz

ARG PYQT5_LINK=https://sourceforge.net/projects/pyqt/files/PyQt5/PyQt-5.10/PyQt5_gpl-5.10.tar.gz

RUN apt-get update \
    && apt-get install -y build-essential make wget ca-certificates \
    python3 python3-dev \
    qt5-default qml-module-qtquick-controls libqt5qml5 \
    --no-install-recommends \
    && rm -rf /var/lib/apt/lists/*

#SIP INSTALLAITON

RUN wget --progress=bar:force -O sip.tar.gz $SIP_LINK \
    && mkdir sip \
    && tar -xzvf sip.tar.gz -C sip --strip-components=1 \
    && rm sip.tar.gz \
    && cd sip \
    && python3 configure.py && make && make install \
    && cd .. \
    && rm -rf sip

#PYQT5 INSTALLAITON

RUN wget --progress=bar:force -O pyqt5.tar.gz $PYQT5_LINK \
    && mkdir pyqt5 \
    && tar -xzvf pyqt5.tar.gz -C pyqt5 --strip-components=1 \
    && rm pyqt5.tar.gz \
    && cd pyqt5 \
    && python3 configure.py --confirm-license && make && make install \
    && cd .. \
    && rm -rf pyqt5

WORKDIR /home/project

ENTRYPOINT "/bin/bash"

When I do

docker run --rm -it -v /tmp/.X11-unix:/tmp/.X11-unix -v /home/lz/project:/home/project -e DISPLAY=unix$DISPLAY test

and do ./main.py (I'm following main.py from here, I get:

root@3054a751f04b:/home/prject# ./main.py 
Traceback (most recent call last):
  File "./main.py", line 4, in <module>
    from PyQt5.QtQml import *
ImportError: No module named 'PyQt5.QtQml'

The packages qml-module-qtquick-controls libqt5qml5 were added just to try make it work but it didn't help

UPDATE 2: After adding the package python3-pyqt5.qtquick, I now get only the error:

QQmlApplicationEngine failed to load component
file:///home/project/main.qml:4 module "QtQuick.Controls.Material" is not installed

process 12: D-Bus library appears to be incorrectly set up; failed to read machine uuid: UUID file '/etc/machine-id' should contain a hex string of length 32, not length 0, with no other text
See the manual page for dbus-uuidgen to correct this issue.

However, I shouldn't have to add python3 qt packages because I'm building them

回答1:

The correct Ubuntu package for Qt Quick Controls 2 is qml-module-qtquick-controls2. This package includes the Material style.

回答2:

According to the Qt Documentation for QtQuick.Controls versions, you should probably import QtQuick 2.7 instead of 2.0 when using Qt 5.7:

import QtQuick 2.7
import QtQuick.Window 2.0
import QtQuick.Controls 2.0
import QtQuick.Controls.Material 2.0

来源：https://stackoverflow.com/questions/48944407/trouble-using-qml-material-design-qtquick-controls-material-is-not-installed

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qml