4.1 It is super simple to install QT without using Sogou Chinese input method

1. Simple method ：

#  Copy file libfcitxplatforminputcontextplugin.so  To the following installation directory ,Qt The directory needs to be modified by yourself ！Qt The directory needs to be modified by yourself ！Qt The directory needs to be modified by yourself ！
sudo cp /usr/lib/x86_64-linux-gnu/qt5/plugins/platforminputcontexts/libfcitxplatforminputcontextplugin.so /home/kile/Qt5.9.0/Tools/QtCreator/lib/Qt/plugins/platforminputcontexts/

sudo cp /usr/lib/x86_64-linux-gnu/qt5/plugins/platforminputcontexts/libfcitxplatforminputcontextplugin.so /home/kile/Qt5.9.0/5.9/gcc_64/plugins/platforminputcontexts/

2. The above method fails

If the above problems are configured well, they still cannot be solved , So you need to recompile libfcitxplatforminputcontextplugin.so

1、 install ：extra-cmake-modules
git clone https://github.com/KDE/extra-cmake-modules.git
After downloading, enter the corresponding directory ：
make
sudo make install

perhaps sudo apt install extra-cmake-modules

2、 install ：xkbcommon
https://lists.freedesktop.org/archives/wayland-devel/2019-February/040102.html
After downloading, enter the corresponding directory ：
./configure --disable-x11
make
sudo make install

3、 To github Upload and download ：fcitx-qt5 The source package
git clone https://github.com/fcitx/fcitx-qt5.git After decompression ,

export PATH=/home/jackie/Qt5.8.0/5.8/gcc_64/bin:$PATH

mkdir build
cd build
cmake -DENABLE_LIBRARY=false …
make

There are the following problems

CMake Error at CMakeLists.txt:46 (find_package):
By not providing “FindFcitx.cmake” in CMAKE_MODULE_PATH this project has
asked CMake to find a package configuration file provided by “Fcitx”, but
CMake did not find one.

Could not find a package configuration file provided by “Fcitx” (requested
version 4.2.8) with any of the following names:

FcitxConfig.cmake
fcitx-config.cmake

Add the installation prefix of “Fcitx” to CMAKE_PREFIX_PATH or set
“Fcitx_DIR” to a directory containing one of the above files. If “Fcitx”
provides a separate development package or SDK, be sure it has been
installed.

take cmake … It is amended as follows cmake -DENABLE_LIBRARY=false …

error: no matching function for call to ‘QMetaObject::invokeMethod(QFcitxPlatformInputContext*, QFcitxPlatformInputContext::setFocusObject(QObject*)::<lambda()>, Qt::ConnectionType)’

Replace /fcitx-qt5-master/qt5/platforminputcontext/qfcitxplatforminputcontext.cpp Under the same directory as qfcitxplatforminputcontext.h , again make that will do

File download link that needs to be replaced :https://url25.ctfile.com/f/34628125-616663558-6a6901?p=3005 ( Access password : 3005)

stay /build/qt5/platforminputcontext Lower bound libfcitxplatforminputcontextplugin.so Copied to the /home/kile/Qt5.9.0/5.9/gcc_64/plugins/platforminputcontexts/ /home/kile/Qt5.9.0/Tools/QtCreator/lib/Qt/plugins/platforminputcontexts/

/usr/lib/x86_64-linux-gnu/qt5/plugins/platforminputcontexts/