安装fcitx-frontend-qt5

azheng@ubuntu16:~$ sudo apt-get install fcitx-frontend-qt5

拷贝plugin文件到Qt对应的目录中

azheng@ubuntu16:~$ cp /usr/lib/x86_64-linux-gnu/qt5/plugins/platforminputcontexts/libfcitxplatforminputcontextplugin.so  /home/azheng/Qt5.7.0/5.7/gcc_64/plugins/platforminputcontexts/ azheng@ubuntu16:~$ cp /usr/lib/x86_64-linux-gnu/qt5/plugins/platforminputcontexts/libfcitxplatforminputcontextplugin.so  /home/azheng/Qt5.7.0/Tools/QtCreator/lib/Qt/plugins/platforminputcontexts/ azheng@ubuntu16:~$ 

重启Qt5， 测试OK。