使用的输入法是搜狗，ubuntu16为中文。已经安装过fcitx
cp /usr/lib/x86_64-linux-gnu/qt5/plugins/platforminputcontexts/libfcitxplatforminputcontextplugin.so ./Qt5.9.8/5.9.8/gcc_64/plugins/platforminputcontexts/
cp /usr/lib/x86_64-linux-gnu/qt5/plugins/platforminputcontexts/libfcitxplatforminputcontextplugin.so ./Qt5.9.8/Tools/QtCreator/lib/Qt/plugins/platforminputcontexts/
重启Qt即可
来源：https://blog.csdn.net/m0_37581770/article/details/102574480