詳見：
https://www.cnblogs.com/liuxuzzz/p/6409294.html
補(bǔ)充
我這邊裝的是32位的Ubuntu攻锰，只能安裝3.5.1的creator晾嘶，所以對(duì)應(yīng)插件路徑不一樣，而是：
../qtcreator-3.5.1/bin/plugins/platforminputcontexts/
完整命令如下：
~$ dpkg -L fcitx-frontend-qt5 | grep .so
/usr/lib/i386-linux-gnu/qt5/plugins/platforminputcontexts/libfcitxplatforminputcontextplugin.so
~$ cp /usr/lib/i386-linux-gnu/qt5/plugins/platforminputcontexts/libfcitxplatforminputcontextplugin.so ~/qtcreator-3.5.1/bin/plugins/platforminputcontexts/
~$ chmod +x ~/qtcreator-3.5.1/bin/plugins/platforminputcontexts/libfcitxplatforminputcontextplugin.so
