First install yaourt, or yay also, to yaourt example, the:
. 1, the sudo pacman -S yaourt
2, the sudo yaourt -S-sogoupinyin fcitx fcitx-configtool fcitx-IM
. 3, the sudo pacman -U https://arch-archive.tuna.tsinghua.edu.cn/2019/04-29/ Community / OS / the x86_64 / fcitx-qt4-4.2.9.6-1-x86_64.pkg.tar.xz
. 4, the sudo Nano / etc / Environment
. 5, the end of the file is written in the following three lines:
GTK_IM_MODULE = fcitx
QT_IM_MODULE = fcitx
XMODIFIERS = "IM = @ fcitx"
Ctrl + X, y-save, and then restart the system.