The root cause is that your generated font file doesn't include the arrow symbol.
Typically an arrow symbol can be an image or text.
Best regards
Liubin
lv_dropdown_set_symbol(ui->zhu_ddlist_3, LV_SYMBOL_DOWN);
我加入这个之后还是不显示牙
hi,zjk
May I ask how I can better reproduce your problem? In order to better help you solve the problem, could you please send me your code with the problem?
BR
Xu Zhang