How do I cancel the focus border of a component?

I am using keyboard input, but when I focus on a component that needs to be operated, the component will have a focus frame. I try to use lv_ obj_ add_ Style (roller1,&style, LV_STATE_FOCUSED), has no effect.

You need remove style
Group indev create blue and red border around object in group - How-to - LVGL Forum

Thank you very much for sharing, which solved my problem.