lvgl 参数和参数单位相对位置问题

使用相对对齐 lv_obj_align_to() 解决参数和参数单位相对位置问题，参数数据位数发生变化后，单位会自动跟随变化

lv_obj_t* unit_lab = NULL;
static void timer_cb(lv_timer_t* t)
{
    static uint32_t cnt = 0;
    lv_label_set_text_fmt(t->user_data, "%d", cnt+=(cnt/10+1));
    lv_obj_align_to(unit_lab, t->user_data, LV_ALIGN_OUT_RIGHT_BOTTOM, 0, 0);
}

void test(void)
{
    lv_obj_t* num_lab = lv_label_create(lv_scr_act());
    lv_obj_align(num_lab, LV_ALIGN_CENTER, 0, 0);
    lv_label_set_text_fmt(num_lab, "0");
    lv_obj_set_style_text_font(num_lab, &lv_font_montserrat_36, 0);
    lv_obj_set_style_text_color(num_lab, lv_color_hex(0xffff), 0);

    unit_lab = lv_label_create(lv_scr_act());
    lv_obj_align_to(unit_lab, num_lab, LV_ALIGN_OUT_RIGHT_BOTTOM, 0, 0);
    lv_label_set_text_fmt(unit_lab, "  h");
    lv_timer_t* timer = lv_timer_create(timer_cb, 100, num_lab);
    lv_timer_enable(timer);
}