创建style

• 初时化base style

    static lv_style_t style_base;
    lv_style_init(&style_base);

• 设置背景色为淡蓝色

 lv_style_set_bg_color(&style_base, lv_palette_main(LV_PALETTE_LIGHT_BLUE));

• 设置边框背景色为LV_PALETTE_LIGHT_BLUE

lv_style_set_border_color(&style_base, lv_palette_darken(LV_PALETTE_LIGHT_BLUE,3));

• 设置边框线宽为2

lv_style_set_border_width(&style_base, 2);

• 设置倒角为10

  lv_style_set_radius(&style_base, 10);

• 设置阴影宽度为10

  lv_style_set_shadow_width(&style_base, 10);

• 设置阴影在bottom下方出现

 lv_style_set_shadow_ofs_y(&style_base, 5);

• 设置阴影透明度为50%

  lv_style_set_shadow_opa(&style_base, LV_OPA_50);

• 设置文本颜色为白色

 lv_style_set_text_color(&style_base, lv_color_white());

• 设置style宽度为100

  lv_style_set_width(&style_base, 100);

• 设置style高度为LV_SIZE_CONTENT

lv_style_set_height(&style_base, LV_SIZE_CONTENT);

• 初时化另一个warning style

    static lv_style_t style_warning;
    lv_style_init(&style_warning);

• 设置背景色，边框背景色和文本颜色为黄色

 lv_style_set_bg_color(&style_warning, lv_palette_main(LV_PALETTE_YELLOW));
 lv_style_set_border_color(&style_warning, lv_palette_darken(LV_PALETTE_YELLOW,3));
 lv_style_set_text_color(&style_warning, lv_palette_darken(LV_PALETTE_YELLOW, 4));

• 创建obj对象，添加style,居中显示

    lv_obj_t* obj_base = lv_obj_create(lv_scr_act());
    lv_obj_add_style(obj_base, &style_base, 0);
    lv_obj_align(obj_base, LV_ALIGN_LEFT_MID, 20, 0);
    lv_obj_t* label = lv_label_create(obj_base);
    lv_label_set_text(label, "Base");
    lv_obj_center(label);
    
    lv_obj_t* obj_warning = lv_obj_create(lv_scr_act());
    lv_obj_add_style(obj_warning, &style_base, 0);
    lv_obj_add_style(obj_warning, &style_warning, 0);
    lv_obj_align(obj_warning, LV_ALIGN_RIGHT_MID, -20, 0);
    label = lv_label_create(obj_warning);
    lv_label_set_text(label, "Warning");
    lv_obj_center(label);

完整代码，仅供参考

static void lv_example_style_11(void)
{
    /*A base style*/
    static lv_style_t style_base;
    lv_style_init(&style_base);
    lv_style_set_bg_color(&style_base, lv_palette_main(LV_PALETTE_LIGHT_BLUE));
    lv_style_set_border_color(&style_base, lv_palette_darken(LV_PALETTE_LIGHT_BLUE,3));
    lv_style_set_border_width(&style_base, 2);
    lv_style_set_radius(&style_base, 10);
    lv_style_set_shadow_width(&style_base, 10);
    lv_style_set_shadow_ofs_y(&style_base, 5);
    lv_style_set_shadow_opa(&style_base, LV_OPA_50);
    lv_style_set_text_color(&style_base, lv_color_white());
    lv_style_set_width(&style_base, 100);
    lv_style_set_height(&style_base, LV_SIZE_CONTENT);
    /*Set only the properties that should be different*/
    static lv_style_t style_warning;
    lv_style_init(&style_warning);
    lv_style_set_bg_color(&style_warning, lv_palette_main(LV_PALETTE_YELLOW));
    lv_style_set_border_color(&style_warning, lv_palette_darken(LV_PALETTE_YELLOW,3));
    lv_style_set_text_color(&style_warning, lv_palette_darken(LV_PALETTE_YELLOW, 4));
    /*Create an object with the base style only*/
    lv_obj_t* obj_base = lv_obj_create(lv_scr_act());
    lv_obj_add_style(obj_base, &style_base, 0);
    lv_obj_align(obj_base, LV_ALIGN_LEFT_MID, 20, 0);
    lv_obj_t* label = lv_label_create(obj_base);
    lv_label_set_text(label, "Base");
    lv_obj_center(label);
    /*Create an other object with the base style and earnings style too*/
    lv_obj_t* obj_warning = lv_obj_create(lv_scr_act());
    lv_obj_add_style(obj_warning, &style_base, 0);
    lv_obj_add_style(obj_warning, &style_warning, 0);
    lv_obj_align(obj_warning, LV_ALIGN_RIGHT_MID, -20, 0);
    label = lv_label_create(obj_warning);
    lv_label_set_text(label, "Warning");
    lv_obj_center(label);
}

调用lv_example_style_11运行效果