一、测试1

    static lv_coord_t col_dsc[] = { 80, 80, LV_GRID_FR(1), LV_GRID_TEMPLATE_LAST };
    static lv_coord_t row_dsc[] = { 45, LV_GRID_TEMPLATE_LAST };
    lv_obj_t* page = lv_img_create(lv_scr_act());
    lv_obj_center(page);
    lv_obj_set_size(page, 800, 600);
    isu_set_obj_default_style(page);
    lv_obj_t* cont = lv_obj_create(page);
    lv_obj_set_size(cont, 400, 300);
    lv_obj_align(cont, LV_ALIGN_LEFT_MID, 0, 0);
    lv_obj_set_layout(cont, LV_LAYOUT_GRID);
    lv_obj_set_style_grid_column_dsc_array(cont, col_dsc, 0);
    lv_obj_set_style_grid_row_dsc_array(cont, row_dsc, 0);

    for (int i = 0; i < 3; i++)
    {
        lv_obj_t* label_cont = lv_obj_create(cont);
        lv_obj_t*label = lv_label_create(label_cont);
        lv_label_set_text(label, "123");
        lv_obj_set_grid_cell(label_cont, LV_GRID_ALIGN_START, i, 1, LV_GRID_ALIGN_CENTER, 0, 1);
    }

二、测试2

    LV_LOG_WARN("layout_test");
    static lv_coord_t col_dsc[] = { 80, 80, LV_GRID_FR(1), LV_GRID_TEMPLATE_LAST };
    static lv_coord_t row_dsc[] = { 45, LV_GRID_TEMPLATE_LAST };
    lv_obj_t* page = lv_img_create(lv_scr_act());
    lv_obj_center(page);
    lv_obj_set_size(page, 800, 600);
    isu_set_obj_default_style(page);
    lv_obj_t* cont = lv_obj_create(page);
    lv_obj_set_size(cont, 400, 300);
    lv_obj_align(cont, LV_ALIGN_LEFT_MID, 0, 0);//设置cont左中对齐
    lv_obj_set_layout(cont, LV_LAYOUT_GRID);
    lv_obj_set_style_grid_column_dsc_array(cont, col_dsc, 0);
    lv_obj_set_style_grid_row_dsc_array(cont, row_dsc, 0);

    for (int i = 0; i < 3; i++)
    {
        lv_obj_t* label_cont = lv_obj_create(cont);
        lv_obj_set_size(label_cont, 80, 45);
        lv_obj_t* label = lv_label_create(label_cont);
        lv_obj_center(label);
        lv_label_set_text(label, "123");
        if (i == 2)
        {
            lv_obj_set_grid_cell(label_cont, LV_GRID_ALIGN_END, i, 1, LV_GRID_ALIGN_CENTER, 0, 1);
        }
        else {
            lv_obj_set_grid_cell(label_cont, LV_GRID_ALIGN_START, i, 1, LV_GRID_ALIGN_CENTER, 0, 1);
        }

    }

1，在不指定cont的style情况下，cont默认是存在padding的，所以label_cont在cont内部的左侧与上边存在空隙。若要消除这种空隙，则需要给cont的pad致0。 

三、测试3

    LV_LOG_WARN("layout_test");
    static lv_coord_t col_dsc[] = { 80, 80, LV_GRID_FR(1), LV_GRID_TEMPLATE_LAST };
    static lv_coord_t row_dsc[] = { 45, 45, LV_GRID_TEMPLATE_LAST };

    static lv_style_t style_control;
    if (!(style_control.sentinel == LV_STYLE_SENTINEL_VALUE && style_control.prop_cnt > 1))
    {
        lv_style_init(&style_control);
    }
    else
    {
        lv_style_reset(&style_control);
    }
    lv_style_set_radius(&style_control, 0);
    lv_style_set_pad_all(&style_control, 0);
    lv_style_set_border_width(&style_control, 0);
    lv_style_set_outline_width(&style_control, 0);
    lv_style_set_bg_color(&style_control, lv_color_make(256, 128, 64));
    lv_style_set_bg_opa(&style_control, 50);

    lv_obj_t* page = lv_img_create(lv_scr_act());
    lv_obj_center(page);
    lv_obj_set_size(page, 800, 600);
    isu_set_obj_default_style(page);
    lv_obj_t* cont = lv_obj_create(page);
    lv_obj_add_style(cont, &style_control, LV_PART_MAIN);
    lv_obj_set_size(cont, 400, 300);
    lv_obj_align(cont, LV_ALIGN_LEFT_MID, 0, 0);//设置cont左中对齐
    lv_obj_set_layout(cont, LV_LAYOUT_GRID);
    lv_obj_set_style_grid_column_dsc_array(cont, col_dsc, 0);
    lv_obj_set_style_grid_row_dsc_array(cont, row_dsc, 0);

    for (int j = 0; j < 2; j++)
    {
        for (int i = 0; i < 3; i++)
        {
            lv_obj_t* label_cont = lv_obj_create(cont);
            lv_obj_set_size(label_cont, 100, 45);
            lv_obj_add_style(label_cont, &style_control, LV_PART_MAIN);
            lv_obj_t* label = lv_label_create(label_cont);
            lv_obj_center(label);
            lv_label_set_text(label, "123");
            if (i == 2)
            {
                lv_obj_set_grid_cell(label_cont, LV_GRID_ALIGN_END, i, 1, LV_GRID_ALIGN_CENTER, j, 1);
            }
            else {
                lv_obj_set_grid_cell(label_cont, LV_GRID_ALIGN_START, i, 1, LV_GRID_ALIGN_CENTER, j, 1);
            }
        }
    }