/**
   * images 图片数组
   * titles title数组
   * length_w 一行的数量
   * length_h 行数
   */
  static Widget getMenuGrade(
      List<String> images, List<String> titles, int length_w, int length_h) {
    int startIndex = 0;
    List<Widget> rowList = [];
    List<List<Widget>> columList = [];
    List<Widget> allList = [];
    for (int b = 0; b < length_h; b++) {
      for (int a = startIndex; a < startIndex + length_w; a++) {
        rowList.add(Expanded(
            child: Container(
              child: Column(
                children: [
                  Image.asset(
                    images[a],
                    height: 35,
                  ),
                  SizedBox(height: 5,),
                  Text(
                    titles[a],
                    style: TextStyle(fontSize: 12, color: PublicColors.textcolor2),
                  )
                ],
              ),
            )));
      }
      columList.add(rowList);
      rowList = [];
      startIndex = length_w * (b + 1);
    }

    for (int c = 0; c < columList.length; c++) {
      allList.add(Container(
          margin: EdgeInsets.fromLTRB(0, 15, 0, 0),
          child: Row(
            children: columList[c],
          )));
    }
    return Container(
      margin: EdgeInsets.fromLTRB(0, 40, 0, 0),
      child: Column(
        children: allList,
      ),
    );
  }

效果：