对layui数据表格动态cols(字段)动态变化详解

function tableRender(cols_arr){
  table.render({
    elem: '#demo'
    , url: 请求地址 //数据接口
    , method: 'post'
    , page: true //开启分页
    , cols: cols_arr
    , id: 'demo'
    , limit: 10
    , limits: [10, 20, 50, 100, 200, 500]
    , done: function (res) {}
  });
}

// 搜索
form.on('submit(demo1)', function (obj) {
  var start_date = obj.field.start_date;
  var end_date = obj.field.end_date;
  if (start_date != '' && end_date != ''){
    var all_date = getAll(start_date, end_date);
    if ( all_date.length>7){
      layer.msg('查询天数不得超过7天', {icon: 2, anim: 6});
      return false;
    }
    window.cols_arr[0] = [];
    window.cols_arr[0][0] = {field:'group_id', title: '群号', align: 'center'};
    all_date.forEach(function(value,i){
      window.cols_arr[0][i+1]=({field: value, title: value, align: 'center'})
    })
  }
  tableRender(window.cols_arr);
  table.reload('demo', {
    page: {
      curr: 1
    },
    where: {
      all_date: all_date
    }
  });
  return false;
});