然后说一下这个，Flutter基础widgets教程-DataTable篇

1 DataTable

数据表显示原始数据集。它们通常出现在桌面企业产品中。DataTable Widget实现这个组件

2 构造函数

DataTable({
    Key key,
    @required this.columns,
    this.sortColumnIndex,
    this.sortAscending = true,
    this.onSelectAll,
    this.dataRowHeight = kMinInteractiveDimension,
    this.headingRowHeight = 56.0,
    this.horizontalMargin = 24.0,
    this.columnSpacing = 56.0,
    this.showCheckboxColumn = true,
    this.dividerThickness = 1.0,
    @required this.rows,
})

3 常用属性

3.1 columns：表头

columns:List<DataColumn>

3.1.1 columns：表头

columns:List<DataColumn>

3.2 columns：内容行

rows:List<DataRow>,

3.3 sortColumnIndex：排序列索引

sortColumnIndex:1,

3.4 sortAscending：升序排序

sortAscending:false,

3.4 onSelectAll：点击全选

onSelectAll: table.selectAll,