flutter - 如何在颤动的 DataTable DataCell 中添加列小部件？

Question

DataTable DataCell 中小部件的高度可以变化：

 DataCell(Text('Professor\nProfessor\nProfessor\nProfessor\nProfessor\nProfessor\n'))

但是，如果将数据添加为列，则单元格会溢出。为什么？以及如何解决？

 DataRow(
          cells: <DataCell>[
            DataCell(Text('Janine')),
            DataCell(Text('43')),
            DataCell(Column(mainAxisSize: MainAxisSize.min, children: [
              Text("Professor"),
              Text("Professor"),
              Text("Professor"),
              Text("Professor"),
            ])),
            // DataCell(Text('Professor\nProfessor\nProfessor\nProfessor\nProfessor\nProfessor\n')),
          ],
        ),

import 'package:flutter/material.dart';

void main() => runApp(MyApp());

/// This is the main application widget.
class MyApp extends StatelessWidget {
  static const String _title = 'Flutter Code Sample';

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: _title,
      home: Scaffold(
        appBar: AppBar(title: const Text(_title)),
        body: MyStatelessWidget(),
      ),
    );
  }
}

/// This is the stateless widget that the main application instantiates.
class MyStatelessWidget extends StatelessWidget {
  MyStatelessWidget({Key key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return DataTable(
      columns: const <DataColumn>[
        DataColumn(
          label: Text(
            'Name',
            style: TextStyle(fontStyle: FontStyle.italic),
          ),
        ),
        DataColumn(
          label: Text(
            'Age',
            style: TextStyle(fontStyle: FontStyle.italic),
          ),
        ),
        DataColumn(
          label: Text(
            'Role',
            style: TextStyle(fontStyle: FontStyle.italic),
          ),
        ),
      ],
      rows: <DataRow>[
        DataRow(
          cells: <DataCell>[
            DataCell(Text('Sarah')),
            DataCell(Text('19')),
            DataCell(Text('Student')),
          ],
        ),
        DataRow(
          cells: <DataCell>[
            DataCell(Text('Janine')),
            DataCell(Text('43')),
            DataCell(Column(mainAxisSize: MainAxisSize.min, children: [
              Text("Professor"),
              Text("Professor"),
              Text("Professor"),
              Text("Professor"),
            ])),
            // DataCell(Text('Professor\nProfessor\nProfessor\nProfessor\nProfessor\nProfessor\n')),
          ],
        ),
        DataRow(
          cells: <DataCell>[
            DataCell(Text('William')),
            DataCell(Text('27')),
            DataCell(Text('Associate Professor')),
          ],
        ),
      ],
    );
  }
}

标签： flutter

Answer 1

您需要使用 SingleChildScrollView 包装您的列。这是我的解决方案。

DataCell(Expanded(
            child: SingleChildScrollView(
              child: Column(mainAxisSize: MainAxisSize.min, children: [
                Text("Professor"),
                Text("Professor"),
                Text("Professor"),
                Text("Professor"),
              ]),
            ),
          ))