dart - Flutter如何使用ListTile Threeline

Question

Flutter当我用ListTile ThreeLines的时候，不知道ThreeLine怎么用

    import 'package:flutter/material.dart';

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

class MyApp extends StatelessWidget {
  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: Scaffold(
        appBar: AppBar(
          title: Text('ddd'),
        ),
        body:Container(
        child: Column(
          children: <Widget>[
            ListTile(
              isThreeLine: true,
              leading: Icon(Icons.event_note),
              title: Text('Title 1'),
              // subtitle: Text('Title2'),
              subtitle: Column(

                children: <Widget>[
                  Text('Titile2'),
                  Text('Title 3'),
                  Text('Title 4'),
                  Text('and so on')
                ],
              ),

            )
          ],
        ),
      ) ,
      ),

    );
  }
}

当我删除 isThreeLines 时，代码正常

ListTile

谢谢

Answer 1

As from the docs:

The value of subtitle, which is optional, will occupy the space allocated for an additional line of text, or two lines if isThreeLine is true.

这基本上意味着 ListTile 的 subtitle 被赋予了更多空间以包含长度超过一行的文本: