看来它来自border
of Container
,
Github 问题 https://github.com/flutter/flutter/issues/14288#issuecomment-668795963仍然开放。
这是小部件
Scaffold(
backgroundColor: Colors.green,
body: Column(
children: <Widget>[
Expanded(
flex: 4,
child: Container(
alignment: Alignment.center,
decoration: BoxDecoration(
color: Colors.green,
border: Border.all(
color: Colors.green,
),
),
child: Text("Section A"),
),
),
Expanded(
flex: 6,
child: Container(
alignment: Alignment.center,
decoration: BoxDecoration(
color: Colors.green,
border: Border.all(
color: Colors.green,
),
),
child: Text("Section B"),
),
),
],
),
);