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欢迎去看原文：http://tryenough.com/flutter-dotline

效果

实现方案

方案一：

如果你用canvas画，可以参考这个库来绘制虚线：

https://pub.dartlang.org/packages/path_drawing#-installing-tab-

欢迎去看原文：http://tryenough.com/flutter-dotline

方案二：

定义分割线

class MySeparator extends StatelessWidget {
 final double height;
 final Color color;
 const MySeparator({this.height = 1, this.color = Colors.black});
 @override
 Widget build(BuildContext context) {
 return LayoutBuilder(
 builder: (BuildContext context, BoxConstraints constraints) {
 final boxWidth = constraints.constrainWidth();
 final dashWidth = 10.0;
 final dashHeight = height;
 final dashCount = (boxWidth / (2 * dashWidth)).floor();
 return Flex(
 children: List.generate(dashCount, (_) {
 return SizedBox(
 width: dashWidth,
 height: dashHeight,
 child: DecoratedBox(
 decoration: BoxDecoration(color: color),
 ),
 );
 }),
 mainAxisAlignment: MainAxisAlignment.spaceBetween,
 direction: Axis.horizontal,
 );
 },
 );
 }
}

使用 const MySeparator()

class App extends StatelessWidget {
 const App();
 @override
 Widget build(BuildContext context) {
 return MaterialApp(
 home: Material(
 child: Container(
 color: Colors.blue,
 child: Center(
 child: Container(
 height: 600, width: 350,
 decoration: BoxDecoration(
 color: Colors.white,
 borderRadius: BorderRadius.all(Radius.circular(16.0)),
 ),
 child: Flex(
 direction: Axis.vertical,
 children: [
 Expanded(child: Container()),
 const MySeparator(color: Colors.grey),
 Container(height: 200),
 ],
 ),
 ),
 ),
 ),
 ),
 );
 }
}

欢迎去看原文：http://tryenough.com/flutter-dotline