flutter - 在颤动中创建进度条指示器形状
解决方案
您可以在下面复制粘贴运行完整代码
您可以使用包https://pub.dev/packages/clippy_flutter和https://pub.dev/packages/step_progress_indicator
当 step index
== 0 返回时Point
,否则返回Chevron
代码片段
StepProgressIndicator(
totalSteps: 3,
currentStep: 2,
size: 20,
selectedColor: Colors.orangeAccent,
unselectedColor: Colors.grey,
customStep: (index, color, _) => index == 0
? Point(
triangleHeight: 20.0,
edge: Edge.RIGHT,
child: Container(
color: color,
child: Center(child: Text('')),
))
: Chevron(
triangleHeight: 20.0,
edge: Edge.RIGHT,
child: Container(
color: color,
child: Center(child: Text('')),
)),
),
工作演示
import 'package:flutter/material.dart';
import 'package:clippy_flutter/clippy_flutter.dart';
import 'package:step_progress_indicator/step_progress_indicator.dart';
void main() {
runApp(MyApp());
}
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
visualDensity: VisualDensity.adaptivePlatformDensity,
),
home: MyHomePage(title: 'Flutter Demo Home Page'),
);
}
}
class MyHomePage extends StatefulWidget {
MyHomePage({Key key, this.title}) : super(key: key);
final String title;
@override
_MyHomePageState createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
int _counter = 0;
void _incrementCounter() {
setState(() {
_counter++;
});
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(widget.title),
),
body: Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
StepProgressIndicator(
totalSteps: 3,
currentStep: 2,
size: 20,
selectedColor: Colors.orangeAccent,
unselectedColor: Colors.grey,
customStep: (index, color, _) => index == 0
? Point(
triangleHeight: 20.0,
edge: Edge.RIGHT,
child: Container(
color: color,
child: Center(child: Text('')),
))
: Chevron(
triangleHeight: 20.0,
edge: Edge.RIGHT,
child: Container(
color: color,
child: Center(child: Text('')),
)),
),
],
),
),
floatingActionButton: FloatingActionButton(
onPressed: _incrementCounter,
tooltip: 'Increment',
child: Icon(Icons.add),
),
);
}
}
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