Flutter: Stepper doesn't scrolling - flutter

Question

I am trying to make a button bellow Stepper. The problem is, if I wrap it in a Column or ListView, scrolling in Stepper doesn't work. I tried to wrap them by NestedScrollView, scrolling is working, but the problem is that the button posted above Stepper. There are two example of _MyHomePageState in code, first with ListView and second with NestedView, both do not work for me. How can I implement Stepper with Button under it?
This is what I want
enter image description here
import 'package:flutter/material.dart';
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
#override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
),
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();
}
// 1 case with ListView (doesn't scroll)
class _MyHomePageState extends State<MyHomePage> {
int _currentStep = 0;
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
backgroundColor: Colors.white,
iconTheme: IconThemeData(color: Colors.red),
),
body: Form(
child: ListView(
children: <Widget>[
Stepper(
type: StepperType.vertical,
currentStep: _currentStep,
onStepTapped: (int index) {
setState(() {
_currentStep = index;
});
},
steps: [
Step(
title: Text('Step 1'),
content: Column(
children: <Widget>[
TextFormField(
decoration: InputDecoration(
labelText: 'City', border: UnderlineInputBorder()),
),
TextFormField(
decoration: InputDecoration(labelText: 'Name'),
),
TextFormField(
decoration: InputDecoration(labelText: 'Address'),
),
],
),
isActive: true,
),
Step(
title: Text('Step 2'),
content: Column(
children: <Widget>[
TextFormField(
decoration: InputDecoration(labelText: 'City'),
),
TextFormField(
decoration: InputDecoration(labelText: 'Name'),
),
TextFormField(
decoration: InputDecoration(labelText: 'Address'),
),
],
),
isActive: true,
),
Step(
title: Text('Step 3'),
content: Column(
children: <Widget>[
TextFormField(
decoration: InputDecoration(labelText: 'Width'),
),
TextFormField(
decoration: InputDecoration(labelText: 'Length'),
),
TextFormField(
decoration: InputDecoration(labelText: 'Height'),
),
TextFormField(
decoration: InputDecoration(labelText: 'Weigth'),
),
],
),
isActive: true,
),
],
),
RaisedButton(
child: Text('Button'),
onPressed: () {},
)
],
),
),
);
}
}
// 2 case with NestedScrollView
class _MyHomePageState extends State<MyHomePage> {
int _currentStep = 0;
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
backgroundColor: Colors.white,
iconTheme: IconThemeData(color: Colors.red),
),
body: Form(
child: NestedScrollView(
headerSliverBuilder: (BuildContext context, bool innerBoxIsScrolled) {
return <Widget>[
SliverList(
delegate: SliverChildListDelegate(<Widget>[
RaisedButton(
child: Text('Button'),
onPressed: () {},
)
]),
),
];
},
body: Stepper(
type: StepperType.vertical,
currentStep: _currentStep,
onStepTapped: (int index) {
setState(() {
_currentStep = index;
});
},
steps: [
Step(
title: Text('Step 1'),
content: Column(
children: <Widget>[
TextFormField(
decoration: InputDecoration(
labelText: 'City', border: UnderlineInputBorder()),
),
TextFormField(
decoration: InputDecoration(labelText: 'Name'),
),
TextFormField(
decoration: InputDecoration(labelText: 'Address'),
),
],
),
isActive: true,
),
Step(
title: Text('Step 2'),
content: Column(
children: <Widget>[
TextFormField(
decoration: InputDecoration(labelText: 'City'),
),
TextFormField(
decoration: InputDecoration(labelText: 'Name'),
),
TextFormField(
decoration: InputDecoration(labelText: 'Address'),
),
],
),
isActive: true,
),
Step(
title: Text('Step 3'),
content: Column(
children: <Widget>[
TextFormField(
decoration: InputDecoration(labelText: 'Width'),
),
TextFormField(
decoration: InputDecoration(labelText: 'Length'),
),
TextFormField(
decoration: InputDecoration(labelText: 'Height'),
),
TextFormField(
decoration: InputDecoration(labelText: 'Weigth'),
),
],
),
isActive: true,
),
],
),
),
),
);
}
}

Answer 1

All you need is to add
physics: ClampingScrollPhysics(),
property inside Stepper since Listview is a scrollable widget.
I hope it solves your problem

Answer 2

If the button should be persistant on the bottom of the screen you could use the persistentFooterButtons property of the Scaffold widget, or the bottomNavigationBar property with a custom widget.