My code for a page is like this. i need to scroll part below appbar.
@override
Widget build(BuildContext context) {
return new Scaffold(
appBar: new AppBar(... ),
body: new Stack(
children: <Widget>[
new Container(
decoration: BoxDecoration(
image: DecorationImage(...),
new Column(children: [
new Container(...),
new Container(...... ),
new Padding(
child: SizedBox(
child: RaisedButton(..),
),
new Divider(),
new Column(
children: <Widget>[
new Container(
child: new Row(
children: <Widget>[
new Expanded(
child: new Text( ),
),
new IconButton(
icon: IconButton(..),
onPressed: () {
_changed(true, "type");
},
),
],
),
),
visibilityPropertyType
? new Container(
margin: EdgeInsets.all(24.0),
child: new Column(
children: <Widget>[
new Row(
children: <Widget>[
new Expanded(... ),
new RaisedButton(..)
],
),
new Padding(
padding: const EdgeInsets.only(top: 10.0),
child: new Row(
mainAxisAlignment:
MainAxisAlignment.spaceEvenly,
children: <Widget>[
new Column(
children: <Widget>[
new Row(
children: <Widget>[.. ]),
new Row(
children: <Widget>[]),
new Row(
children: <Widget>[]),
new Row(
children: <Widget>[],
),
new Column(
children: <Widget>[
new Row(
children: <Widget>[],
),
],
),
],
),
),
],
))
: new Container(),
],
),
new Divider(
color: Colors.white,
)
])
],
),
);
}
I need to make body part scrollable. How can i implement that scroll.
If there is any custom scroll method existing. i have tried Scrollable and SingleChildScrollView but does not meet up with my needs.
When i used SinglechildScrollView it occurs an error BoxConstraints forces an infinite height. if i removed LayoutBuilder it causes A RenderFlex overflowed by 22 pixels on the bottom error
This question is related to
dart
scrollview
flutter
flutter-layout
Look to this, may be help you.
class ScrollView extends StatelessWidget {
@override
Widget build(BuildContext context) {
return new LayoutBuilder(
builder:
(BuildContext context, BoxConstraints viewportConstraints) {
return SingleChildScrollView(
scrollDirection: Axis.vertical,
child: ConstrainedBox(
constraints: BoxConstraints(minHeight: viewportConstraints.maxHeight),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Text("Hello world!!"),
//You can add another children
]),
),
);
},
);
}
}
Use LayoutBuilder and Get the output you want
Wrap the SingleChildScrollView with LayoutBuilder and implement the Builder function.
we can use a LayoutBuilder to get the box contains or the amount of space available.
LayoutBuilder(
builder: (BuildContext context, BoxConstraints constraints){
return SingleChildScrollView(
child: Stack(
children: <Widget>[
Container(
height: constraints.maxHeight,
),
topTitle(context),
middleView(context),
bottomView(context),
],
),
);
}
)
Two way to add Scroll in page
1. Using SingleChildScrollView :
SingleChildScrollView(
child: Column(
children: [
Container(....),
SizedBox(...),
Container(...),
Text(....)
],
),
),
2. Using ListView : ListView is default provide Scroll no need to add extra widget for scrolling
ListView(
children: [
Container(..),
SizedBox(..),
Container(...),
Text(..)
],
),
Thanks guys for help. From your suggestions i reached a solution like this.
new LayoutBuilder(
builder:
(BuildContext context, BoxConstraints viewportConstraints) {
return SingleChildScrollView(
child: ConstrainedBox(
constraints:
BoxConstraints(minHeight: viewportConstraints.maxHeight),
child: Column(children: [
// remaining stuffs
]),
),
);
},
)
you can scroll any part of content in two ways ...
most of the time i use List view directly when ever there is a keybord intraction in that specific screen so that the content dont get overlap by the keyboard and more over scrolls to top ....
this trick will be helpful many a times....
Very easy if you are already using a statelessWidget checkOut my code
class _MyThirdPage extends StatelessWidget {
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text('Understanding Material-Cards'),
),
body: SingleChildScrollView(
child: Column(
children: <Widget>[
_buildStack(),
_buildCard(),
SingleCard(),
_inkwellCard()
],
)),
);
}
}
You can try CustomScrollView. Put your CustomScrollView inside Column Widget.
Just for example -
class App extends StatelessWidget {
App({Key key}): super(key: key);
@override
Widget build(BuildContext context) {
return new Scaffold(
appBar: AppBar(
title: const Text('AppBar'),
),
body: new Container(
constraints: BoxConstraints.expand(),
decoration: new BoxDecoration(
image: new DecorationImage(
alignment: Alignment.topLeft,
image: new AssetImage('images/main-bg.png'),
fit: BoxFit.cover,
)
),
child: new Column(
children: <Widget>[
Expanded(
child: new CustomScrollView(
scrollDirection: Axis.vertical,
shrinkWrap: false,
slivers: <Widget>[
new SliverPadding(
padding: const EdgeInsets.symmetric(vertical: 0.0),
sliver: new SliverList(
delegate: new SliverChildBuilderDelegate(
(context, index) => new YourRowWidget(),
childCount: 5,
),
),
),
],
),
),
],
)),
);
}
}
In above code I am displaying a list of items ( total 5) in CustomScrollView.
YourRowWidget widget gets rendered 5 times as list item. Generally you should render each row based on some data.
You can remove decoration property of Container widget, it is just for providing background image.
You can use this one and it's best practice.
SingleChildScrollView( child: Column( children: <Widget>[ //Your Widgets //Your Widgets, //Your Widgets ], ), );
Source: Stackoverflow.com