Refresh
sample.packages.flutter.lib.src.cupertino.refresh.268.
When the user scrolls past [refreshTriggerPullDistance], this sample shows the default iOS pull to refresh indicator for 1 second and adds a new item to the top of the list view.
import 'package:flutter/cupertino.dart';
void main() => runApp(const MyApp());
class MyApp extends StatelessWidget {
const MyApp({Key? key}) : super(key: key);
static const String _title = 'Flutter Code Sample';
@override
Widget build(BuildContext context) {
return const CupertinoApp(
title: _title,
home: MyStatefulWidget(),
);
}
}
class MyStatefulWidget extends StatefulWidget {
const MyStatefulWidget({Key? key}) : super(key: key);
@override
State createState() => _MyStatefulWidgetState();
}
class _MyStatefulWidgetState extends State {
List colors = [
CupertinoColors.systemYellow,
CupertinoColors.systemOrange,
CupertinoColors.systemPink,
];
List items = [
Container(color: CupertinoColors.systemPink, height: 100.0),
Container(color: CupertinoColors.systemOrange, height: 100.0),
Container(color: CupertinoColors.systemYellow, height: 100.0),
];
@override
Widget build(BuildContext context) {
return CupertinoPageScaffold(
child: CustomScrollView(
physics: const BouncingScrollPhysics(
parent: AlwaysScrollableScrollPhysics(),
),
slivers: [
const CupertinoSliverNavigationBar(
largeTitle: Text('Scroll down'),
),
CupertinoSliverRefreshControl(
onRefresh: () async {
await Future.delayed(
const Duration(milliseconds: 1000),
);
setState(() {
items.insert(
0,
Container(color: colors[items.length % 3], height: 100.0),
);
});
},
),
SliverList(
delegate: SliverChildBuilderDelegate(
(BuildContext context, int index) => items[index],
childCount: items.length,
),
),
],
),
);
}
}
SHARE: