// Copyright 2014 The Flutter Authors. All rights reserved. // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. /// Flutter code sample for [CupertinoSliverRefreshControl]. import 'package:flutter/cupertino.dart'; void main() => runApp(const RefreshControlApp()); class RefreshControlApp extends StatelessWidget { const RefreshControlApp({super.key}); @override Widget build(BuildContext context) { return const CupertinoApp( theme: CupertinoThemeData(brightness: Brightness.light), home: RefreshControlExample(), ); } } class RefreshControlExample extends StatefulWidget { const RefreshControlExample({super.key}); @override State<RefreshControlExample> createState() => _RefreshControlExampleState(); } class _RefreshControlExampleState extends State<RefreshControlExample> { List<Color> colors = <Color>[ CupertinoColors.systemYellow, CupertinoColors.systemOrange, CupertinoColors.systemPink, ]; List<Widget> items = <Widget>[ 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( navigationBar: const CupertinoNavigationBar( middle: Text('CupertinoSliverRefreshControl Sample'), ), child: CustomScrollView( physics: const BouncingScrollPhysics( parent: AlwaysScrollableScrollPhysics(), ), slivers: <Widget>[ const CupertinoSliverNavigationBar( largeTitle: Text('Scroll down'), ), CupertinoSliverRefreshControl( onRefresh: () async { await Future<void>.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, ), ), ], ), ); } }