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| import 'package:flutter/material.dart';
import 'ItemPage.dart';
void main() { runApp(new MaterialApp( home: HomePage(), )); }
class HomePage extends StatefulWidget { @override _MyState createState() => _MyState(); }
class _MyState extends State<HomePage> { int _currentIndex = 0; List<ItemPage> items = List(); List<NavItem> _navItem = List();
onIndexChanged(int index) { setState(() { _currentIndex = index; }); }
@override void initState() { items.add(ItemPage("主页", Colors.blueAccent)); items.add(ItemPage("归档", Colors.redAccent)); items.add(ItemPage("订阅", Colors.yellowAccent)); items.add(ItemPage("设置", Colors.greenAccent));
_navItem.add(NavItem(title: "主页", icon: Icons.home)); _navItem.add(NavItem(title: "归档", icon: Icons.business_center)); _navItem.add(NavItem(title: "订阅", icon: Icons.cast)); _navItem.add(NavItem(title: "设置", icon: Icons.settings)); super.initState(); }
@override void dispose() { super.dispose(); }
@override Widget build(BuildContext context) { return Container( child: Row( children: [ Drawer( child: Column( children: [ DrawerHeader( padding: EdgeInsets.all(0), child: Container( color: Colors.blueAccent, child: Center( child: Text( "Flutter Web", style: TextStyle(fontSize: 22, color: Colors.white), ), ), ), ), for (var d in _navItem) ListTile( leading: Icon(d.icon), title: Text(d.title), selected: _navItem.indexOf(d) == _currentIndex, onTap: () => onIndexChanged(_navItem.indexOf(d)), ), ], ), ), VerticalDivider( width: 1, thickness: 1, color: Colors.grey[300], ), Expanded( child: Scaffold( appBar: AppBar(), body: items[_currentIndex], floatingActionButton: FloatingActionButton( child: Icon(Icons.wb_sunny), ), ), ), ], )); } }
class NavItem { final String title; final IconData icon;
const NavItem({ @required this.title, @required this.icon, }); }
class ItemPage extends StatelessWidget { final String _title; final Color _color;
ItemPage(this._title, this._color);
@override Widget build(BuildContext context) { return Container( padding: EdgeInsets.all(30), color: Colors.white70, child: Center( child: Text( _title, style: TextStyle(fontSize: 25, color: _color), ), ), ); } }
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