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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),
),
),
);
}
}
|
