Flutter 抽屉至底部导航杆摆动
我原来有一个汉堡吧,它打开一个抽屉在页面之间导航,我想把它改成底部导航栏,但我有点挣扎。这是底部导航栏的代码:Flutter 抽屉至底部导航杆摆动,flutter,bottomnavigationview,Flutter,Bottomnavigationview,我原来有一个汉堡吧,它打开一个抽屉在页面之间导航,我想把它改成底部导航栏,但我有点挣扎。这是底部导航栏的代码: class MyStatefulWidget extends StatefulWidget { MyStatefulWidget({Key key}) : super(key: key); @override _MyStatefulWidgetState createState() => _MyStatefulWidgetState(); } /// This i
class MyStatefulWidget extends StatefulWidget {
MyStatefulWidget({Key key}) : super(key: key);
@override
_MyStatefulWidgetState createState() => _MyStatefulWidgetState();
}
/// This is the private State class that goes with MyStatefulWidget.
class _MyStatefulWidgetState extends State<MyStatefulWidget> {
int _selectedIndex = 0;
static const TextStyle optionStyle =
TextStyle(fontSize: 30, fontWeight: FontWeight.bold);
static const List<Widget> _widgetOptions = <Widget>[
Text(
'Index 0: Home',
style: optionStyle,
),
Text(
'Index 1: Business',
style: optionStyle,
),
Text(
'Index 2: School',
style: optionStyle,
),
];
void _onItemTapped(int index) {
setState(() {
_selectedIndex = index;
});
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: const Text('BottomNavigationBar Sample'),
),
body: Center(
child: _widgetOptions.elementAt(_selectedIndex),
),
bottomNavigationBar: BottomNavigationBar(
items: const <BottomNavigationBarItem>[
BottomNavigationBarItem(
icon: Icon(Icons.home),
label: 'Home',
),
BottomNavigationBarItem(
icon: Icon(Icons.business),
label: 'Business',
),
BottomNavigationBarItem(
icon: Icon(Icons.school),
label: 'School',
),
],
currentIndex: _selectedIndex,
selectedItemColor: Colors.amber[800],
onTap: _onItemTapped,
),
);
}
}
类MyStatefulWidget扩展StatefulWidget{
MyStatefulWidget({Key}):超级(Key:Key);
@凌驾
_MyStatefulWidgetState createState()=>\u MyStatefulWidgetState();
}
///这是MyStatefulWidget附带的私有状态类。
类_MyStatefulWidgetState扩展状态{
int _selectedIndex=0;
静态常量文本样式选项样式=
TextStyle(fontSize:30,fontWeight:fontWeight.bold);
静态常量列表_widgetOptions=[
正文(
'索引0:主',
样式:可选样式,
),
正文(
"指数1:业务",,
样式:可选样式,
),
正文(
"索引2:学校",,
样式:可选样式,
),
];
void\u未映射(整数索引){
设置状态(){
_selectedIndex=索引;
});
}
@凌驾
小部件构建(构建上下文){
返回脚手架(
appBar:appBar(
标题:常量文本(“底部导航栏示例”),
),
正文:中(
子项:_widgetOptions.elementAt(_selectedIndex),
),
底部导航栏:底部导航栏(
项目:常数[
底部导航气压计(
图标:图标(Icons.home),
标签:“家”,
),
底部导航气压计(
图标:图标(Icons.business),
标签:“业务”,
),
底部导航气压计(
图标:图标(Icons.school),
标签:“学校”,
),
],
currentIndex:_selectedIndex,
selectedItemColor:Colors.amber[800],
onTap:\u未映射,
),
);
}
}
我的主页的所有代码都在这样一个类中:
class FirstRoute extends StatefulWidget {
FirstRoute({Key key, this.title}) : super(key: key);
final String title;
@override
_FirstRoute createState() => _FirstRoute();
}
class _FirstRoute extends State<FirstRoute> {
@override
Widget build(BuildContext context) {
class FirstRoute扩展StatefulWidget{
FirstRoute({Key-Key,this.title}):super(Key:Key);
最后的字符串标题;
@凌驾
_FirstRoute createState();
}
类_FirstRoute扩展状态{
@凌驾
小部件构建(构建上下文){
我不知道如何把它放到导航栏底部的Widget部分,在那里Text()
部分是。
我不熟悉使用flatter,因此非常感谢您的帮助。这里您需要做的就是用小部件/屏幕替换文本小部件 范例
static List<Widget> _widgetOptions = <Widget>[
FirstRoute(),
SecondRoute(),
ThirdRoute(),
];
静态列表\u widgetOptions=[
FirstRoute(),
SecondRoute(),
三十醇(),
];
您好,只要您删除常量,这就行了,谢谢!!非常高兴它能工作。