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[英]How can I implement a Blurred Background effect of Scaffold or the bottomNavigationBar in Flutter?
[英]Can I Scaffold bottomNavigationBar wrap ListView?
我在想——如果我需要更多的底部菜單元素——我可以將我的 Scaffold bottomNavigationBar 包裝到 ListView 並水平滾動它嗎?
// below code is wrong, but it shows my idea clearly (I suppose :) )
// piece of Scaffold
bottomNavigationBar: BottomNavigationBar(
items: [
ListView(
children: [
BottomNavigationBarItem(icon: Icon(Icons.home), label: "Q"),
BottomNavigationBarItem(
icon: Icon(Icons.contact_mail), label: "W"),
BottomNavigationBarItem(
icon: Icon(Icons.contact_page), label: "E"),
BottomNavigationBarItem(icon: Icon(Icons.search), label: "R"),
],
)
],
),
當您的bottomNavigationBar
有 3 個或更多項目時,您不需要ListView
。 您只需要在您的bottomNavigationBar下添加type: BottomNavigationBarType.fixed
bottomNavigationBar: BottomNavigationBar()
一個例子:-
bottomNavigationBar: BottomNavigationBar(
type: BottomNavigationBarType.fixed, // This is all you need!
items: // ...,
)
欲了解更多信息,請訪問以下鏈接。
使用 BottomAppBar:
bottomNavigationBar: BottomAppBar(
child: ListView(
或者
另一種方法是使用 Tabbar:
import 'package:flutter/material.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 MaterialApp(
title: _title,
home: MyStatelessWidget(),
);
}
}
class MyStatelessWidget extends StatelessWidget {
const MyStatelessWidget({Key? key}) : super(key: key);
@override
Widget build(BuildContext context) {
return DefaultTabController(
initialIndex: 1,
length: 9,
child: Scaffold(
appBar: AppBar(
title: const Text('TabBar Widget'),
),
body: Column(
children: [
Expanded(
child: const TabBarView(
children: <Widget>[
Center(
child: Text("It's cloudy here"),
),
Center(
child: Text("It's rainy here"),
),
Center(
child: Text("It's sunny here"),
),
Center(
child: Text("It's cloudy here"),
),
Center(
child: Text("It's rainy here"),
),
Center(
child: Text("It's sunny here"),
),
Center(
child: Text("It's cloudy here"),
),
Center(
child: Text("It's rainy here"),
),
Center(
child: Text("It's sunny here"),
),
],
),
),
Container(
color: Colors.blue,
child: const TabBar(
isScrollable: true,
tabs: <Widget>[
Tab(
icon: Icon(Icons.cloud_outlined),
),
Tab(
icon: Icon(Icons.beach_access_sharp),
),
Tab(
icon: Icon(Icons.brightness_5_sharp),
),
Tab(
icon: Icon(Icons.cloud_outlined),
),
Tab(
icon: Icon(Icons.beach_access_sharp),
),
Tab(
icon: Icon(Icons.brightness_5_sharp),
),
Tab(
icon: Icon(Icons.cloud_outlined),
),
Tab(
icon: Icon(Icons.beach_access_sharp),
),
Tab(
icon: Icon(Icons.brightness_5_sharp),
),
],
),
),
],
),
),
);
}
}
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