Flutter中的样式BottomNavigationBar
我正在尝试Flutter,并且尝试更改BottomNavigationBar
应用程序上的颜色,但是我能做的就是更改BottomNavigationItem
(图标和文本)的颜色。
这是我声明我的地方BottomNavigationBar
:
class _BottomNavigationState extends State<BottomNavigationHolder>{ @override
Widget build(BuildContext context) {
return new Scaffold(
appBar: null,
body: pages(),
bottomNavigationBar:new BottomNavigationBar(
items: <BottomNavigationBarItem>[
new BottomNavigationBarItem(
icon: const Icon(Icons.home),
title: new Text("Home")
),
new BottomNavigationBarItem(
icon: const Icon(Icons.work),
title: new Text("Self Help")
),
new BottomNavigationBarItem(
icon: const Icon(Icons.face),
title: new Text("Profile")
)
],
currentIndex: index,
onTap: (int i){setState((){index = i;});},
fixedColor: Colors.white,
),
);
}
早些时候我以为可以通过canvasColor
在主应用程序主题上将其编辑为绿色来解决这个问题,但它弄乱了整个应用程序的配色方案:
class MyApp extends StatelessWidget { // This widget is the root of your application.
@override
Widget build(BuildContext context) {
return new MaterialApp(
title: 'Flutter Demo',
theme: new ThemeData(
primarySwatch: Colors.blue,
canvasColor: Colors.green
),
home: new FirstScreen(),
);
}
}
回答:
没有其他选项可以指定的背景色,BottomNavigationBar
而只能更改canvasColor
。在不弄乱整个应用程序的情况下实现此目标的一种方法是将包裹BottomNavigationBar
在Theme
所需的中canvasColor
。
例:
bottomNavigationBar: new Theme( data: Theme.of(context).copyWith(
// sets the background color of the `BottomNavigationBar`
canvasColor: Colors.green,
// sets the active color of the `BottomNavigationBar` if `Brightness` is light
primaryColor: Colors.red,
textTheme: Theme
.of(context)
.textTheme
.copyWith(caption: new TextStyle(color: Colors.yellow))), // sets the inactive color of the `BottomNavigationBar`
child: new BottomNavigationBar(
type: BottomNavigationBarType.fixed,
currentIndex: 0,
items: [
new BottomNavigationBarItem(
icon: new Icon(Icons.add),
title: new Text("Add"),
),
new BottomNavigationBarItem(
icon: new Icon(Icons.delete),
title: new Text("Delete"),
)
],
),
),
希望有帮助!
以上是 Flutter中的样式BottomNavigationBar 的全部内容, 来源链接: utcz.com/qa/408064.html