我正在尝试使用Flutter，并试图更改应用中BottomNavigationBar的颜色，但我只能实现更改BottomNavigationItem（图标和文本）的颜色。
以下是我声明BottomNavigationBar的地方：
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，我曾试图通过在我的主应用程序主题中将canvasColor编辑为绿色来解决问题，但它却破坏了整个应用程序的颜色方案。
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(),
);
}
}
