[英]Bottom sheet is not displaying on the bottom
單擊頁面上的浮動按鈕時,我想顯示底部工作表。 頁面還包括底部導航欄。 單擊浮動按鈕時,底部工作表顯示在導航欄上方而不是頁面底部。 我怎樣才能做到這一點?
代碼:
void main() {
runApp(App());
}
class App extends StatelessWidget {
// This widget is the root of your application.
@override
Widget build(BuildContext context) {
return MaterialApp(
debugShowCheckedModeBanner: false,
title: 'app',
theme: ThemeData(
primarySwatch: Colors.blue,
visualDensity: VisualDensity.adaptivePlatformDensity,
),
home: AppNavigation(),
);
}
}
class AppNavigation extends StatefulWidget {
@override
_AppNavigationState createState() => _AppNavigationState();
}
class _AppNavigationState extends State<AppNavigation> {
int _currentIndex = 0;
final List<Widget> _children = [
HomeScreen(),
SettingsScreen(),
];
void onTappedBar(int index) {
setState(() {
_currentIndex = index;
});
}
@override
Widget build(BuildContext context) {
return Scaffold(
body: _children[_currentIndex],
bottomNavigationBar: BottomNavigationBar(
onTap: onTappedBar,
currentIndex: _currentIndex,
items: <BottomNavigationBarItem>[
BottomNavigationBarItem(
icon: Icon(Icons.home), title: Text('Home')),
BottomNavigationBarItem(
icon: Icon(Icons.settings), title: Text('Settings')),
]),
);
}
}
class HomeScreen extends StatelessWidget {
@override
Widget build(BuildContext context) {
var size = MediaQuery.of(context).size; // gives device width and height
return Scaffold(
floatingActionButton: FloatingActionButton(
onPressed: () {
showBottomSheet(
context: context,
builder: (context) => Container(
height: 320,
decoration: BoxDecoration(
boxShadow: [
BoxShadow(
color: Colors.grey.withOpacity(0.5),
spreadRadius: 5,
blurRadius: 20,
offset: Offset(0, 3),
),
],
color: Colors.white,
borderRadius: BorderRadius.only(
topLeft: Radius.circular(25),
topRight: Radius.circular(25),
),
),
padding:
EdgeInsets.symmetric(horizontal: 20, vertical: 30),
child: Center(child: Text('Bottom action sheet')),
));
},
child: Icon(Icons.add),
backgroundColor: Colors.deepPurple),
body: Center(child: Text("home page")));
}
}
下面是上述代碼的 output。底部操作表出現在底部導航欄上方。 我希望底部動作應該在屏幕底部。
我相信您要實現的目標是通過使用“showModalBottomSheet”來完成,如下所示:
return Scaffold(
resizeToAvoidBottomInset: false,
floatingActionButton: FloatingActionButton(
onPressed: () {
// what you asked for
showModalBottomSheet(
barrierColor: Colors.white.withOpacity(0),
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.vertical(
top: Radius.circular(25),
),
),
context: context,
builder: (context) => Container(
height: 320,
decoration: BoxDecoration(
boxShadow: [
BoxShadow(
color: Colors.grey.withOpacity(0.5),
spreadRadius: 5,
blurRadius: 20,
offset: Offset(0, 3),
),
],
color: Colors.white,
borderRadius: BorderRadius.only(
topLeft: Radius.circular(25),
topRight: Radius.circular(25),
),
),
padding:
EdgeInsets.symmetric(horizontal: 20, vertical: 30),
child: Center(child: Text('Bottom action sheet')),
));
},
child: Icon(Icons.add),
backgroundColor: Colors.deepPurple),
body: Center(child: Text("home page")));
編輯:我已經修改了代碼,使其具有與您發布的圖片中相同的陰影效果
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