我的颤振应用程序底部有一个底部导航栏。它工作得很好。我还有一个需要填写文本字段的页面。填写完文本字段后，用户可以单击“保存”按钮。保存数据后，我将用户导航到仪表板屏幕。
问题：当我从我使用的数据输入页面导航时
Navigator.of(context).pushReplacement(MaterialPageRoute(
builder: (context) => AgentDashboardScreen()));
上述行在“保存”按钮代码中。
导航到仪表板页面。这是在底部导航功能之外的，所以当我到达仪表板时，底部导航栏消失了。
BottomNavigation 位于 main_screen.dart 页面中，它的作用类似于容器，因此我需要在容器内导航。下面是 main_screen.dart 的代码
class MainScreen extends StatefulWidget {
@override
_MainScreenState createState() => _MainScreenState();
}
class _MainScreenState extends State<MainScreen> {
int _pageIndex = 0;
List<Widget> pageList = <Widget>[
AgentDashboardScreen(),
TransactionDetailScreen(),
AgentProfileScreen(),
];
@override
Widget build(BuildContext context) {
return Scaffold(
body: pageList[_pageIndex],
resizeToAvoidBottomInset: true,
bottomNavigationBar: BottomNavigationBar(
backgroundColor: Colors.blueAccent,
selectedIconTheme: IconThemeData(color: Colors.white),
selectedItemColor: Colors.white,
unselectedItemColor: Colors.black45,
type: BottomNavigationBarType.fixed,
currentIndex: _pageIndex,
onTap: (value) {
setState(() {
_pageIndex = value;
});
},
items: [
BottomNavigationBarItem(icon: Icon(Icons.home), label: "Home"),
BottomNavigationBarItem(icon: Icon(Icons.add_business_outlined), label: "Add Tran"),
BottomNavigationBarItem(icon: Icon(Icons.people), label: "Profile"),
BottomNavigationBarItem(icon: Icon(Icons.adjust), label: "Logout"),
],
),
);
}
}
这是数据输入页面的代码
class AgentProfileScreen extends StatefulWidget {
static const String id = 'agent_profile_screen';
final Agents agents;
AgentProfileScreen([this.agents]);
@override
_AgentProfileScreenState createState() => _AgentProfileScreenState();
}
class _AgentProfileScreenState extends State<AgentProfileScreen> {
final _db = FirebaseFirestore.instance;
@override
Widget build(BuildContext context) {
// Get the stream of agents created in main.dart
final agentProvider = Provider.of<AgentProvider>(context);
final _firestoreService = FirestoreService();
//String _chosenState = 'Select State';
return Scaffold(
appBar: AppBar(
title: Row(
mainAxisAlignment: MainAxisAlignment.center,
children: [
Image.asset('assets/images/Appbar_logo.png',
fit: BoxFit.cover, height: 56),
],
),
),
backgroundColor: Colors.white,
body: SafeArea(
child: SingleChildScrollView(
child: Padding(
padding: const EdgeInsets.all(20.0),
child: Column(
//mainAxisAlignment: MainAxisAlignment.center,
//crossAxisAlignment: CrossAxisAlignment.stretch,
children: <Widget>[
Text(
'Agent Profile',
style: TextStyle(
fontSize: 30,
),
),
SizedBox(
height: 8.0,
),
// Email entry text field
TextField(
controller: fNameController,
keyboardType: TextInputType.text,
textAlign: TextAlign.center,
onChanged: (value) {
agentProvider.changefName(value);
},
decoration: kTextFieldDecoration.copyWith(
hintText: 'First Name', labelText: 'First Name'),
),
SizedBox(
height: 8.0,
),
TextField(
controller: lNameController,
keyboardType: TextInputType.text,
textAlign: TextAlign.center,
onChanged: (value) {
agentProvider.changelName(value);
},
decoration: kTextFieldDecoration.copyWith(
hintText: 'Last Name', labelText: 'Last Name'),
),
SizedBox(
height: 8.0,
),
Container(
child: StreamBuilder(
stream: _db.collection('agency').snapshots(),
builder: (BuildContext context, AsyncSnapshot snapshot) {
if (snapshot.data == null) {
return Center(
child: CircularProgressIndicator(),
);
} else {
return new DropdownButton<String>(
hint: new Text("Select Agency"),
value: _currentAgency,
onChanged: changedDropDownAgency,
items: snapshot.data.docs
.map<DropdownMenuItem<String>>((document) {
return new DropdownMenuItem<String>(
value: document.id,
child: new Text(document.data()['name']),
);
}).toList(),
);
}
}),
),
SizedBox(
height: 8.0,
),
TextField(
controller: address1Controller,
keyboardType: TextInputType.text,
textAlign: TextAlign.center,
onChanged: (value) {
agentProvider.changeaddress1(value);
},
decoration: kTextFieldDecoration.copyWith(
hintText: 'Address 1', labelText: 'Address 1'),
),
SizedBox(
height: 8.0,
),
TextField(
controller: address2Controller,
textAlign: TextAlign.center,
onChanged: (value) {
agentProvider.changeaddress2(value);
},
decoration: kTextFieldDecoration.copyWith(
hintText: 'Address 2', labelText: 'Address 2'),
),
SizedBox(
height: 8.0,
),
TextField(
controller: cityController,
keyboardType: TextInputType.emailAddress,
textAlign: TextAlign.center,
onChanged: (value) {
agentProvider.changecity(value);
},
decoration: kTextFieldDecoration.copyWith(
hintText: 'City', labelText: 'City'),
),
SizedBox(
height: 8.0,
),
DropdownButton(
value: _currentAgentState,
items: _dropDownState,
hint: Text('Choose State'),
onChanged: changedDropDownState,
),
SizedBox(
height: 8.0,
),
TextField(
controller: zipController,
keyboardType: TextInputType.number,
textAlign: TextAlign.center,
onChanged: (value) {
agentProvider.changezipCode(value);
},
decoration: kTextFieldDecoration.copyWith(
hintText: 'Zip Code', labelText: 'Zip Code'),
),
SizedBox(
height: 8.0,
),
TextField(
controller: cellPhoneController,
keyboardType: TextInputType.phone,
textAlign: TextAlign.center,
onChanged: (value) {
agentProvider.changecellPhone(value);
},
decoration: kTextFieldDecoration.copyWith(
hintText: 'Cell Phone', labelText: 'Cell Phone'),
),
SizedBox(
height: 8.0,
),
TextField(
controller: officePhoneController,
keyboardType: TextInputType.phone,
textAlign: TextAlign.center,
onChanged: (value) {
agentProvider.changeofficePhone(value);
},
decoration: kTextFieldDecoration.copyWith(
hintText: 'Office Phone', labelText: 'Office Phone'),
),
SizedBox(
height: 8.0,
),
RoundedButton(
title: 'Save',
colour: Colors.blueAccent,
onPressed: () async {
setState(() {
showSpinner = true;
});
try {
agentProvider.saveAgent();
globals.currentAgentName = fNameController.value.text + ' ' + lNameController.value.text;
globals.currentAgentState = _currentAgentState;
await _firestoreService.saveDeviceToken();
Navigator.of(context).pushReplacement(MaterialPageRoute(
builder: (context) => AgentDashboardScreen()));
setState(() {
showSpinner = false;
});
} catch (e) {
// todo: add better error handling
print(e);
}
},
),
SizedBox(
height: 8.0,
),
(widget != null)
? RoundedButton(
title: 'Delete',
colour: Colors.red,
onPressed: () async {
setState(() {
showSpinner = true;
});
try {
agentProvider.deleteAgent(globals.currentUid);
Navigator.pushNamed(
context, AgentDashboardScreen.id);
setState(() {
showSpinner = false;
});
} catch (e) {
// todo: add better error handling
print(e);
}
},
)
: Container()
],
),
),
),
),
floatingActionButton: FloatingActionButton(
onPressed: () async {
setState(() {
showSpinner = true;
});
try {
agentProvider.saveAgent();
Navigator.push(
context,
new MaterialPageRoute(
builder: (context) => AgentDashboardScreen(),
),
);
setState(() {
showSpinner = false;
});
} catch (e) {
// todo: add better error handling
print(e);
}
},
backgroundColor: kPrimaryColor,
child: Icon(
Icons.assignment_turned_in_outlined,
color: Colors.blueAccent,
),
),
);
}
}