问题描述
基本上，我想从列表视图更新数据。单击按钮编辑时，它将显示列表视图中的数据。这是我的照片。myhomesupervisor updateSupervisor。我已经使用了很多方法来显示，但仍然一无所获。
这是我的代码。
功能更新。
// update data supervisor
Future updateData(NewUser newUser) async {
return supervisorCollection.document(newUser.id).updateData({
'name': name,'email': email,'nophone': nophone,'uniqueID': uniqueID,});
}
HomeSupervisor类
import 'package:cloud_firestore/cloud_firestore.dart';
import 'package:finalyearproject/model/NewUser.dart';
import 'package:flutter/material.dart';
import 'package:finalyearproject/screen/crud/UpdateSupervisor.dart';
import 'package:finalyearproject/screen/crud/AddSupervisor.dart';
import 'package:finalyearproject/sidebar/AdminDrawer.dart';
import 'package:provider/provider.dart';
NewUser user;
class HomeSupervisor extends StatelessWidget {
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
backgroundColor: Colors.redAccent,title: Text('Supervisor'),actions: <Widget>[
IconButton(
icon: Icon(
Icons.add,color: Colors.white,),onPressed: () {
Navigator.push(context,MaterialPageRoute(builder: (context) => AddSupervisor()));
})
],drawer: AdminDrawer(),body: ListSupervisor(),);
}
}
class ListSupervisor extends StatefulWidget {
@override
_ListSupervisorState createState() => _ListSupervisorState();
}
class _ListSupervisorState extends State<ListSupervisor> {
String email;
String name;
String nophone;
String uniqueID;
@override
Widget build(BuildContext context) {
return Container(
child: StreamBuilder(
stream: Firestore.instance.collection('Supervisor').snapshots(),builder: (_,snapshot) {
if (snapshot.connectionState == ConnectionState.waiting) {
return Center(
child: Text("Loading..."),);
} else {
return ListView.builder(
itemCount: snapshot.data.documents.length,itemBuilder: (_,index) {
DocumentSnapshot sv = snapshot.data.documents[index];
return Card(
child: ListTile(
title: Container(
alignment: Alignment.centerLeft,child: Column(
children: <Widget>[
SizedBox(height: 5.0),Container(alignment: Alignment.centerLeft,child: Text(sv['name']),SizedBox(height: 5.0),child: Text(sv['email']),child: Text(sv['uniqueID']),)
],trailing: Row(
mainAxisSize: MainAxisSize.min,children: <Widget>[
IconButton(
icon: Icon(Icons.delete),color: Colors.red,onPressed: (){
}
),IconButton(
icon: Icon(Icons.edit),color: Colors.black,onPressed: () {
Navigator.push(context,MaterialPageRoute(builder: (context) => UpdateSupervisor()));
}
),IconButton(
icon: Icon(Icons.share),onPressed: () {
}
),],)
),);
});
}
}),);
}
}
UpdateSupervisor类
import 'package:finalyearproject/model/NewUser.dart';
import 'package:finalyearproject/service/database.dart';
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
class UpdateSupervisor extends StatefulWidget {
final String name;
final String email;
final String uniqueID;
final String phone;
UpdateSupervisor({this.name,this.email,this.phone,this.uniqueID});
@override
_UpdateSupervisorState createState() => _UpdateSupervisorState();
}
class _UpdateSupervisorState extends State<UpdateSupervisor> {
TextEditingController _name = new TextEditingController();
TextEditingController _email = new TextEditingController();
TextEditingController _nophone = new TextEditingController();
TextEditingController _uniqueID = new TextEditingController();
// form values
String name;
String email;
String uniqueID;
String phone;
final GlobalKey<FormState> _formKey = GlobalKey();
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text('Edit Supervisor'),backgroundColor: Colors.redAccent,body: Form(
key: _formKey,child: SingleChildScrollView(
padding: const EdgeInsets.all(16.0),child: Column(
crossAxisAlignment: CrossAxisAlignment.end,children: <Widget>[
SizedBox(height: 25.0),TextFormField(
decoration: InputDecoration(
hintText: 'Name',border: OutlineInputBorder(borderRadius: BorderRadius.circular(5))),keyboardType: TextInputType.text,controller: _name,validator: (value) => value.isEmpty ? 'Name cannot be empty!': null,onChanged: (value) {
setState(() => name = value);
},SizedBox(height: 10.0),TextFormField(
decoration: InputDecoration(
hintText: 'Email',keyboardType: TextInputType.emailAddress,controller: _email,validator: (value) => value.isEmpty ? 'Email cannot be empty!': null,onChanged: (value) {
setState(() => email = value);
},TextFormField(
decoration: InputDecoration(
hintText: 'Number Phone',keyboardType: TextInputType.number,controller: _nophone,validator: (value) => value.isEmpty ? 'Number Phone cannot be empty!': null,onChanged: (value) {
setState(() => phone = value);
},TextFormField(
decoration: InputDecoration(
hintText: 'Unique ID ',controller: _uniqueID,validator: (value) => value.isEmpty ? 'Ic number cannot be empty!': null,onChanged: (value) {
setState(() => uniqueID = value);
},const SizedBox(height: 20.0),RaisedButton(
color: Colors.redAccent,textColor: Colors.black,child: Text("Update"),onPressed: () async {
if(_formKey.currentState.validate()){
DatabaseService().updateData(NewUser(name: name,email: email,nophone: phone,uniqueID: uniqueID));
_formKey.currentState.save();
}
}
),)
);
}
}
我已经使用StreamBuilder将列表视图中的数据显示到文本字段中，但是仍然没有任何结果。而且也使用提供程序，但是过程太慢，因为我的案例涉及许多小部件。然后，现在我想尝试简单的方法，但仍然一无所获。有人可以帮助我或给我任何解决方案吗？
解决方法
暂无找到可以解决该程序问题的有效方法，小编努力寻找整理中！
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