我正在开发我的第一个颤振应用程序，但是我真的是 firebase 和颤振的新手。
我的应用程序已经通过电子邮件和密码在 firebase 上进行身份验证，但我只知道如何向所有用户显示 db 集合，我想显示登录用户的具体数据。
现在我收到这个错误
'DocumentSnapshot' 类没有实例 getter 'documents'。接收方：“DocumentSnapshot”实例尝试调用：文档
但是当我调用文档时，它会显示一个新错误： 没有为“CollectionReference”类型定义方法“文档”。尝试将名称更正为现有方法的名称，或定义名为“文档”的方法。
我的登录代码
signIn() async {
if (_formKey.currentState.validate()) {
_formKey.currentState.save();
try {
getData() async{
String user = (await FirebaseAuth.instance.currentUser).uid;
return Firestore.instance.collection('users').document(user);
}
UserCredential user = await FirebaseAuth.instance
.signInWithEmailAndPassword(email: _email, password: _password);
getUserDoc();
Navigator.push(
context, MaterialPageRoute(builder: (context) => Home()));
}
catch (e) {
print(e.message);
}
}
}
}
主页代码
import 'dart:typed_data';
import 'package:cloud_firestore/cloud_firestore.dart';
import 'package:dio/dio.dart';
import 'package:firebase_auth/firebase_auth.dart';
import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'package:esys_flutter_share/esys_flutter_share.dart';
import 'dart:io';
import 'package:http/http.dart';
import 'package:flutter_cached_pdfview/flutter_cached_pdfview.dart';
import 'package:permission_handler/permission_handler.dart';
import 'package:flutter_downloader/flutter_downloader.dart';
import 'package:path_provider/path_provider.dart';
import 'package:image_viewer/image_viewer.dart';
class Home extends StatefulWidget {
@override
_HomeState createState() => _HomeState();
}
class _HomeState extends State<Home> {
int _currentIndex = 0;
Stream<DocumentSnapshot> getDatabase() async* {
FirebaseUser user = await FirebaseAuth.instance.currentUser;
yield* Firestore.instance
.collection('users')
.document(user.uid)
.snapshots();
}
final tabs = [
//TAB DE MANUAIS
Center(
child: (Scaffold(
body: StreamBuilder (
stream: FirebaseFirestore.instance.collection('users').document('user.uid').snapshots(),
builder: (context, snapshot) {
if (snapshot.data == null) return CircularProgressIndicator();
return Container(
padding: EdgeInsets.all(16),
child: ListView.builder(
itemCount: snapshot.data.documents.length,
itemBuilder: (context, index) {
DocumentSnapshot manuais =
snapshot.data.documents[index];
var dio = Dio();
return Card(
color: Colors.grey[250],
child: Container(
padding: EdgeInsets.all(10),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: <Widget>[
new Image.asset('Images/pdflogo.png', width: 32,
),
Center(
child: Text(
(manuais.data()['nome'].toString()),
maxLines: 1,
overflow: TextOverflow.ellipsis,
style: TextStyle(fontSize: 16),
),
),
ButtonBar(
children: <Widget>[
FlatButton(
child: const Text('Compartilhar / Download'),
onPressed: () async {
var request = await HttpClient().getUrl(Uri.parse(manuais.data()['documento']));
var response = await request.close();Uint8List bytes = await consolidateHttpClientResponseBytes(response);
await Share.file(
'ESYS AMLOG',
'Manual.pdf',
bytes,
'image/jpg');
}),
],
),
],
),
),
);
}),
);
})))),
//TAB DE PRODUCAO
Center(
child: (Scaffold(
body: StreamBuilder(
stream: FirebaseFirestore.instance.collection('producao').snapshots(),
builder: (context, snapshot) {
if (snapshot.data == null) return CircularProgressIndicator();
return Container(
padding: EdgeInsets.all(16),
child: ListView.builder(
itemCount: snapshot.data.documents.length,
itemBuilder: (context, index) {
DocumentSnapshot producao =
snapshot.data.documents[index];
return Card(
color: Colors.grey[250],
child: Container(
padding: EdgeInsets.all(10),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: <Widget>[
Center(
child: Image.network(producao.data()['img'].toString(), width: 260,
),
),
Text(
(producao.data()['data'].toString()),
maxLines: 1,
overflow: TextOverflow.ellipsis,
style: TextStyle(fontSize: 22),
),
Text(
(producao.data()['detail'].toString()),
style: TextStyle(fontSize: 16),
),
ButtonBar(
children: <Widget>[
FlatButton(
child: const Text('DETALHES'),
onPressed: () {
ImageViewer.showImageSlider(
images: [
(producao.data()['img']),
//List of images' URLs
],
);
}),
FlatButton(
child: const Text('COMPARTILHAR'),
onPressed: () async {
var request = await HttpClient().getUrl(Uri.parse(producao.data()['img']));
var response = await request.close();Uint8List bytes = await consolidateHttpClientResponseBytes(response);
await Share.file(
'ESYS AMLOG',
'amlog.jpg',
bytes,
'image/jpg'
);
}),
],
),
],
),
),
);
}),
);
})))),
Center(child: Text('Documentos')),
];
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(title: Text('Área do Cliente')),
body: tabs[_currentIndex],
bottomNavigationBar: BottomNavigationBar(
currentIndex: _currentIndex,
type: BottomNavigationBarType.shifting,
iconSize: 28,
items: [
BottomNavigationBarItem(
icon: Icon(Icons.picture_as_pdf),
title: Text('Manuais'),
backgroundColor: Colors.indigo),
BottomNavigationBarItem(
icon: Icon(Icons.build),
title: Text('Produção'),
backgroundColor: Colors.indigo),
BottomNavigationBarItem(
icon: Icon(Icons.folder),
title: Text('Documentos'),
backgroundColor: Colors.indigo,
)
],
onTap: (index) {
setState(() {
_currentIndex = index;
});
},
),
);
}
}
```