未找到：“dart:html”导入“dart:html”；我不需要 dart:html 我也没有使用过，但我尝试通过导入它，但错误不会发生
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【中文标题】未找到：“dart:html”导入“dart:html”；我不需要 dart:html 我也没有使用过，但我尝试通过导入它，但错误不会发生【英文标题】：Not found: 'dart:html' import 'dart:html'; I don't need dart:html and I also didn't used, but I tried by importing it, but the error isn't going 【发布时间】：2021-09-20 08:19:43 【问题描述】：我正在编写一个代码，在该代码中我正在使用 firebase 进行注册。包括个人资料图像在内的数据将被存储到火库中。但问题是我遇到了多个我无法解决的错误。我的应用程序甚至还没有运行一次。其中一个错误是 "import:dart:html" ，我检查了所有 dart 文件，但没有找到任何未使用的 dart:html 导入。我使用 import"dart.io" 作为术语“late File”。我也通过导入 dart:html 进行了尝试，但错误仍然相同。我也尝试删除 ProfileImage 的所有代码，但错误也仍然存在。以下是 y 代码有错误的所有文件：
错误
Launching lib\main.dart on sdk gphone x86 arm in debug mode...
Running Gradle task 'assembleDebug'...
Invalid depfile: D:\Noum\Data\Uni Data\Codes\android Studio\Flutter\firebase_flutter_app\.dart_tool\flutter_build\040ba043425f685efe2a35025cf4d63f\kernel_snapshot.d
Invalid depfile: D:\Noum\Data\Uni Data\Codes\Android Studio\Flutter\firebase_flutter_app\.dart_tool\flutter_build\040ba043425f685efe2a35025cf4d63f\kernel_snapshot.d
/C:/src/flutter/flutter/.pub-cache/hosted/pub.dartlang.org/firebase-9.0.1/lib/src/storage.dart:2:8: Error: Not found: 'dart:html'
import 'dart:html';
^
/C:/src/flutter/flutter/.pub-cache/hosted/pub.dartlang.org/firebase-9.0.1/lib/src/utils.dart:2:8: Error: Not found: 'dart:html'
import 'dart:html';
^
/C:/src/flutter/flutter/.pub-cache/hosted/pub.dartlang.org/js-0.6.3/lib/js.dart:8:1: Error: Not found: 'dart:js'
export 'dart:js' show allowInterop, allowInteropCaptureThis;
^
/C:/src/flutter/flutter/.pub-cache/hosted/pub.dartlang.org/js-0.6.3/lib/js_util.dart:8:1: Error: Not found: 'dart:js_util'
export 'dart:js_util';
^
/C:/src/flutter/flutter/.pub-cache/hosted/pub.dartlang.org/firebase-9.0.1/lib/src/auth.dart:340:25: Error: The method 'allowInterop' isn't defined for the class 'Auth'.
- 'Auth' is from 'package:firebase/src/auth.dart' ('/C:/src/flutter/flutter/.pub-cache/hosted/pub.dartlang.org/firebase-9.0.1/lib/src/auth.dart').
Try correcting the name to the name of an existing method, or defining a method named 'allowInterop'.
final nextWrapper = allowInterop((firebase_interop.UserJsImpl? user)
^^^^^^^^^^^^
/C:/src/flutter/flutter/.pub-cache/hosted/pub.dartlang.org/firebase-9.0.1/lib/src/auth.dart:344:26: Error: The method 'allowInterop' isn't defined for the class 'Auth'.
- 'Auth' is from 'package:firebase/src/auth.dart' ('/C:/src/flutter/flutter/.pub-cache/hosted/pub.dartlang.org/firebase-9.0.1/lib/src/auth.dart').
Try correcting the name to the name of an existing method, or defining a method named 'allowInterop'.
final errorWrapper = allowInterop((e) => changeController.addError(e));
^^^^^^^^^^^^
/C:/src/flutter/flutter/.pub-cache/hosted/pub.dartlang.org/firebase-9.0.1/lib/src/auth.dart:374:9: Error: The method 'allowInterop' isn't defined for the class 'Auth'.
- 'Auth' is from 'package:firebase/src/auth.dart' ('/C:/src/flutter/flutter/.pub-cache/hosted/pub.dartlang.org/firebase-9.0.1/lib/src/auth.dart').
Try correcting the name to the name of an existing method, or defining a method named 'allowInterop'.
allowInterop((firebase_interop.UserJsImpl? user)
^^^^^^^^^^^^
FAILURE: Build failed with an exception.
* Where:
Script 'C:\src\flutter\flutter\packages\flutter_tools\gradle\flutter.gradle' line: 1035
* What went wrong:
Execution failed for task ':app:compileFlutterBuildDebug'.
> Process 'command 'C:\src\flutter\flutter\bin\flutter.bat'' finished with non-zero exit value 1
* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.
* Get more help at https://help.gradle.org
BUILD FAILED in 43s
Exception: Gradle task assembleDebug failed with exit code 1
颤振医生
PS C:\Users\Nouma> flutter doctor
Doctor summary (to see all details, run flutter doctor -v):
[√] Flutter (Channel stable, 2.2.2, on Microsoft Windows [Version 10.0.19042.1052], locale en-PK)
[√] Android toolchain - develop for Android devices (Android SDK version 30.0.3)
[√] Chrome - develop for the web
[√] Android Studio (version 4.1.0)
[√] VS Code (version 1.57.1)
[√] Connected device (2 available)
• No issues found!
PS C:\Users\Nouma>
依赖关系
environment:
sdk: ">=2.12.0 <3.0.0"
dependencies:
flutter:
sdk: flutter
firebase_auth: ^2.0.0
firebase_core: ^1.3.0
auth_buttons: ^1.0.1+4
cloud_firestore: ^2.3.0
firebase_storage: ^9.0.0
google_sign_in: ^5.0.4
firebase_analytics: ^8.1.2
image_picker: ^0.8.1+3
shared_preferences: ^2.0.6
Register.dart ，这是编写所有代码的文件
import 'dart:io';
import 'package:cloud_firestore/cloud_firestore.dart';
import 'package:firebase/firebase.dart';
import 'package:firebase_auth/firebase_auth.dart' as route;
import 'package:firebase_flutter_app/ErrorAlertDialog.dart';
import 'package:firebase_flutter_app/StoreHome.dart';
import 'package:firebase_storage/firebase_storage.dart';
import 'package:image_picker/image_picker.dart';
import 'package:flutter/material.dart';
import 'CustomTextField.dart';
import 'LoadingDialog.dart';
import 'package:shared_preferences/shared_preferences.dart';
class Register extends StatefulWidget
const Register(Key? key) : super(key: key);
@override
_RegisterState createState() => _RegisterState();
class _RegisterState extends State<Register>
final TextEditingController _nametextEditingController=TextEditingController();
final TextEditingController _emailtextEditingController=TextEditingController();
final TextEditingController _passwordtextEditingController=TextEditingController();
final TextEditingController _cPasswordEditingController=TextEditingController();
final GlobalKey<FormState> _globalKey=GlobalKey<FormState>();
String userImageurl="";
late File _imagefile;
final _picker=ImagePicker();
static final String userID='uid';
static final String userName='name';
static final String userEmail='email';
static final String userAvatar='url';
static final String userPhotoUrl='photoUrl';
static final String userCartList='userCart';
SharedPreferences sharedPreferences=SharedPreferences.getInstance() as SharedPreferences;
@override
Widget build(BuildContext context)
double _screenwidth=MediaQuery.of(context).size.width;
return SingleChildScrollView(
child: Container(
child: Column(
mainAxisSize:MainAxisSize.max,
children: [
SizedBox(height: 10.0,),
InkWell(
onTap:(),
child: CircleAvatar(
radius: _screenwidth *0.15,
backgroundColor: Colors.white30,
// ignore: unnecessary_null_comparison
child: Icon(Icons.add_a_photo_outlined,size: _screenwidth *0.15,color: Colors.grey,),
//backgroundImage: _imagefile==null ? null: FileImage(_imagefile),
// ignore: unnecessary_null_comparison
// child: _imagefile==null ? Icon(Icons.add_a_photo_outlined,size: _screenwidth *0.15,color: Colors.grey,)
// :null,
),
),
SizedBox(height: 8.0,),
Form(
key: _globalKey,
child:Column(
children: [
CustomTextField(
controller: _nametextEditingController,
data: Icons.person,
hintText: 'Name',
isObsecure: false,
),
CustomTextField(
controller: _emailtextEditingController,
data: Icons.email,
hintText: 'Email',
isObsecure: false,
),
CustomTextField(
controller: _passwordtextEditingController,
data: Icons.password,
hintText: 'Password',
isObsecure: true,
),
CustomTextField(
controller: _cPasswordEditingController,
data: Icons.password,
hintText: 'Confirm Password',
isObsecure: true,
),
],
)
),
RaisedButton(
onPressed: ()
// uploadAndSaveImage();
,
color: Colors.blueGrey,
child: Text('Sign Up',style: TextStyle(color: Colors.white30),),
),
SizedBox(
height: 30.0,
),
Container(
height: 4.0,
width: _screenwidth* 0.8,
color: Colors.cyan,
),
SizedBox(
height: 15.0,
),
],
),
),
);
Future<void> _selectAndPickImage() async // ignore: unused_element
_imagefile = (await _picker.getImage(source: ImageSource.gallery) )as File;
Future<void> uploadAndSaveImage()async
// ignore: unnecessary_null_comparison
if(_imagefile==null)
showDialog(
context: context,
builder:(c)
return ErrorAlertDialog(message: 'Please Select an Image');
);
else
_passwordtextEditingController.text==_cPasswordEditingController.text
// ? is an 'if' condition
//if all these are true we will upload the image
? _emailtextEditingController.text.isNotEmpty
&& _passwordtextEditingController.text.isNotEmpty
&& _cPasswordEditingController.text.isNotEmpty
&&_nametextEditingController.text.isNotEmpty
? uploadToStorage()
//this dialogue is for the upper fields if they remains somehow empty
:displayDialog('Please fill the empty fields in form...')
:displayDialog('Password do not match');
displayDialog(String msg)
showDialog(context: context,
builder: (C)
return ErrorAlertDialog(message: msg);
);
uploadToStorage()async
showDialog(
context: context,
builder: (c)
return LoadingDialog(mesage: 'Authenticating, Please Wait!...',);
);
//unique name to upload it to firestore,and we will use datetime sp it won't repeat again
String imageFileName=DateTime.now().millisecondsSinceEpoch.toString();
StorageReference storageReference=FirebaseStorage.instance.ref().child(imageFileName) as StorageReference;
var uploadTask=storageReference.put(_imagefile);
UploadTaskSnapshot taskSnapshot=await uploadTask.future;
await taskSnapshot.ref.getDownloadURL().then((urlimage)
userImageurl=urlimage as String;
_registerUser();
);
route.FirebaseAuth _auth=route.FirebaseAuth.instance;
void _registerUser() async
route.User? userr;
await _auth.createUserWithEmailAndPassword(
email: _emailtextEditingController.text.trim(),
password: _passwordtextEditingController.text.trim(),
).then((auth)
userr = auth.user!;
).catchError((error)
Navigator.pop(context);
showDialog(
context: context,
builder: (c)
return ErrorAlertDialog(message: error.toString(),);
);
);
if (userr != null)
saveUserInfoToFirestore(userr!).then((value)
Navigator.pop(context);
//if the user registration gets successful we will send it to store home
Route route=MaterialPageRoute(builder: (c)=>StoreHome());
Navigator.pushReplacement(context, route);
);
Future saveUserInfoToFirestore(route.User firebaseUser) async
FirebaseFirestore.instance.collection('users').doc(firebaseUser.uid).set(
'uid':firebaseUser.uid,
'email':firebaseUser.email,
'name':_nametextEditingController.text.trim(),
'url':userImageurl,
);
await sharedPreferences.setString('uid', firebaseUser.uid);
await sharedPreferences.setString(userEmail, firebaseUser.email.toString());
await sharedPreferences.setString(userName, _nametextEditingController.text.trim());
await sharedPreferences.setString(userAvatar, userImageurl);
await sharedPreferences.setStringList(userCartList, ["garbageValue"]);
main.dart 文件：这里我使用 dart:async 作为方法“时间”
//import 'package:cloud_firestore/cloud_firestore.dart';
//import 'package:firebase/firestore.dart';
import 'dart:async';
import 'package:firebase_auth/firebase_auth.dart';
import 'package:firebase_core/firebase_core.dart';
import 'package:flutter/material.dart';
//import 'package:shared_preferences/shared_preferences.dart';
import 'AuthenticationScreen.dart';
import 'StoreHome.dart';
void main() async
WidgetsFlutterBinding.ensureInitialized();
await Firebase.initializeApp();
//SharedPreferences sharedPreferences=SharedPreferences.getInstance() as SharedPreferences;
//Firestore firestore=FirebaseFirestore.instance as Firestore;
// ignore: unnecessary_statements
runApp(MyApp());
class MyApp extends StatelessWidget
// This widget is the root of your application.
@override
Widget build(BuildContext context)
return MaterialApp(
title: 'E-Shop',
theme: ThemeData(
primarySwatch: Colors.blue,
),
debugShowCheckedModeBanner: false,
home: SplashScreen(),
);
class SplashScreen extends StatefulWidget
@override
State<StatefulWidget> createState() => _splashproperties();
//=>(Fat Arrow is used to replace the braces and return)
class _splashproperties extends State<SplashScreen>
@override
void initState()
super.initState();
displaySplash();
displaySplash()
FirebaseAuth auth=FirebaseAuth.instance;
Timer(Duration(seconds: 5), () async
if(auth.currentUser!= null)
Route route=MaterialPageRoute(builder: (_)=>StoreHome());
Navigator.pushReplacement(context, route);
else
Route route=MaterialPageRoute(builder: (_)=>AuthenticationScreen());
Navigator.pushReplacement(context, route);
);
Widget build(BuildContext context)
return Material
(
child: Container
(
decoration: new BoxDecoration(
gradient: new LinearGradient(colors:[Colors.pink,Colors.lightGreenAccent],
begin: const FractionalOffset(0.0, 0.0),
end: const FractionalOffset(1.0, 0.0),
stops: [0.0,1.0],
tileMode: TileMode.clamp,
)
),
child: Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: [
Image.asset('images/xweb.jpg'),
SizedBox(height: 20.0),
Text("Number One We Are!!!!!!!",style: TextStyle(color: Colors.white30),
),
],
),
),
),
);
【问题讨论】：
我也有同样的情况，这个答案帮助了我：Answer 【参考方案1】：尝试清理软件包并再次运行 pub get
flutter clean
./gradlew clean
flutter pub get
如果不起作用，请尝试this
【讨论】：
我重新安装了Android Studio，假设某些东西可能卡在工作室内存或缓存中的某个地方，然后我做了flutter clean，pub缓存修复，我删除了所有依赖项并再次发布了依赖项，我甚至尝试通过删除 pubspec.lock 文件，但错误没有移动一英寸。以上是关于未找到：“dart:html”导入“dart:html”；我不需要 dart:html 我也没有使用过，但我尝试通过导入它，但错误不会发生的主要内容，如果未能解决你的问题，请参考以下文章
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