MissingPluginException（在通道 plugins.flutter.io/firebase_auth 上没有找到方法 signInWithCredential 的实现）

Question

I got this problem at sign in function with firebase, I don't know how to solve it. Please help, thanks.

the code of my sign in function is like:

Future<void> signIn() async{
final formState = _formKey.currentState;
if(formState.validate()){
  //TODO login to firebase
  formState.save();
  try{
    FirebaseUser user = await FirebaseAuth.instance.signInWithEmailAndPassword(email: _email, password: _password);
    Navigator.push(context, MaterialPageRoute(builder: (context)=> Home(user: user)));
  }catch(e){
    print(e.details);
  }

}

}

and my flutter doctor is like:

[✓] Flutter (Channel master, v1.4.20-pre.2, on Mac OS X 10.14.4 18E226, locale
zh-Hans-CN)

[✓] Android toolchain - develop for Android devices (Android SDK version 28.0.3)
[✓] iOS toolchain - develop for iOS devices (Xcode 10.2)
[!] Android Studio (version 3.3)
✗ Flutter plugin not installed; this adds Flutter specific functionality.
✗ Dart plugin not installed; this adds Dart specific functionality.
[✓] IntelliJ IDEA Ultimate Edition (version 2018.1.8)
[✓] VS Code (version 1.33.1)
[✓] Connected device (1 available)

the output of the error is like:

 [VERBOSE-2:ui_dart_state.cc(148)] Unhandled Exception: 
    MissingPluginException(No implementation found for method  signInWithCredential on channel plugins.flutter.io/firebase_auth)
0      MethodChannel.invokeMethod (package:flutter/src/services/platform_channel.dart:300:7)
<asynchronous suspension>
1      FirebaseAuth.signInWithCredential (package:firebase_auth/src/firebase_auth.dart:278:54)
<asynchronous suspension>
2      FirebaseAuth.signInWithEmailAndPassword (package:firebase_auth/src/firebase_auth.dart:249:12)
3      _LoginPageState.signIn (package:pdc/Pages/Setup/signIn.dart:62:57)
<asynchronous suspension>
4      _InkResponseState._handleTap (package:flutter/src/material/ink_well.dart:511:14)
5      _InkResponseState.build.<anonymous closure> (package:flutter/src/material/ink_well.dart:566:30)
6      GestureRecognizer.invokeCallback (package:flutter/src/gestures/recognizer.dart:166:24)
7      TapGestureRecognizer._checkUp (package:flutter/src/gestures/tap.dart:240:9)
8      TapGestureR<…>

It happens both on my device and IOS simulator, and I didn't try it on android. I have already tried the flutter clean, start a new project, and upgrade the cocoaPods. But none of them is useful to my case. Thanks for help.

update question

It seems that whenever I try to do something with firebase, it will come up to this kind of question. I wrote code to sign up like this:

Future<void> signUp() async{
        if(_formKey.currentState.validate()){
      _formKey.currentState.save();
      FirebaseUser user = await FirebaseAuth.instance.createUserWithEmailAndPassword(email: _email, password: _password);
      Navigator.push(context, MaterialPageRoute(builder: (context)=> Home(user: user)));
    }

  }

The output of my code is

[VERBOSE-2:ui_dart_state.cc(148)] Unhandled Exception: MissingPluginException(No implementation found for method createUserWithEmailAndPassword on channel plugins.flutter.io/firebase_auth)
#0      MethodChannel.invokeMethod (package:flutter/src/services/platform_channel.dart:300:7)
<asynchronous suspension>
#1      FirebaseAuth.createUserWithEmailAndPassword (package:firebase_auth/src/firebase_auth.dart:108:54)
<asynchronous suspension>
#2      _LoginPageState.signUp (package:pdc/Pages/Setup/signIn.dart:78:55)
<asynchronous suspension>
#3      _InkResponseState._handleTap (package:flutter/src/material/ink_well.dart:511:14)
#4      _InkResponseState.build.<anonymous closure> (package:flutter/src/material/ink_well.dart:566:30)
#5      GestureRecognizer.invokeCallback (package:flutter/src/gestures/recognizer.dart:166:24)
#6      TapGestureRecognizer._checkUp (package:flutter/src/gestures/tap.dart:240:9)
#7      TapGestureRecognizer.handlePrimaryPointer (package:flutter/src/gestures/tap.dart:177:9)
#8      PrimaryPointerGestureRecognizer.handleEvent (package:flutter/src/gestures/recognizer.dart:436:9)

And I'm sure I finished the setup of firebase and successfully connected flutter app with firebase.

Answer 1

I had a really hard time in making Firebase work. I think it should be REALLY easy, as both Flutter and Firebase are Google products. Anyway, I had to use this code for the AppDelegate.m file in iOS:

#include "AppDelegate.h"
#include "GeneratedPluginRegistrant.h"

@import UIKit;
@import Firebase;

@implementation AppDelegate

- (BOOL)application:(UIApplication *)application
didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
  [FIRApp configure];
  [GeneratedPluginRegistrant registerWithRegistry:self];
  return [super application:application didFinishLaunchingWithOptions:launchOptions]; // YES;
}
@end

Have you tried something like this already?

Answer 2

我遇到了同样的问题并通过升级 firebase_auth 包来解决它。

Answer 3

I believe you need to run packages get & upgrade. If you are using Android studio you can just go in your pubspeck.yaml file and two buttons will appear in the top right corner or you can just use your terminal.

Using packages.