本文介绍了如何在带有Firebase的Flutter中使用电话号码进行身份验证？的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述 29岁程序员，3月因学历无情被辞！ 我不熟悉，并且使用firebase验证电话号码，但是我无法进行验证。 我浏览了它，但是找不到任何令人满意的解决方案。 我从StackOverflow实现了一些代码，但是发生了异常'Unhandled Exception：type' （FirebaseUser）=> Null'不是类型强制转换类型'（AuthCredential）=> void'的子类型，并且无法捕获异常。 signIn（）async { AuthCredential credential = PhoneAuthProvider.getCredential（ VerificationId：VerificationId， smsCode：smsCode ） ; 等待firebaseAuth.signInWithCredential（凭据）.then（（用户）{ Navigator.of（context）.pushReplacementNamed（'/ homepage'）; print（'已成功登录电话号码：user-> $ user'）; }）。catchError（（e）{ print（e）; }）; } 它将向您发送给指定电话的OTP Future< void>。 verifyPhone（）async { final PhoneCodeAutoRetrievalTimeout autoRetrieval =（String verId）{ this.verificationId = verId; }; final PhoneCodeSent smsCodeSent =（String verId，[int forceCodeResend]）{ this.verificationId = verId; smsCodeDialog（context）.then（（value）{ print（ Signed in）; }）; }; 最终的PhoneVerificationCompleted VerificationCompleted =（FirebaseUser用户）{ print（‘verified’）; }作为PhoneVerificationCompleted； 最终的PhoneVerificationFailed verfifailed =（AuthException异常）{ print（ $ {exception.message}）; }; 等待firebaseAuth.verifyPhoneNumber（电话号码：this.phoneNo， codeAutoRetrievalTimeout：autoRetrieval， codeSent：smsCodeSent， timeout：const Duration（seconds： 10），验证完成：VerificationCompleted，验证失败：验证失败）; } pubspec.yaml 名称：babilok 说明：一个新的Flutter项目。 版本：1.0.0 + 1 环境： sdk：> = 2.1.0< 3.0.0 依赖项：抖动： sdk：抖动 cupertino_icons：^ 0.1.2 page_transition： firebase_auth： dev_dependencies： flutter_test： sdk：flutter use-material-design：true ＃添加资产到您的应用程序中，添加一个资产部分，例如：资产：-asset / login_wheel.png -资产/login_wheel1.png -资产/forward_arrow.png -资产/google_ads.png -资产/wheel.png -资产/red_cross.png -资产/welcome_logo.png -资产/money_bag.png -资产/user.png -资产/money_bag.png -资产/up_gift_wheel.png -资产/cross.png -资产/图标/ facebook_logo1。 png -资产/图标/twitter_logo1.png -资产/图标/instagram_logo1.png 解决方案我从stackOverflow 此处， 最终PhoneVerificationCompleted VerificationCompleted =（AuthCredential凭据）{ print（'verified'）; }; I'm new to flutter,and using firebase to authenticate with phone number but I m unable to authenticate.I browsed for it but couldn't get any satisfying solution.I implemented some code from the StackOverflow but there is occurring Exception 'Unhandled Exception: type '(FirebaseUser) => Null' is not a subtype of type '(AuthCredential) => void' in type cast' and couldn't catch the Exception.signIn()async{ AuthCredential credential= PhoneAuthProvider.getCredential( verificationId: verificationId, smsCode: smsCode ); await firebaseAuth.signInWithCredential(credential).then((user){ Navigator.of(context).pushReplacementNamed('/homepage'); print('signed in with phone number successful: user -> $user'); }).catchError((e){ print(e); }); }It will send you OTP to given phone number.Future<void> verifyPhone()async{ final PhoneCodeAutoRetrievalTimeout autoRetrieval=(String verId){ this.verificationId=verId; }; final PhoneCodeSent smsCodeSent=(String verId, [int forceCodeResend]){ this.verificationId=verId; smsCodeDialog(context).then((value){ print("Signed in"); }); }; final PhoneVerificationCompleted verificationCompleted = (FirebaseUser user) { print('verified'); } as PhoneVerificationCompleted; final PhoneVerificationFailed verfifailed=(AuthException exception){ print("${exception.message}"); }; await firebaseAuth.verifyPhoneNumber( phoneNumber: this.phoneNo, codeAutoRetrievalTimeout: autoRetrieval, codeSent: smsCodeSent, timeout: const Duration(seconds: 10), verificationCompleted: verificationCompleted, verificationFailed: verfifailed ); }pubspec.yamlname: babilokdescription: A new Flutter project.version: 1.0.0+1environment: sdk: ">=2.1.0 <3.0.0"dependencies: flutter: sdk: flutter cupertino_icons: ^0.1.2 page_transition: firebase_auth:dev_dependencies: flutter_test: sdk: flutter uses-material-design: true # To add assets to your application, add an assets section, like this: assets: - assets/login_wheel.png - assets/login_wheel1.png - assets/forward_arrow.png - assets/google_ads.png - assets/wheel.png - assets/red_cross.png - assets/welcome_logo.png - assets/money_bag.png - assets/user.png - assets/money_bag.png - assets/up_gift_wheel.png - assets/cross.png - assets/icons/facebook_logo1.png - assets/icons/twitter_logo1.png - assets/icons/instagram_logo1.png 解决方案 i have found the solution from stackOverflow here,final PhoneVerificationCompleted verificationCompleted = (AuthCredential credential) { print('verified'); }; 这篇关于如何在带有Firebase的Flutter中使用电话号码进行身份验证？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！ 上岸，阿里云！
