问题
I'm trying to implement phone auth with firebase in react-native app. I just see that if user already signed up with phone number (exist in Authenticated table in firebase console) and he sign out and want to sign up again with the same phone, I don't get sms code again. I get verificationId null and it throws the errow
TypeError: Cannot read property 'length' of null
in this line of code
{started && auto && !codeInput && !codeInput.length
? this.renderAutoVerifyProgress()
: null}
my full code
import React, { Component } from 'react';
import {
View,
Button,
Text,
TextInput,
Image,
ActivityIndicator,
Platform,
} from 'react-native';
import firebase from 'react-native-firebase';
const imageUrl =
'https://www.shareicon.net/data/512x512/2016/07/19/798524_sms_512x512.png';
export default class PhoneAuth extends Component {
static getDefaultState() {
return {
error: '',
codeInput: '',
phoneNumber: '+972',
auto: Platform.OS === 'android',
autoVerifyCountDown: 0,
sent: false,
started: false,
user: null,
};
}
constructor(props) {
super(props);
this.timeout = 20;
this._autoVerifyInterval = null;
this.state = PhoneAuth.getDefaultState();
}
_tick() {
this.setState({
autoVerifyCountDown: this.state.autoVerifyCountDown - 1,
});
}
/**
* Called when confirm code is pressed - we should have the code and verificationId now in state.
*/
afterVerify = () => {
const { codeInput, verificationId } = this.state;
const credential = firebase.auth.PhoneAuthProvider.credential(
verificationId,
codeInput
);
// TODO do something with credential for example:
firebase
.auth()
.signInWithCredential(credential)
.then(user => {
console.log('PHONE AUTH USER ->>>>>', user.toJSON());
this.setState({ user: user.toJSON() });
})
.catch(console.error);
};
signIn = () => {
const { phoneNumber } = this.state;
this.setState(
{
error: '',
started: true,
autoVerifyCountDown: this.timeout,
},
() => {
firebase
.auth()
.verifyPhoneNumber(phoneNumber)
.on('state_changed', phoneAuthSnapshot => {
console.log(phoneAuthSnapshot);
switch (phoneAuthSnapshot.state) {
case firebase.auth.PhoneAuthState.CODE_SENT: // or 'sent'
// update state with code sent and if android start a interval timer
// for auto verify - to provide visual feedback
this.setState(
{
sent: true,
verificationId: phoneAuthSnapshot.verificationId,
autoVerifyCountDown: this.timeout,
},
() => {
if (this.state.auto) {
this._autoVerifyInterval = setInterval(
this._tick.bind(this),
1000
);
}
}
);
break;
case firebase.auth.PhoneAuthState.ERROR: // or 'error'
// restart the phone flow again on error
clearInterval(this._autoVerifyInterval);
this.setState({
...PhoneAuth.getDefaultState(),
error: phoneAuthSnapshot.error.message,
});
break;
// ---------------------
// ANDROID ONLY EVENTS
// ---------------------
case firebase.auth.PhoneAuthState.AUTO_VERIFY_TIMEOUT: // or 'timeout'
clearInterval(this._autoVerifyInterval);
this.setState({
sent: true,
auto: false,
verificationId: phoneAuthSnapshot.verificationId,
});
break;
case firebase.auth.PhoneAuthState.AUTO_VERIFIED: // or 'verified'
clearInterval(this._autoVerifyInterval);
this.setState({
sent: true,
codeInput: phoneAuthSnapshot.code,
verificationId: phoneAuthSnapshot.verificationId,
});
break;
default:
// will never get here - just for linting
}
});
}
);
};
renderInputPhoneNumber() {
const { phoneNumber } = this.state;
return (
<View style={{ flex: 1 }}>
<Text>Enter phone number:</Text>
<TextInput
autoFocus
style={{ height: 40, marginTop: 15, marginBottom: 15 }}
onChangeText={value => this.setState({ phoneNumber: value })}
placeholder="Phone number ... "
value={phoneNumber}
/>
<Button
title="Begin Verification"
color="green"
onPress={this.signIn}
/>
</View>
);
}
renderSendingCode() {
const { phoneNumber } = this.state;
return (
<View style={{ paddingBottom: 15 }}>
<Text style={{ paddingBottom: 25 }}>
{`Sending verification code to '${phoneNumber}'.`}
</Text>
<ActivityIndicator animating style={{ padding: 50 }} size="large" />
</View>
);
}
renderAutoVerifyProgress() {
const {
autoVerifyCountDown,
started,
error,
sent,
phoneNumber,
} = this.state;
if (!sent && started && !error.length) {
return this.renderSendingCode();
}
return (
<View style={{ padding: 0 }}>
<Text style={{ paddingBottom: 25 }}>
{`Verification code has been successfully sent to '${phoneNumber}'.`}
</Text>
<Text style={{ marginBottom: 25 }}>
{`We'll now attempt to automatically verify the code for you. This will timeout in ${autoVerifyCountDown} seconds.`}
</Text>
<Button
style={{ paddingTop: 25 }}
title="I have a code already"
color="green"
onPress={() => this.setState({ auto: false })}
/>
</View>
);
}
renderError() {
const { error } = this.state;
return (
<View
style={{
padding: 10,
borderRadius: 5,
margin: 10,
backgroundColor: 'rgb(255,0,0)',
}}
>
<Text style={{ color: '#fff' }}>{error}</Text>
</View>
);
}
render() {
const { started, error, codeInput, sent, auto, user } = this.state;
return (
<View
style={{ flex: 1, backgroundColor: user ? 'rgb(0, 200, 0)' : '#fff' }}
>
<View
style={{
padding: 5,
justifyContent: 'center',
alignItems: 'center',
flex: 1,
}}
>
<Image
source={{ uri: imageUrl }}
style={{
width: 128,
height: 128,
marginTop: 25,
marginBottom: 15,
}}
/>
<Text style={{ fontSize: 25, marginBottom: 20 }}>
Phone Auth Example
</Text>
{error && error.length ? this.renderError() : null}
{!started && !sent ? this.renderInputPhoneNumber() : null}
{started && auto && !codeInput && !codeInput.length
? this.renderAutoVerifyProgress()
: null}
{!user && started && sent && (codeInput && codeInput.length || !auto) ? (
<View style={{ marginTop: 15 }}>
<Text>Enter verification code below:</Text>
<TextInput
autoFocus
style={{ height: 40, marginTop: 15, marginBottom: 15 }}
onChangeText={value => this.setState({ codeInput: value })}
placeholder="Code ... "
value={codeInput}
/>
<Button
title="Confirm Code"
color="#841584"
onPress={this.afterVerify}
/>
</View>
) : null}
{user ? (
<View style={{ marginTop: 15 }}>
<Text>{`Signed in with new user id: '${user.uid}'`}</Text>
</View>
) : null}
</View>
</View>
);
}
}
来源：https://stackoverflow.com/questions/50120751/firebase-auth-phone-not-send-sms-to-user-that-already-aunthenticated