我试图在react-native应用中使用firebase实现手机验证。 我只是看到如果用户已经注册了电话号码（存在于firebase控制台中的Authenticated表中）并且他退出并想要使用同一部电话重新注册，我再也不会获得短信代码。我得到verifyId null并抛出了错误
TypeError：无法读取属性＆＃39;长度＆＃39;为null
在这行代码中
{started && auto && !codeInput && !codeInput.length
? this.renderAutoVerifyProgress()
: null}
我的完整代码
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>
);
}
}