firebase – TypeError：无法读取null的属性’uid’

我正在尝试使用firebase在我的应用程序中使用电话号码登录,但我遇到了登录过程的问题.我无法使用firebase中的电话号码登录,但如果我使用电话号码注册并重定向到主页,则它正常工作.我使用相同的方法登录,但我遇到类似TypeError的问题：无法读取null的属性’uid’,但我成功获取了所有控制台值.我不知道这里有什么问题.但是这个错误反复出现3次,

这是我的代码：

renderLoginButton() {
        if (this.props.loading) {
          return (
            <Spinner size="large" />
          );
        }

        return (
          <Button
          style={{ alignSelf: 'flex-start' }}
            onPress={this.onLoginBtnClicked.bind(this)}
          >
            Login
          </Button>
        );
      }

onLoginBtnClicked(){

const { contact,password } = this.props;
    const error =  Validator('password',password) ||  Validator('contact',contact);

    if (error !== null) {
      Alert.alert(error);
    } else {
          console.log('else');
        // this.props.loginUser({ contact,password});

        const mobileNo = '+91'+contact;
        firebase.auth().signInWithPhoneNumber(mobileNo)
        .then(confirmResult =>
            console.log(confirmResult),curr = firebase.auth(),console.log("curr"+JSON.stringify(curr)),this.setState({ data: curr}),NavigationService.navigate('Home')
        )
        .catch(error => console(error.message) );
    }

}

CustomDrawerComponent.js

import React,{ Component } from 'react';
import { View,Image,Text } from 'react-native';
import { DrawerItems } from 'react-navigation';
import { connect } from 'react-redux';

import { fetchUserDetails } from '../actions';

class CustomDrawerContentComponent extends Component {

  state = {
    uri: '',isfailed: ''
  }

  componentWillMount() {
    this.props.fetchUserDetails();
  }

  componentWillReceiveProps(nextProps) {
    let uri = '';
    if (nextProps.ProfilePic !== '') {
      uri = nextProps.ProfilePic;
      this.setState({ uri,isfailed: false });
    } else {
      uri = '../images/ic_person_24px.png';
      this.setState({ uri,isfailed: true });
    }

    this.setState({ uri });
  }

  renderProfileImage() {
    if (!this.state.isfailed) {
      return (
        <Image
          style={styles.profileImageStyle}
          source={{ uri: (this.state.uri) }}
        />
      );
    }
    return (
      <Image
        style={styles.profileImageStyle}
        source={require('../images/ic_person_24px.png')}
      />
    );
  }

  render() {
    console.log('Profile Pic :: ',this.props.ProfilePic);
    return (
      <View style={styles.container}>
        {this.renderProfileImage()}
        <Text style={styles.textStyle}>
          {this.props.name} - {this.props.category}
        </Text>
        <DrawerItems {...this.props} />
      </View>
    );
  }
}

const styles = {
  container: {
    flex: 1,paddingLeft: 10
  },textStyle: {
    fontSize: 14,textAlign: 'left',color: '#000000'
  },profileImageStyle: {
    alignSelf: 'flex-start',marginTop: 16,padding: 10,width: 40,height: 40,borderRadius: 75
  }
};

const mapStateToProps = state => {
  const { userprofile } = state;
  return userprofile;
};

export default connect(mapStateToProps,{ fetchUserDetails })(CustomDrawerContentComponent);

调用堆栈：

constructor(){
  this.userId = firebase.auth().currentUser.uid
}

/**
   * When the App component mounts,we listen for any authentication
   * state changes in Firebase.
   * Once subscribed,the 'user' parameter will either be null 
   * (logged out) or an Object (logged in)
   */
  componentDidMount() {
    this.authSubscription = firebase.auth().onAuthStateChanged((user) => {
      this.setState({
        loading: false,user,});
    });
  }
  /**
   * Don't forget to stop listening for authentication state changes
   * when the component unmounts.
   */
  componentWillUnmount() {
    this.authSubscription();
  }
  render() {
    // The application is initialising
    if (this.state.loading) return null;
    // The user is an Object,so they're logged in
    if (this.state.user) return <LoggedIn />;
    // The user is null,so they're logged out
    return <LoggedOut />;
  }
}