undefined is not a function(evaluating'react3.default.findNodeHandle(-this3.refs[argument.ref])')

[sravanibodapati]

when i am trying click on fileds like name,phone,email it is displaying that error.my code is given below

'use strict'; import React, { Component } from 'react'; import { ScrollView, Text, TouchableOpacity, TouchableHighlight, View, TextInput, ToastAndroid } from 'react-native';

import styles from './Styles';

export default class Register extends Component { constructor(props) { super(props);

this.state = {
  data: {
         name: undefined,
        phone: undefined,
     password: undefined,
    passwordd: undefined,
         role: 'patient'
  },
  loading: false,
  messages: []
};

}

render() { const{navigate} = this.props.navigation let fields = [ {ref: 'name', placeholder: 'Full Name', keyboardType: 'default', secureTextEntry: false, message: ' Full Name cannot be blank', style: [styles.inputText]}, {ref: 'phone', placeholder: 'Phone Number', keyboardType: 'numeric', secureTextEntry: false, message: ' Phone Number cannot be blank', style: [styles.inputText]}, {ref: 'Email', placeholder: 'Email', keyboardType: 'email-address', secureTextEntry: false, message: ' Email id cannot be blank', style: [styles.inputText]}, {ref: 'password', placeholder: 'Password', keyboardType: 'default', secureTextEntry: true, message: ' Password cannot be blank', style: [styles.inputText]}, {ref: 'passwordd', placeholder: 'Password Confirmation', keyboardType: 'default', secureTextEntry: true, message: '* Password Confirmation cannot be blank', style: [styles.inputText]}, ];

return(
  <ScrollView ref={'registerFormC'} {...this.props}>
    <TouchableOpacity activeOpacity={1} style={styles.titleContainer}>
      <Text style={styles.title}>REGISTER</Text>
    </TouchableOpacity>
    <View key={'messages'}>
      {this.renderMessages()}
    </View>
    <View key={'name'} style={styles.inputContainer}>
      <TextInput {...fields[0]} onFocus={() => this.onFocus({...fields[0]})} onChangeText={(text) => this.state.data.name = text} />
    </View>
    <View key={'phone'} style={styles.inputContainer}>
      <TextInput {...fields[1]} onFocus={() => this.onFocus({...fields[1]})} onChangeText={(text) => this.state.data.phone = text} />
    </View>
    <View key={'password'} style={styles.inputContainer}>
      <TextInput {...fields[2]} onFocus={() => this.onFocus({...fields[2]})} onChangeText={(text) => this.state.data.password = text} />
    </View>
    <View key={'passwordd'} style={styles.inputContainer}>
      <TextInput {...fields[3]} onFocus={() => this.onFocus({...fields[3]})} onChangeText={(text) => this.state.data.passwordd = text} />
    </View>
    <TouchableHighlight style={this.state.loading ? styles.buttonDisabled : styles.button} underlayColor={'#2bbbad'} onPress={() => this.onSubmit(fields)}>
      <Text style={styles.buttonText}>{this.state.loading ? 'Please Wait . . .' : 'Submit'}</Text>
    </TouchableHighlight>
    <View style={{flex:1,flexDirection:'row',alignItems:'flex-start',margin:8}}>
      <Text style={{fontSize:17}}>{'Have an account? '}</Text>
      <TouchableOpacity activeOpacity={0.7} onPress={() => navigate('Login')}>
        <Text style={{fontSize:17,color:'#512DA8'}}>{'Login'}</Text>
      </TouchableOpacity>
    </View>
  </ScrollView>
);

}

renderMessages() { if (this.state.messages.length > 0) { let messages = this.state.messages.map((val, key) => { if (val.message) return {val.message}; });

  return messages;
}

}

onFocus(argument) { setTimeout(() => { let scrollResponder = this.refs.registerFormC.getScrollResponder(); scrollResponder.scrollResponderScrollNativeHandleToKeyboard( React.findNodeHandle(this.refs[argument.ref]), 110, true ); }, 50); }

onSubmit(argument) { if (this.state.loading) { ToastAndroid.show('Please Wait . . .', ToastAndroid.SHORT); return null; }

let keys = Object.keys(this.state.data).map((val, key) => {
  if ([null, undefined, 'null', 'undefined', ''].indexOf(this.state.data[val]) > -1) return val;
});

this.setState({messages: []});

argument.map((val, key) => {
  if (keys.indexOf(val.ref) > -1) this.setState({messages: this.state.messages.concat(val)});
});

if (this.state.messages.length > 0) return null;

this.gotoRoute('waiting'); return; // for demo only

this.setState({loading: true});

api.auth.register(this.state.data)
  .then((response) => {
    if (!response.ok) throw Error(response.statusText || response._bodyText);
    return response.json();
  })
  .then((responseData) => {
    console.log(responseData);
    ToastAndroid.show(JSON.stringify(responseData), ToastAndroid.LONG);
  })
  .catch((error) => {
    console.log(error);
    ToastAndroid.show(String(error).replace('Error: ',''), ToastAndroid.LONG);
  })
  .done(() => {
    this.setState({loading: false});
  });

}

goBack() { if (this.props.navigator) { this.props.navigator.pop(); } }

gotoRoute(name) { if (this.props.navigator && this.props.navigator.getCurrentRoutes()[this.props.navigator.getCurrentRoutes().length-1].name != name) { this.props.navigator.push({name: name}); } }

replaceRoute(name) { if (this.props.navigator && this.props.navigator.getCurrentRoutes()[this.props.navigator.getCurrentRoutes().length-1].name != name) { this.props.navigator.replace({name: name}); } } }