Form Validation issue

[tbiinfotech]

Form validation not working: You attempted to set the key backgroundColor with the value "transparent" on an object that is meant to be immutable and has been frozen.

[ajiehatajie]

same issue

[Q8hma]

Hello
you can fix it by replace this code on Picker Field file

import PropTypes from 'prop-types';
import React, { Component } from 'react';
import { View, Text } from 'native-base';
import { Platform, Picker, TouchableOpacity } from 'react-native';
import Panel from '../../components/panel';
import styles from './../../styles';

const Item = Picker.Item;
export default class PickerField extends Component {
  static propTypes = {
    attributes: PropTypes.object,
    theme: PropTypes.object,
    updateValue: PropTypes.func,
    ErrorComponent: PropTypes.func,
  }
  handleChange(value) {
    const attributes = this.props.attributes;
    this.props.updateValue(attributes.name, attributes.options[value]);
  }
  render() {
    const { theme, attributes, ErrorComponent } = this.props;
    const isValueValid = attributes.options.indexOf(attributes.value) > -1;
    const pickerValue = attributes.options.indexOf(attributes.value).toString();
    if (Platform.OS !== 'ios') {
      return (
        <View
          style={{...styles.pickerMainAndroid, ...{
            backgroundColor: theme.pickerBgColor,
            borderBottomColor: theme.inputBorderColor,
            borderBottomWidth: theme.borderWidth,
          }}}
        >
          <View style={{ flex: 7 }}>
            <Text style={{ color: theme.inputColorPlaceholder }}>{attributes.label}</Text>
          </View>
          <View style={{ flex: 3 }}>
            <Picker
              style={{ padding: 2 }}
              textStyle={{ color: theme.pickerColorSelected }}
              iosHeader="Select one"
              mode={attributes.mode}
              selectedValue={pickerValue}
              onValueChange={value => this.handleChange(value)}
            >{
                attributes.options.map((item, index) => (
                  <Item key={index} label={item} value={`${index}`} />
                ))
              }
            </Picker>
          </View>
          <ErrorComponent {...{ attributes, theme }} />
        </View>
      );
    }
    return (
      <View
        style={{...styles.pickerMainAndroid, ...{
            backgroundColor: theme.pickerBgColor,
            borderBottomColor: theme.inputBorderColor,
            borderBottomWidth: theme.borderWidth,
          }}}
      >
        <TouchableOpacity
          onPress={() => this.panel.toggle()}
          style={{
            flex: 1,
            flexDirection: 'row',
            justifyContent: 'space-between',
            alignItems: 'center',
            paddingVertical: 10,
          }}
        >
          <Text style={{ color: theme.inputColorPlaceholder }}>
            {attributes.label}
          </Text>
          <Text style={{ color: theme.inputColorPlaceholder }}>
            {isValueValid ? attributes.value : 'None'}
          </Text>
        </TouchableOpacity>
        <ErrorComponent {...{ attributes, theme }} />
        <View style={{ flex: 1 }}>
          <Panel
            ref={(c) => { this.panel = c; }}
          >
            <Picker
              style={{ padding: 2 }}
              textStyle={{ color: theme.pickerColorSelected }}
              mode={attributes.mode}
              selectedValue={pickerValue}
              onValueChange={value => this.handleChange(value)}
            >{
                attributes.options.map((item, index) => (
                  <Item key={index} label={item} value={`${index}`} />
                  ))
              }
            </Picker>
          </Panel>
        </View>
      </View>

    );
  }
}

[angelalalachang]

I got the same issue, and exactly as @Q8hma suggested above, making those changes in /src/fields/picker/index.js would fix this bug.

The changes you need to make is perhaps summarized more clearly in this issue thread (#22) by @mbs8: Picker iOS Error http://github.com/bietkul/react-native-form-builder/issues/22

Duplicate of #22