React Native Custom Picker

This is an advanced version of react-native-customer-picker component. https://www.npmjs.com/package/react-native-custom-picker

Installation

Using npm:

npm i -S rn-custom-picker

or yarn:

yarn add rn-custom-picker

Props

| Prop Name | Data Type | Default Values | Description | |---------------------|-----------|-----------------|---------------------------------------------------| | options | any[] | undefined | Option list. | | value | any | undefined | Current selected item. | | defaultValue | any | undefined | Default value. When clear button pressed this value become selected item.| | placeholder | string | 'Pick an item' | Placeholder, as default text to display when no option is selected. | | modalAnimationType | 'none', 'slide' or 'fade' | 'none' | Modal animation type. | | headerTemplate | HeaderTemplateFunction | undefined | Assign function to render header. | | footerTemplate | FooterTemplateFunction | undefined | Assign function to render footer. | | fieldTemplate | FieldTemplateFunction | Basic/default field view | Assign function to render field view. | | fieldTemplateProps | FieldTemplateProps | undefined | Props for field template | | optionTemplate | OptionTemplateFunction | Basic/default option view | Assign function to render option. | | optionTemplateProps | OptionTemplateProps | undefined | Props for option template | | getLabel | (selectedItem: any) => string | Returns selectedItem.toString() | Assign function to return the selected option text to be displayed in field. | | style | ViewStyle | default | Style of field container. | | backdropStyle | ViewStyle | default | Style of modal backdrop. | | modalStyle | ViewStyle | default | Dropdown modal style. | | maxHeight | ViewStyle | default | Maximum height of modal. | | onValueChange | ViewStyle | undefined | Event fired when value has been changed. | | onFocus | ViewStyle | undefined | Event fired when modal is opened. | | onBlur | ViewStyle | undefined | Event fired when modal is closed. |

FieldTemplateProps

| Prop Name | Data Type | Default Values | Description | |---------------------|-----------|-----------------|---------------------------------------------------| | textStyle | TextStyle | undefined | Style of field text. | | containerStyle | ViewStyle | undefined | Style of field container. | | clearImage | JSX.Element | cross icon | Image element for clear button. |

OptionTemplateProps

| Prop Name | Data Type | Default Values | Description | |---------------------|-----------|-----------------|---------------------------------------------------| | textStyle | TextStyle | undefined | Style of option text. | | containerStyle | ViewStyle | undefined | Style of option container. |

Example

Basic Example (No Custom)

You can use CustomPicker component directly as shown below:

import * as React from 'react'
import { Alert, View } from 'react-native'
import { CustomPicker } from 'react-native-custom-picker'

export class BasicExample extends React.Component {
  render() {
    const options = ['One', 'Two', 'Three', 'Four', 'Five']
    return (
      <View style={{ flex: 1, flexDirection: 'column', justifyContent: 'center' }}>
        <CustomPicker
          options={options}
          onValueChange={value => {
            Alert.alert('Selected Item', value || 'No item were selected!')
          }}
        />
      </View>
    )
  }
}

Advanced Example (Customized)

Or customize it your self like this:

import * as React from 'react'
import { Alert, Text, View, TouchableOpacity, StyleSheet } from 'react-native'
import { CustomPicker } from 'react-native-custom-picker'

export class CustomExample extends React.Component {
  render() {
    const options = [
      {
        color: '#2660A4',
        label: 'One',
        value: 1
      },
      {
        color: '#FF6B35',
        label: 'Two',
        value: 2
      },
      {
        color: '#FFBC42',
        label: 'Three',
        value: 3
      },
      {
        color: '#AD343E',
        label: 'Four',
        value: 4
      },
      {
        color: '#051C2B',
        label: 'Five',
        value: 5
      }
    ]
    return (
      <View style={{ flex: 1, flexDirection: 'column', justifyContent: 'center' }}>
        <CustomPicker
          placeholder={'Please select your favorite item...'}
          options={options}
          getLabel={item => item.label}
          fieldTemplate={this.renderField}
          optionTemplate={this.renderOption}
          headerTemplate={this.renderHeader}
          footerTemplate={this.renderFooter}
          onValueChange={value => {
            Alert.alert('Selected Item', value ? JSON.stringify(value) : 'No item were selected!')
          }}
        />
      </View>
    )
  }
  
  renderHeader() {
    return (
      <View style={styles.headerFooterContainer}>
        <Text>This is header</Text>
      </View>
    )
  }

  renderFooter(action) {
    return (
      <TouchableOpacity
        style={styles.headerFooterContainer}
        onPress={() => {
          Alert.alert('Footer', "You've click the footer!", [
            {
              text: 'OK'
            },
            {
              text: 'Close Dropdown',
              onPress: action.close.bind(this)
            }
          ])
        }}
      >
        <Text>This is footer, click me!</Text>
      </TouchableOpacity>
    )
  }

  renderField(settings) {
    const { selectedItem, defaultText, getLabel, clear } = settings
    return (
      <View style={styles.container}>
        <View>
          {!selectedItem && <Text style={[styles.text, { color: 'grey' }]}>{defaultText}</Text>}
          {selectedItem && (
            <View style={styles.innerContainer}>
              <TouchableOpacity style={styles.clearButton} onPress={clear}>
                <Text style={{ color: '#fff' }}>Clear</Text>
              </TouchableOpacity>
              <Text style={[styles.text, { color: selectedItem.color }]}>
                {getLabel(selectedItem)}
              </Text>
            </View>
          )}
        </View>
      </View>
    )
  }

  renderOption(settings) {
    const { item, getLabel } = settings
    return (
      <View style={styles.optionContainer}>
        <View style={styles.innerContainer}>
          <View style={[styles.box, { backgroundColor: item.color }]} />
          <Text style={{ color: item.color, alignSelf: 'flex-start' }}>{getLabel(item)}</Text>
        </View>
      </View>
    )
  }
}

const styles = StyleSheet.create({
  container: {
    borderColor: 'grey',
    borderWidth: 1,
    padding: 15
  },
  innerContainer: {
    flexDirection: 'row',
    alignItems: 'stretch'
  },
  text: {
    fontSize: 18
  },
  headerFooterContainer: {
    padding: 10,
    alignItems: 'center'
  },
  clearButton: { backgroundColor: 'grey', borderRadius: 5, marginRight: 10, padding: 5 },
  optionContainer: {
    padding: 10,
    borderBottomColor: 'grey',
    borderBottomWidth: 1
  },
  optionInnerContainer: {
    flex: 1,
    flexDirection: 'row'
  },
  box: {
    width: 20,
    height: 20,
    marginRight: 10
  }
})

License

MIT