React Native Segmented Picker

A pure JavaScript implementation of the iOS style wheel spinner dropdown picker that is typically used for date and time selection.

• Supports one or many columns (list segments).
• Show any data in the picklists, not just dates and times.
• Customisable colors and sizing.
• Does not rely on native dependencies (react-native link not required).
• Works with apps built on Expo.

Installation

$ yarn add react-native-segmented-picker
# or
# $ npm install --save react-native-segmented-picker

Usage

import React, { Component } from 'react';
import SegmentedPicker from 'react-native-segmented-picker';

class Example extends Component {
  constructor(props) {
    super(props);
    this.segmentedPicker = React.createRef();
  }

  componentDidMount() {
    // Can alternatively be shown with the `visible` prop for redux etc.
    this.segmentedPicker.show();
  }

  onConfirm = (selections) => {
    console.info(selections);
    // => { column1: { label: 'Option 1' }, column2: { label: 'Option 3' } }
  }

  render() {
    return (
      <SegmentedPicker
        ref={this.segmentedPicker}
        onConfirm={this.onConfirm}
        options={{
          column1: [
            { label: 'Option 1' },
            { label: 'Option 2' },
          ],
          column2: [
            { label: 'Option 3', key: 'option_3' },
          ],
        }}
      />
    );
  }
}

Further examples can be found in ./examples/src.

Props, Events & Methods Reference

Props

Event Props

Methods

Remember that you will need to set a ref for the <SegmentedPicker /> component in order to use the methods outlined below.

ref.show();

Display the Segmented Picker modal over all other content on the screen. This is the preferred method of showing a <SegmentedPicker /> so that you don't have to manually hide the component after listening to the onCancel and onConfirm events.

Note that this method will have no effect if the visible prop is set.

ref.hide();

Hide the Segmented Picker modal from the screen. Generally should not be required, as this method is automatically called by this library after events where visibility should be toggled off.

ref.selectLabel(label, columnId, animated=true, emitEvent=true, zeroFallback=false);

Programmatically select a label from a list column while the component is displaying.

• {string} label: Eg 'Option 1'
• {string} columnId: Eg 'column1'
• {boolean=true} animated: Scroll or snap to the item?
• {boolean=true} emitEvent: Specify whether to emit the onValueChange event.
• {boolean=false} zeroFallback Select the first list item if not found.

ref.selectIndex(index, columnId, animated=true, emitEvent=true);

Programmatically select an array index from a list column while the component is displaying. This method will give you better performance than the above if you already know the index of the item that you want to select.

• {number} index: Eg 0
• {string} columnId: Eg 'column1'
• {boolean=true} animated: Scroll or snap to the item?
• {boolean=true} emitEvent: Specify whether to emit the onValueChange event.

ref.getCurrentSelections();

Returns the current selected items as they appear in the UI. This is the same method that's used internally when the onCancel and onConfirm events are fired.

Contributions

This is an open source project. Bug fixes, improvements and the addition of useful new features to this package are greatly appreciated.

1. Fork and clone the repository from GitHub.
2. Setup: yarn install.
3. Checkout a new branch, eg: feature/my-thing or bugfix/terrible-thing.
4. After making any changes, make sure that yarn run test still passes.
5. Ask yourself if there's a new unit test that you could write to capture your changes?
6. Submit a pull request to master outlining what your change is and how you tested it.

Made with love in Melbourne Adam McArthur.