React Native Resegmented Control

React Native Resegmented Control is a fully customizable, declarative component that mimics the design of UISegmentedControl from iOS 13. Supported on iOS and Android.

Motivation

We wanted to use the new segmented control in our app, but there are a few issues with the native component SegmentedControlIOS.

1. The new design is only available on iOS 13 and above - say bye to app support for older versions.
2. The component is not fully customizable.
3. There is no equivalent component for Android - boo.

Why not use one of the other existing libaries? While any of the other libraries would do the job, none of them comes with the new iOS 13 design out of the box. We really wanted the fancy slider animation. 😎

Installation

1. First install the library from npm using yarn or npm

yarn add react-native-resegmented-control

2. Install additional dependencies

yarn add react-native-gesture-handler react-native-reanimated

3a. (Pre 0.59 RN) Link the native modules

react-native link react-native-gesture-handler react-native-reanimated

3b. (Post 0.60 RN) Install the Pods

pod install

Example

import { SegmentedControl, Segment } from 'react-native-resegmented-control';

<SegmentedControl
  activeTintColor="black"
  inactiveTintColor="white"
  initialSelectedName="two"
  onChangeValue={(name: string) => setSelectedSegment(name)}
  style={[styles.segmentedControl]}
>
  <Segment name="one" content="One" />
  <Segment name="two" content="Two" />
</SegmentedControl>;

SegmentedControl

activeTintColor

Color of the active content.

Type	Required	Default
string	No	#000000

disabled

Disable the segmented control.

Type	Required	Default
boolean	No	false

disabledStyle

Style of the disabled segmented control. Uses the same styles as a View component.

Type	Required	Default
ViewStyle	No	{ opacity: 0.5 }

inactiveTintColor

Color of the inactive content.

Type	Required	Default
string	No	#000000

initialSelectedName

Name of the segment to initially select.

Type	Required
string	No

onChangeValue

Callback that is called when the user taps a segment. Passes the name of the Segment as an argument.

Type	Required
function	No

function onChangeValue(name: string): void {}

sliderStyle

Style of the slider. Uses the same styles as a View component.

Type	Required
ViewStyle	No

style

Style of the segmented control. Uses the same styles as a View component.

Type	Required
ViewStyle	No

Segment

content

Element for the segment.

Type	Required	Props
Element, Function	Yes	active, activeTintColor, disabled, inactiveTintColor

disabled

Disable the segment.

Type	Required	Default
boolean	No	false

disabledStyle

Style of the disabled segment. Uses the same styles as a View component.

Type	Required	Default
ViewStyle	No	{ opacity: 0.5 }

name

Unique name used to identify each segment.

Type	Required
string	Yes

style

Style of the segment. Uses the same styles as a View component.

Type	Required
ViewStyle	No

Unit Testing with Jest

This package relies on react-native-reanimated.

When rendering this component with renderers such as Jest you may see this error:

  ● Test suite failed to run

    Invariant Violation: Native module cannot be null.

      at invariant (node_modules/invariant/invariant.js:40:15)
      at new NativeEventEmitter (node_modules/react-native/Libraries/EventEmit
ter/NativeEventEmitter.js:36:27)
      at Object.<anonymous> (node_modules/react-native-reanimated/src/Reanimat
edEventEmitter.js:4:1)
      at Object.<anonymous> (node_modules/react-native-reanimated/src/core/Ani
matedCall.js:1:909)

To get around this you can use the react-native-reanimated mock. Here is how to in Jest:

In your test file add this:

jest.mock('react-native-reanimated', () =>
  require('react-native-reanimated/mock')
);

To Dos

• More customizable options
• Pixel perfect to native design