github.com/instea/react-native-color-picker

react-native-color-picker

React Native implementation of color picker for both Android and iOS.

• works both in controlled and uncontrolled way
• old color can be displayed for visual comparison
• holo and triangle color pickers

Getting started

Install the color picker

npm install react-native-color-picker --save

And use it in your application

import { ColorPicker } from 'react-native-color-picker'

const Picker = () => (
  <ColorPicker
    onColorSelected={color => alert(`Color selected: ${color}`)}
    style={{flex: 1}}
  />
)

Color picker will use space you provide. Therefore it is necessary to provide styles that will determine picker's size.

API

Color picker type

We provide two types of color picker - holo (default) and triangle color picker. Both has the same API so that they are interchangable. Just import it and use it the same way:

import { ColorPicker, TriangleColorPicker } from 'react-native-color-picker'

ColorPicker	TriangleColorPicker

Props

Color pickers accepts properties below. Each property which define color is represented as a color string.

Property	Type	Note
color	`String	HSV`
defaultColor	String	Defines initial selected color in uncontrolled component.
oldColor	String	Old color to be used for visual comparision. If it is not defined, whole circle is representing selected color.
style	Style	Styles passed to color picker container
onColorSelected	Function	Callback with color (HEX string) as argument called when user confirms color selection.
onColorChange	Function	Callback called each time when color is changed. Used in controlled component. Argument is color in HSV representation (see below)
onOldColorSelected	Function	Callback with color (HEX string) as argument called when user selects old color.

When using color picker as a controlled component you should always use HSV color representation to avoid conversion from/to HEX or RGB. HSV color representation is an object literal with properties:

{
  h: number, // <0, 360>
  s: number, // <0, 1>
  v: number, // <0, 1>
}

Helper functions

To utilize HSV -> HEX/RGB conversion we provide helper functions:

import { toHsv, fromHsv } from 'react-native-color-picker'

toHsv('blue') // { h: 24, s: 1, v: 1 }

fromHsv({ h: 200, s: 0.4, v:0.4 }) // #3d5866

Examples

• Uncontrolled picker
• Controlled picker
• Uncontrolled triangle picker
• Controlled triangle picker

Limitations

• Does not work well within ScrollView due to touch event interference.

Thanks

Our implementation was inspired by Android Holo ColorPicker