expo/src/LinearGradient.ios.js

The Expo SDK

'use strict';

import React, { Component, PropTypes } from 'react';

import {
  View,
  ViewPropTypes,
  processColor,
  requireNativeComponent,
} from 'react-native';

export default class LinearGradient extends Component {
  static propTypes = {
    start: PropTypes.arrayOf(PropTypes.number),
    end: PropTypes.arrayOf(PropTypes.number),
    colors: PropTypes.arrayOf(PropTypes.string).isRequired,
    locations: PropTypes.arrayOf(PropTypes.number),
    ...ViewPropTypes,
  };

  render() {
    const { colors, locations, ...otherProps } = this.props;
    if (colors && locations && colors.length !== locations.length) {
      console.warn(
        'LinearGradient colors and locations props should be arrays of the same length'
      );
    }

    return (
      <NativeLinearGradient
        {...otherProps}
        colors={colors.map(processColor)}
        locations={locations ? locations.slice(0, colors.length) : null}
      />
    );
  }
}

const NativeLinearGradient = requireNativeComponent(
  'ExponentLinearGradient',
  null
);