React Native | ScrollTo

index.js

import React, { Component, Fragment } from 'react';
import { StyleSheet, Text, View, ScrollView, TouchableOpacity, Dimensions } from 'react-native';

const Menu = (props) => {
  let itens = ['blue', 'yellow', 'green', 'orange', 'pink'];
  const { menu } = styles;
  return (
    <View style={menu}>
      {
        itens.map(item =>
          <TouchableOpacity key={item.toLowerCase()} onPress={() => props.scrollToContent(item)}>
            <Text style={{ color: '#fff', fontWeight: '900' }}>{item.toUpperCase()}</Text>
          </TouchableOpacity>
        )
      }
    </View>
  )
}

export default class App extends Component {

  scrollToContentFn(item) {
    setTimeout(() => {
      this.refs[item].measure((x, y, width, height) => {
        this.scrollViewRef.scrollTo({ y, animated: true })
      })
    })
  }

  render() {
    const { container } = styles;
    return (
      <Fragment>
        <Menu scrollToContent={(item) => this.scrollToContentFn(item)} />
        <View style={container}>
          <ScrollView ref={ref => this.scrollViewRef = ref}>
            {
              (() => {
                let i, max, elements = [], colors = ['blue', 'yellow', 'green', 'orange', 'pink'];
                for (i = 0, max = 4; i <= max; i++) {
                  elements.push(
                    <View ref={colors[i]} key={i} style={{ backgroundColor: colors[i], padding: 20 }}>
                      <Text>Lorem, ipsum dolor sit amet consectetur adipisicing elit. Voluptate, veniam recusandae! Odit aut fugit harum facilis excepturi. Perferendis, incidunt vero quos voluptas cupiditate minima tenetur, modi in praesentium ea obcaecati dolorem corrupti illo, soluta ullam amet rerum suscipit non labore provident odio? Vero quasi hic voluptate atque corporis accusamus iste, nobis consequuntur et! Nulla quisquam voluptatibus praesentium minus aut, inventore repellat ex consectetur molestias, at perferendis enim rem amet maiores temporibus esse! Facere porro voluptate earum laboriosam. Aperiam, odio? Minima fugiat nihil illo assumenda animi tempora architecto porro saepe excepturi dolor sit consequuntur expedita ex ipsam accusantium, cum distinctio nostrum?</Text>
                    </View>
                  )
                }
                return elements;
              })()
            }
          </ScrollView>
        </View>
      </Fragment>
    );
  }
}

const styles = StyleSheet.create({
  container: {
    backgroundColor: '#F5FCFF',
    height: (Dimensions.get('window').height - 50),
  },
  menu: {
    flexDirection: 'row',
    justifyContent: 'space-around',
    backgroundColor: '#000',
    height: 50,
    alignItems: 'center'
  }
});