App.js

/**
 * Sample React Native App
 * https://github.com/facebook/react-native
 * @flow
 */

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

const instructions = Platform.select({
  ios: 'Press Cmd+R to reload,\n' +
    'Cmd+D or shake for dev menu',
  android: 'Double tap R on your keyboard to reload,\n' +
    'Shake or press menu button for dev menu',
});

export default class App extends Component{

  componentDidMount() {

  }

  setRef = (scrollView) => {
    scrollView.scrollTo({y: 100, animated: false});
  }

  render() {
    return (
      <ScrollView
        ref = {this.setRef}
      >
        <View style={styles.container}>
          <Text style={styles.welcome}>
            Welcome to React Native!
          </Text>
          <Text style={styles.instructions}>
            The tests for this app will fail unless we use explicitly use the scrollView mock by facebook
          </Text>
          <Text style={styles.instructions}>
            {instructions}
          </Text>
        </View>
      </ScrollView>
    );
  }
}

const styles = StyleSheet.create({
  container: {
    flex: 1,
    justifyContent: 'center',
    alignItems: 'center',
    backgroundColor: '#F5FCFF',
  },
  welcome: {
    fontSize: 70,
    textAlign: 'center',
    margin: 10,
  },
  instructions: {
    fontSize: 90,
    textAlign: 'center',
    color: '#333333',
    marginBottom: 5,
  },
});