PickupMapView.js

import React, { Component } from 'react';
import { View, Alert } from 'react-native';
import { MapView } from 'expo';

class PickupMapView extends Component {
  render() {
    console.log(this.state);
    return (
      <MapView
        style={{ flex: 1 }}
        initialRegion={{
          latitude: 37.78825,
          longitude: -122.4324,
          latitudeDelta: 0.0922,
          longitudeDelta: 0.0421
        }}
      />
    );
  }
}

export default PickupMapView;