无法读取未定义的属性'geocodeAddress'

Question

任何人都可以帮助我解决 react-native-geocode 中的此错误。

import Geocoder from 'react-native-geocoder';

module.exports = React.createClass({
  componentDidMount() {
    this.searchEvents('hackathon', 'London');
  },

  searchEvents(category, city) {
    Geocoder.geocodeAddress('London').then(response => {
      console.log('response', response);
    });
});