React Native MapView：undefined不是对象

Question

I am a beginner in React Native and I am trying to use the MapView component from the 'react-native-maps' module.

This is my code:

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


export default class LocationDisplay extends Component<{}> {

  render() {
    return (
      <MapView/>
    );
  }
}

AppRegistry.registerComponent('LocationDisplay', () => LocationDisplay)

I am getting this error:

undefined is not an object (evaluating ‘_react.PropTypes.string’)

Can Anyone Help me?

Answer 1

PropTypes used to be included in React, but is now a separate package.

npm i prop-types

Changes from:

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

to

import React, { Component } from 'react';
import PropTypes from 'prop-types';

Example usage:

class Item extends Component {
    static propTypes = {
        data: PropTypes.object.isRequired
    };
}