undefined is not an object (evaluating ‘this.props.navigation.navigate’) – React Native

I am trying to make my first React Native Android app and I am getting this error:

undefined is not an object (evaluating ‘this.props.navigation.navigate’)

This is the code:

import React from 'react';
import { StyleSheet, Text, View, Button, TextInput } from 'react-native';
import { StackNavigator } from 'react-navigation';

export default class HomeScreen extends React.Component {

  static navigationOptions = {
    title: 'Home',
  };

  render() {
    const { navigate } = this.props.navigation;    

    return (
      <View>
        <Button 
          title="Show Centers near me"
          onPress={() =>
            navigate('Results', "Search Term")
          }
          />
        <Text>or</Text>
      </View>
    );
  }
}


class ResultsScreen extends React.Component {

  static navigationOptions = {
    title: 'Results',
  };


  render() {
  const { navigate } = this.props.navigation;

    return (
      <View>
        <Text>Hi</Text>
      </View>
    );
  }
}

const App = StackNavigator({
  Home: { screen: HomeScreen },
  Results: { screen: ResultsScreen }
});

I can not figure out why the error is coming.

Answer

You are exporting the component wrong. You should get rid of the export default on your class HomeScreen definition and at the bottom of the file do export default App;