Tentando navigar

gistfile1.txt

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

import React, { Component } from 'react';
import {
  Text,
  View,
  Button
} from 'react-native';
import {StackNavigator} from 'react-navigation';
import Scan from './tela2'

const routes = StackNavigator({
	tela2 : Scan
})

export default class App extends Component {
 static navigationOptions = {
    title: 'Welcome',
  };
  render() {
    const { navigate } = this.props.navigation;
    return (
      <Button
        title="Go to Jane's profile"
        onPress={() =>
          navigate('tela2')
        }
      />
    );
  }
}