React-Native app doesn't display anything - react-native

Question

I'm an absolute newbie when it comes to react-native. I've been following a tutorial, but not all of the code is provided. I've done my best - the app compiles - but all I see is a blank white page in iOS simulator. Can anyone help me understand why I'm not seeing the labels from the SearchPage component?
App.js:
/**
* Sample React Native App
* https://github.com/facebook/react-native
* #flow
*/
'use strict';
import React, { Component } from 'react';
import {
Platform,
StyleSheet,
Text,
View,
NavigatorIOS
} from 'react-native';
import SearchPage from './SearchPage';
const instructions = Platform.select({
ios: 'Press Cmd+R to reload,\n' +
'Cmd+D or shake for dev menu',
android: 'Double tap R on your keyboard to reload,\n' +
'Shake or press menu button for dev menu',
});
export default class App extends Component<{}> {
render() {
return (
<NavigatorIOS
style={styles.container}
initialRoute={
{
title: 'Property Finder',
component: SearchPage,
}
} />
);
}
}
const styles = StyleSheet.create({
container: {
flex: 1,
justifyContent: 'center',
alignItems: 'center',
backgroundColor: '#F5FCFF',
},
welcome: {
fontSize: 20,
textAlign: 'center',
margin: 10,
},
instructions: {
textAlign: 'center',
color: '#333333',
marginBottom: 5,
},
description: {
fontSize: 18,
textAlign: 'center',
color: '#656565',
marginTop: 65,
},
});
SearchPage.js:
'use strict';
import React, { Component } from 'react';
import {
StyleSheet,
Text,
TextInput,
View,
Button,
ActivityIndicator,
Image,
} from 'react-native';
export default class SearchPage extends Component<{}> {
render() {
return (
<View style={styles.container}>
<Text style={styles.description}>
Search for houses to buy!
</Text>
<Text style={styles.description}>
Search by place-name or postcode.
</Text>
</View>
);
}
}
const styles = StyleSheet.create({
description: {
marginBottom: 20,
fontSize: 18,
textAlign: 'center',
color: '#656565'
},
container: {
padding: 30,
marginTop: 65,
alignItems: 'center'
},
});
If I replace App.render() with the guts of SearchPage.render(), then I do see the 2 labels.
The tutorial is iOS-specific. Simulator is iPhone 6 iOS 11.2.
If any other info is needed please leave a comment.