Putting it all together

Let's see how the whole component's structure would look like when putting all the methods together:

/*** ShoppingList.js ***/

import React from 'react';
import { Alert } from 'react-native';
import { ... } from 'native-base';

export default class ShoppingList extends React.Component {
 static navigationOptions = {
   title: 'My Groceries List'
 };

 constructor(props) {
   ...
 }

 /*** User Actions Handlers ***/
 _handleProductPress(product) {
   ...
 }

 _handleAddProductPress() {
   ...
 }

 _handleClearPress() {
   ...
 }

 /*** Render ***/
 render() {
   ...
 }
}

The structure of a React Native component is very similar to a normal React component. We need to import React itself and then some components to build up our screen. We also have several event handlers (which we have prefixed with an underscore as a mere convention) and finally a render method to display our components using standard JSX.

The only difference with a React web app is the fact that we are using React Native UI components instead of DOM components.