React Native Cookbook - Second Edition

How to do it...

1. Let's start by adding dependencies to the App.js file, as follows:

import React, { Component } from 'react';import {  StyleSheet,  Text,  View} from 'react-native';import Button from 'react-native-button';import TouchID from 'react-native-touch-id';

2. Next we'll define that App class and the initial state. We'll keep track of the authentication status on the authStatus property of state, as follows:

export default class App extends Component {  state = {    authStatus: null  }  // Defined in following steps}

3. Let's define the authenticate method, which will be fired on button press, and will initiate authentication on the device. We can initiate authentication by executing the TouchID component's authenticate method. This method's ...