React Native: cross-platform mobile app development 

Your host Senne Van Cauwenberge Android & React Native Consultant [email protected] @appfoundry 

AppFoundry 

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What to expect: ◦ The origins of React Native ◦ The 0s and 1s of React Native ◦ Hands-on lab ◦ ? ◦ Profit! React Native 

The origins of React Native ◦ Hackathon in 2013 @ ◦ React JS ◦ Van closed naar open-source ◦ v0.0.1 – maart 2015 ◦ v.0.11 – september 2015 

The origins of React Native ◦ Februari 2016: # commits extern > intern 2015 - 2016 

The origins of React Native https://octoverse.github.com 

The origins of React Native 

The 0s and 1s of React Native 

The 0s and 1s of React Native 0: Write Once, Run Anywhere 1: Learn Once, Write Anywhere 

The 0s and 1s of React Native 0: gemakkelijk en snel voor meerdere platformen tegelijkertijd ontwikkelen 1: gemakkelijk en snel voor een specifiek platform ontwikkelen “Different platforms have different looks, feels, and capabilities, and as such, we should still be developing discrete apps for each platform, but the same set of engineers should be able to build applications for whatever platform they choose, without needing to learn a fundamentally different set of technologies for each.” - Tom Occhino 

The 0s and 1s of React Native 0: WebViews – using React 1: Native counterparts, platform specific components React JavaScriptCore Higher-level platform-specific components “The bridge” 10/10 would not recommend 

The 0s and 1s of React Native 0: , , , 1:

Coding Example The 0s and 1s of React Native import React, { Component } from 'react' import { Text, View } from 'react-native' class UIComponentsSample extends Component { render() { return ( If you like React on the web, you'll like React Native. You just use native components like 'View' and 'Text', instead of web components like 'div' and 'span'. ); } } ... render() { return ( ); } … render() { return ( ); } 

The 0s and 1s of React Native 0: classNames & pure CSS 1: style objecten in JavaScript 

Coding Example The 0s and 1s of React Native import React, { Component } from 'react'; import { Text, View, StyleSheet } from 'react-native' class WhatsYourStyle extends Component { render() { return ( Some red text. Some big text in blue. Some big bold blue text overwritten to red. Some text styled inline to be huge and green. ) } } const styles = StyleSheet.create({ bigblue: { color: 'blue', fontWeight: 'bold', fontSize: 30 }, red: { color: 'red' } }) 

The 0s and 1s of React Native 0: JavaScript + Native code 1: JavaScript + Native Code 

The 0s and 1s of React Native 0: Windows supported 1: Windows not supported 

Hands-on lab 

Hands-on lab ◦ Setup ◦ Routing/Navigation ◦ Containers ◦ Components ◦ Native modules ◦ Testing ◦ Deployment ◦ Follow-up 

Hands-on: Setup ◦ $ node –v (min. v6) ◦ $ npm install -g create-react-native-app of $ yarn global add create-react-native-app ◦ $ create-react-native-app rn-intro ◦ Emulator / Simulator / Device ◦ $ npm install -g react-native-cli (niet verplicht) ◦ OS X: $ brew install watchman (mss nodig) 

$ node –v $ npm install -g create-react-native-app of $ yarn global add create-react-native-app $ create-react-native-app rn-intro Hands-on: Setup Create React Native App ◦ Minimal ‘Time to Hello World” ◦ Test anywhere (emu/sim/device) ◦ 1 build tool (no xcode/android studio/..) ◦ No lock-in (“eject”-able om zelf controle te nemen) ◦ Expo 

$ node –v $ npm install -g create-react-native-app of $ yarn global add create-react-native-app $ create-react-native-app rn-intro Hands-on: Setup Expo ◦ Injecteert eigen SDK met native modules ◦ Audio, Bluetooth, Contacts, Location, MapView, … ◦ Klein nadeel: delayed releases ◦ Build tool (via Expo of stand-alone) ◦ Via Expo app overal testbaar ◦ Guides/documentatie 

Hands-on: Setup ◦ $ create-react-native-app rn-intro ◦ $ cd /rn-intro 

Create React Native App ◦ $ npm start ◦ $ npm test ◦ $ npm run ios ◦ $ npm run android ◦ $ npm run eject (onomkeerbaar!) Hands-on: Setup 

◦ $ npm start ◦ Developer menu ◦ Reload: refresh JavaScript shortcut RR / ⌘ R ◦ Debug JS Remotely: Chrome - React Developer Tools ◦ Live Reload: ipv manueel ◦ Hot Reload: ipv full reload ◦ Inspector: overlay om UI elementen te inspecteren ◦ Perf Monitor: fps Hands-on: Setup 

Hands-on: Routing ◦ Setup Routing/Navigation ◦ Containers ◦ Components ◦ Native modules ◦ Testing ◦ Deployment ◦ Follow-up 

Hands-on: Routing React Native Navigation ◦ 100% Native ◦ Wix engineering ◦ ~setup React Navigation ◦ Native/JavaScript mix ◦ Expo React Native Router Flux ◦ React Navigation + Flux Patroon 

React Navigation ◦ StackNavigator – TabNavigator – DrawerNavigator ◦ Redux ◦ Deep linking (rnapp://return/item) ◦ Screen tracking (analytics) ◦ Configurable ◦ Customizable ◦ Documentatie soms wat vaag Hands-on: Routing 

Hands-on: Routing StackNavigator ◦ npm install react-navigation –save ◦ https://reactnavigation.org 

Hands-on lab ◦ Setup ◦ Routing/Navigation Containers Components ◦ Native modules ◦ Testing ◦ Deployment ◦ Follow-up 

Hands-on lab Containers ◦ Logica (smart) ◦ Stateful ◦ Data handling ◦ Higher-order Components ◦ Redux, Relay, Flux, MobX ◦ Vb: SideBarContainer, HeaderContainer, UserList, … Components ◦ Geen logica (dumb) ◦ Stateless ◦ Data receiving ◦ Vb: SideBarItem, HeaderTitle, HeaderIcon, UserListItem, … 

Hands-on lab Top-down data flow HomeScreen Form Name field Header Greeting message 

Hands-on lab ◦ Setup ◦ Routing/Navigation ◦ Containers ◦ Components Native modules ◦ Testing ◦ Deployment ◦ Follow-up 

Hands-on lab ◦ Setup ◦ Routing/Navigation ◦ Containers ◦ Components ◦ Native modules Testing ◦ Deployment ◦ Follow-up 

Hands-on: Testing Jest ◦ React Native OG ◦ Eenvoudige setup ◦ Snapshots ◦ Auto-migrate ◦ Ook voor Web frameworks Redux, Angular, Vue, MobX 

Hands-on: Testing Detox ◦ end-to-end testing ◦ Emulator ◦ iOS, Android soon™ ◦ Werkt niet op sommige versies van React Native 

Hands-on lab ◦ Setup ◦ Routing/Navigation ◦ Containers ◦ Components ◦ Native modules ◦ Testing Deployment ◦ Follow-up 

Hands-on: Deployment Deployment ◦ Expo account nodig ◦ app.json: naam, splash, icon, scheme, keys, … ◦ App / Play store: stand-alone builds (beta) ◦ $ exp start ◦ $ exp build: ◦ Expo: ◦ $ exp publish ◦ Silent remote updates 

Hands-on lab ◦ Setup ◦ Routing/Navigation ◦ Containers ◦ Components ◦ Native modules ◦ Testing ◦ Deployment Follow-up 

Hands-on: Follow-up Follow-up ◦ Analytics ◦ Firebase Analytics ◦ Fabric.io ◦ Error-tracking ◦ Sentry ◦ Crashlytics (Fabric.io) ◦ Firebase Crash Reporting 

Hands-on: Follow-up Follow-up ◦ Updates ◦ Expo ◦ CodePush ◦ New builds 

The magical world of NPM JS.coach 

..? Profit! 

Questions? Senne Van Cauwenberge Android & React Native Consultant [email protected] @appfoundry 

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