React Native

Overview

React Native enables using JavaScript and React to implement Android and iOS applications.

There are two command-line tools that can be used to create and run React Native applications, Expo and the React Native CLI.

Install the Expo CLI by entering npm install -g expo-cli.
Create a new Expo project by entering `expo init app-name.
cd app-name
Change the Text rendered by App.js to “Hello, World!”
Start the Expo server by entering npm start.

This displays a QR code in the default web browser.
Install the “Expo Go” app on a mobile device.
Launch the camera app.
Scan the QR code displayed in the web browser.

Install Node.js if not already installed.

One way is to install Homebrew and then enter brew install node.
Install watchman by entering brew install watchman.
Install Xcode from the Mac App Store.
Install the “Xcode Command Line Tools”.
Install CocoaPods by entering sudo gem install cocoapods.
Create a new project by entering npx react-native init app-name.
cd app-name
Start a Metro server by entering npx react-native start.
Run the app in the Simulator by entering npx react-native run-ios in another terminal.
To run the app on a device:
- Attached the device to the computer using a USB cable.
- Open the app in Xcode.
- Register for an Apple developer account.