Book Image

React Native By Example

By : Richard Kho
Book Image

React Native By Example

By: Richard Kho

Overview of this book

React Native's ability to build performant mobile applications with JavaScript has resulted in its popularity amongst developers. Developers now have the luxury to create incredible mobile experiences that look and feel native to their platforms with the comfort of a well-known language and the popular React.js library. This book will show you how to build your own native mobile applications for the iOS and Android platforms while leveraging the finesse and simplicity of JavaScript and React. Throughout the book you will build three projects, each of increasing complexity. You will also link up with the third-party Facebook SDK, convert an app to support the Redux architecture, and learn the process involved in making your apps available for sale on the iOS App Store and Google Play. At the end of this book, you will have learned and implemented a wide breadth of core APIs and components found in the React Native framework that are necessary in creating great mobile experiences.
Table of Contents (17 chapters)
Title Page
About the Author
About the Reviewer
Customer Feedback

Grabbing user geolocation data

The Geolocation API for React Native is an extension of the Web Geolocation API. It's available by calling navigator.geolocation and does not need to be imported.


Location data is a very important part of the mobile experience and as a best practice, this data should not be requested from your users until there is an explicit benefit for the user to provide the said information.

As location data is private until the user consents to share it with you, treat the sharing of this information as a bond of trust between the user and your app.

Always make the assumption that your users will select No when asked to share their location, and devise a strategy for how to handle that rejection when it inevitably happens.

On iOS, if you created your project using React Native in it, Geolocation will be enabled by default. If not, you will need to go to your Info.plist file and add the NSLocationWhenInUsageDescription key to it.

On Android devices, you will need to add...