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

The AddExpenses container and modal

When planning this app, I wrote that once a budget for the month has been set, the user should be shown a screen that contains a button to add their expenses for the month.

The button's behavior was also detailed, and we said that upon tapping on that button, the user should be shown a modal that allows them to input details for their expenses--the name, amount, date the purchase was made on, and an icon to categorize the item. The modal should allow the user to either cancel or save the entry they make.

We can create one component to add expenses that will contain both the Button and Modal, with the Modal defaulting to a hidden state unless activated by the Button.

Let's start by creating a component, titled AddExpenses, which will start off by doing the following things:

  • Accepting the month and year as props
  • Rendering a Button that, when pressed, will alert the user for now

Additionally, we should render the AddExpenses component within App.js:

// Expenses...