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

Save button

In this section, we will create a button in the upper-right corner of the navigation bar that is labeled as Save. When it is tapped on, the following two things must happen:

  • The changes the user made to the to-do item (such as its name, completion status, and due date) must be saved to AsyncStorage, overwriting its previous details
  • The TasksList must be updated so that the user visually sees the changes they made right away

Rendering the Save button is easy with React Native. The object that gets pushed to NavigatorIOS needs to receive the following two key/value pairs:

  • rightButtonTitle: This is a string that renders the text shown in that area
  • onRightButtonPress: This is a callback that is fired when that button is pressed

At face value, this looks simple. However, we can't pass any information to the onRightButtonPress method of NavigatorIOS from a rendered child. Instead, we have to keep a copy of the changes we make inside our TasksList component as well, and update them as the...