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
Credits
Foreword
About the Author
About the Reviewer
www.PacktPub.com
Customer Feedback
Preface

Button


Let's build a clear due date button for the EditTask component and only selectively enable it if a due date has been selected for the to-do item. The Button component in React Native should help us render one quickly.

The Button component accepts a couple of props; the following four will be used in our application:

  • color: This is a string (or stringified hex) that sets either the text color on iOS or the background color on Android
  • disabled: This is a Boolean that disables the button if set to true; it defaults to false
  • onPress: This is a callback that is fired when a button is pressed
  • title: This is the text to display within the button

A sample Button component can be rendered like this:

<Button 
  color={ 'blue' } 
  disabled={ this.state.buttonDisabled } 
  onPress={ () => alert('Submit button pressed') } 
  title={ 'Submit' }  
/> 

Modify EditTask so that it has the following features:

  • It contains a Boolean, titled expanded, in its state to control the open/closed status of...