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React and React Native

You're reading from   React and React Native Build cross-platform JavaScript apps with native power for mobile, web and desktop

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Product type Paperback
Published in Mar 2017
Publisher Packt
ISBN-13 9781786465658
Length 500 pages
Edition 1st Edition
Languages
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Author (1):
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Adam Boduch Adam Boduch
Author Profile Icon Adam Boduch
Adam Boduch
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Toc

Table of Contents (27) Chapters Close

Preface 1. Why React? 2. Rendering with JSX FREE CHAPTER 3. Understanding Properties and State 4. Event Handling – The React Way 5. Crafting Reusable Components 6. The React Component Lifecycle 7. Validating Component Properties 8. Extending Components 9. Handling Navigation with Routes 10. Server-Side React Components 11. Mobile-First React Components 12. Why React Native? 13. Kickstarting React Native Projects 14. Building Responsive Layouts with Flexbox 15. Navigating Between Screens 16. Rendering Item Lists 17. Showing Progress 18. Geolocation and Maps 19. Collecting User Input 20. Alerts, Notifications, and Confirmation 21. Responding to User Gestures 22. Controlling Image Display 23. Going Offline 24. Handling Application State 25. Why Relay and GraphQL? 26. Building a Relay React App

Loading images

Let's get things started by figuring out how to actually load images. You can render the <Image> component and pass it properties just like any other React component. But this particular component needs image blob data to be of any use. Let's look at some code:

import React, { PropTypes } from 'react'; 
import { 
  AppRegistry, 
  View, 
  Image, 
} from 'react-native'; 
 
import styles from './styles'; 
 
// Renders two "<Image>" components, passing the 
// properties of this component to the "source" 
// property of each image. 
const LoadingImages = ({ 
  reactSource, 
  relaySource, 
}) => ( 
  <View style={styles.container}> 
    <Image 
      style={styles.image} 
      source={reactSource} 
    /> 
    <Image 
      style={styles.image} 
      source={relaySource} 
    /> 
  </View> 
); 
 
// The "source" property can be either 
// an object with a "uri...
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