Functional Reactive Programming on iOS

Retired

This book is no longer available for sale.

Functional Reactive Programming on iOS

Functional reactive programming introduction using ReactiveCocoa

About the Book

Note: This book relied upon the 500px API, which is no longer accessible. I have retired the book. If you recently purchased a copy, please request a refund. Thanks!

1. Functional Philosophy

Before we can talk about Functional Reactive Programming on iOS, we need to deconstruct it into its two fundamental philosophies: functional programming married with reactive programming. 

2. Introducing RXCollections

In order to dip readers feet into the water, we're going to discuss RXCollections' map, filter, and fold functions. By showing the user these functions, we hope to impart them with the notion that we should not be worried about how they work, but rather what they do. 

3. ReactiveCocoa

In this chapter, we'll show how we can apply the same approaches from RXCollections using arrays as sequences. This introduces the concept of a signal and a stream.

4. Gluing it Together

Here's where things get interesting. We're going to guide the user through the process of writing a basic 500px iPhone app using the SDK I wrote for them. The SDK uses a standard Cocoa approach, and with it, we'll show how we can glue together standard Cocoa code into an app built using RAC. This demonstrates how to properly use subjects.

5. MVVM on iOS

This chapter introduces the Model-View-ViewModel paradigm and explains how it's useful on iOS. A front end to the application written in the previous chapter is written in order to show how MVVM works with ReactiveCocoa and increases the testability of iOS apps. While writing the view model, we'll demonstrate how to use commands appropriately. 

About the Author

Ash Furrow
Ash Furrow

Ash Furrow is a Canadian iOS developer and author, currently working at Artsy. He has published five books, built many apps, and is a contributor to the open source community. On his blog, he writes about a range of topics, from interesting programming to explorations of analogue film photography.

Table of Contents

  •  
    • Acknowledgements
  • Philosophy
    • Functional Reactive Programming
    • Conclusion
  • Functional Programming with RXCollections
    • Higher-Order Functions
    • Installing RXCollections
    • Map
    • Filter
    • Fold
    • Performance
    • Conclusion
  • Introduction to ReactiveCocoa
    • Installing ReactiveCocoa
    • Streams and Sequences
    • Signals
    • Subscriptions
    • Deriving State
    • Commands
    • RACSubject
    • Hot and Cold Signals
    • Multicasting
    • Conclusion
  • ReactiveCocoa in Practice
    • Basics of FunctionalReactivePixels
    • Adding to FunctionalReactivePixels
    • Revisiting FunctionalReactivePixels
    • Network Layer Revisited
    • Conclusion
  • Model View View-Model on iOS
    • What is MVVM?
    • Revisiting Functional Reactive Pixels
    • MVVM in Practice
    • Testing View Models
    • Final Thoughts

The Leanpub 60 Day 100% Happiness Guarantee

Within 60 days of purchase you can get a 100% refund on any Leanpub purchase, in two clicks.

Now, this is technically risky for us, since you'll have the book or course files either way. But we're so confident in our products and services, and in our authors and readers, that we're happy to offer a full money back guarantee for everything we sell.

You can only find out how good something is by trying it, and because of our 100% money back guarantee there's literally no risk to do so!

So, there's no reason not to click the Add to Cart button, is there?

See full terms...

80% Royalties. Earn $16 on a $20 book.

We pay 80% royalties. That's not a typo: you earn $16 on a $20 sale. If we sell 5000 non-refunded copies of your book or course for $20, you'll earn $80,000.

(Yes, some authors have already earned much more than that on Leanpub.)

In fact, authors have earnedover $13 millionwriting, publishing and selling on Leanpub.

Learn more about writing on Leanpub

Free Updates. DRM Free.

If you buy a Leanpub book, you get free updates for as long as the author updates the book! Many authors use Leanpub to publish their books in-progress, while they are writing them. All readers get free updates, regardless of when they bought the book or how much they paid (including free).

Most Leanpub books are available in PDF (for computers) and EPUB (for phones, tablets and Kindle). The formats that a book includes are shown at the top right corner of this page.

Finally, Leanpub books don't have any DRM copy-protection nonsense, so you can easily read them on any supported device.

Learn more about Leanpub's ebook formats and where to read them

Write and Publish on Leanpub

You can use Leanpub to easily write, publish and sell in-progress and completed ebooks and online courses!

Leanpub is a powerful platform for serious authors, combining a simple, elegant writing and publishing workflow with a store focused on selling in-progress ebooks.

Leanpub is a magical typewriter for authors: just write in plain text, and to publish your ebook, just click a button. (Or, if you are producing your ebook your own way, you can even upload your own PDF and/or EPUB files and then publish with one click!) It really is that easy.

Learn more about writing on Leanpub