Exploring Mac App Development Strategies
Exploring Mac App Development Strategies
Patterns & Best Practices for Clean Software Architecture on the Mac with Swift 3 and Tests
About the Book
Driven by Example, this Book Applies Useful Patterns of Clean Software Architecture to Mac App Development
You do some kind or other of what may be called "software architecture" anyway.
So better know the reasons for the moves you take. Own the alternatives, and design your code accordingly to gain confidence that your stuff is really working.
Learn how to …
- design reusable code,
- get a solid test harness up and running, and
- separate the components of your application.
All this will make your application easier to change and easier to maintain. It will make you a happier developer, even when you're just exploring new parts of the Cocoa Framework.
To develop Mac applications, you'll need to know why and how to separate components. Using the latest technology and a head-start into Swift programming, this book will show you the pro's and con's of several design decisions and discuss alternative approaches so you get to know your options.
The Core Ideas of the Book
I want to share the core ideas and theses of the book with you:
- Apple's Core Data is a very invasive framework. It works best when you couple everything, beginning at the user interface, to Core Data entities. Cocoa Bindings make a lot of the magic possible, but they come at a cost: the Core Data entities (or
NSManagedObjectsubclasses, for that matter) are bound to do a lot of different things for different "clients", wheras by 'client' I mean consuming views, background services, and the like. It'd be easier to maintain the code if you model entities for each "Bounded Context" separately.
- Adopting Domain-Driven Design thinking, small service objects are favorable. It's easy to create Data Transfor Objects in Swift using
structs, for example. Core Data should be pushed outside the domain (i.e. where the business logic is hosted) and become an implementation detail.
- Once you free your app from the entanglement by Core Data (and other Apple suggested best practices which don't scale well), you will be able to leverage powerful design patterns. I created domain event wrappers around
NSNotificationto make event handling easier and failure-proof. Using events to propagate changes (instead of using Bindings, for example) makes concurrent programming easier.
That's part of the topics we cover in this book. Maybe you won't be a DDD expert afterwards, but so neither am I. Instead, we'll explore useful patterns to make the code manageable and to get more comfortable ever writing Mac applications which are ready to scale.
The Book is Open Source, by the way!
The book is Open Source. You can contribute on GitHub:
Just create a pull request if you came up with a better description of something, or if you want to add a useful reference, for example. Together, we can make the book a lot better.
Your feedback is much appreciated!
- Who Is This Book For?
- Contributing to the Book Manuscript and Example Project
- Motivation to Write This Book
- The Example
- Architecture Overview
- Patterns & Principles
The Story of Developing a Clean App by Example
Part 1: Bootstrapping – Setting Up the Project, Core Data, and Unit Tests
How to Load Core Data
NSManagedObjects in Tests
- Introduce Repository and Its Collaborators for Tests
- Preparing the UI: Create View Controllers and Test Their Setup
- Use of Automated Tests
Boxes to the Strictly
- Functional Testing Helps Transition to Adding Real Features
- How to Load Core Data
Part 2: Sending Messages Inside of the App
- Naive Event Handler
- Ports and Adapters
Part 3: Putting a Domain in Place
- Introducing Events in Place of Notifications
- Error Handling
Part 4: Using Core Data for Convenience
- How to Change the Project to Put Core Data at It’s Center
- Abstract from Core Data
- Core Data in the UI
- Learning Through Writing
- The Use of Cocoa Bindings
- Objectives Accomplished?
- Part 1: Bootstrapping – Setting Up the Project, Core Data, and Unit Tests
- Interesting Links
- Interesting Books
- Strong Reference Cycles
- Access Rights VS Laissez-faire Objective-C
- On Swift
- Adopting Swift 2.0 Errors
- Further Reading
The Leanpub 45-day 100% Happiness Guarantee
Within 45 days of purchase you can get a 100% refund on any Leanpub purchase, in two clicks.
See full terms
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), EPUB (for phones and tablets) and MOBI (for 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.
Algebra-Driven DesignSandy Maguire
A how-to field guide on building leak-free abstractions and algebraically designing real-world applications.
Production HaskellMatt Parsons
Are you excited about Haskell, but don't know where to begin? Are you thrilled by the technical advantages, but worried about the unknown pitfalls? This book has you covered.
Machine Learning EngineeringAndriy Burkov
"If you intend to use machine learning to solve business problems at scale, I'm delighted you got your hands on this book."
—Cassie Kozyrkov, Chief Decision Scientist at Google
"Foundational work about the reality of building machine learning models in production."
—Karolis Urbonas, Head of Machine Learning and Science at Amazon
The Hundred-Page Machine Learning BookAndriy Burkov
Everything you really need to know in Machine Learning in a hundred pages.
Ansible for DevOpsJeff Geerling
Ansible is a simple, but powerful, server and configuration management tool. Learn to use Ansible effectively, whether you manage one server—or thousands.
OpenIntro StatisticsDavid Diez, Christopher Barr, Mine Cetinkaya-Rundel, and OpenIntro
A complete foundation for Statistics, also serving as a foundation for Data Science.
Leanpub revenue supports OpenIntro (US-based nonprofit) so we can provide free desk copies to teachers interested in using OpenIntro Statistics in the classroom and expand the project to support free textbooks in other subjects.
More resources: openintro.org.
Cloud StrategyGregor Hohpe
While most enterprises are moving to the cloud these days, many initiatives are driven by wishes or promises rather than a sound strategy. Harvested from half a decade of cloud migrations, this book shares frameworks, strategies, and anecdotes for a structured and decision-centric path to cloud success.
Sockets and PipesType Classes
Sockets and Pipes is not an introduction to Haskell; it is an introduction to writing software in Haskell. Using a handful of everyday Haskell libraries, this book walks through reading the HTTP specification and implementing it to create a web server.
C++ Best PracticesJason Turner
Level up your C++, get the tools working for you, eliminate common problems, and move on to more exciting things!
Practical FP in Scala: A hands-on approachGabriel Volpe
A practical book aimed for those familiar with functional programming in Scala who are yet not confident about architecting an application from scratch.
Together, we will develop a purely functional application using the best libraries in the Cats ecosystem, while learning about design patterns and best practices.
The Node.js Bundle
3 BooksThis bundle combines three bestselling Leanpub Node.js books into a package that gives you everything you need to get started with developing Node.js applications at an unbeatable price.
The Tester's Library
8 BooksThe Tester's Library consists of eight five-star books that every software tester should read and re-read. As bound books, this collection would cost over $200. Even as e-books, their price would exceed $80, but in this bundle, their cost is only $49.99. Here are the books, and why they should be in your library: Perfect Software and Other...
11 BooksIn this bundle, you will find 10 different agile books. They are about different aspects of being agile. - finding a job - doing coding dojo's - Retrospectives - Personal kanban - a non-typical coaching book and even a book that gives you an insight in the lives of some agile people.
WTFlop 6M + HU - Beta Bundle
Fifty Quick Ideas
3 BooksGet all three books for the price of two! Fifty Quick Ideas books are full of practical, real-world techniques that you can use to improve teamwork, build better products and build them in a better way.
Growing Agile: Coach's Guide Series
4 BooksThis bundle provides a collection of training and workshop plans for a variety of agile topics. The series is aimed at agile coaches, trainers and ScrumMasters who often find themselves needing to help teams understand agile concepts. Each book in the series provides the plans, slides, handouts and activity instructions to run a number of...
Marionette.js A to Z
Complete Scala Bundle
3 BooksScala is a general-purpose programming language and it's getting extremely popular these days. Some say that learning Scala could be a challenging task. My experience, however, suggests that this is actually a myth that has very little to do with reality. With the right approach, learning Scala can be easy, fun and rewarding.The first book from...
Build A Better Backbone App
3 BooksThe best way to learn new development skills is through experience, but that takes time you don't have.Get the best of both worlds with this bundle: you'll learn how to produce modern web applications by learning from experienced developers like Derick Bailey and David Sulc. BackboneJS is one of the favorite tools on the web today, but it...