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You're reading from Hands-On Design Patterns with Swift Master Swift best practices to build modular applications for mobile, desktop, and server platforms

Product type Paperback

Published in Dec 2018

Publisher Packt

ISBN-13 9781789135565

Length 414 pages

Edition 1st Edition

Languages

Swift

Tools

Foundation

Concepts

Design Patterns

Authors (3):

Giordano Scalzo

Florent Vilmart

Sergio De Simone

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Table of Contents (17) Chapters

Preface

1. Refreshing the Basics FREE CHAPTER

2. Understanding ARC and Memory Management

3. Diving into Foundation and the Standard Library

4. Working with Objective-C in a Mixed Code Base

5. Creational Patterns

6. Structural Patterns

7. Behavioral Patterns

8. Swift-Oriented Patterns

9. Using the Model-View-Controller Pattern

10. Model-View-ViewModel in Swift

11. Implementing Dependency Injection

12. Futures, Promises, and Reactive Programming

13. Modularize Your Apps with Swift Package Manager

14. Testing Your Code with Unit and UI Tests

15. Going Out in the Open (Source)

16. Other Books You May Enjoy

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The observer pattern

The observer pattern is used when many objects need to listen to changes in one or many other objects.

NotificationCenter is one of the oldest APIs in Foundation, available since macOS 10+ and iOS 2.0, and is used to implement the observer pattern quickly and safely. Using NSObject, it is also possible to use Key-Value Observing (KVO) to observe changes in objects.

In pure Swift, however, you will need to use a third-party object as the NotificationCenter in order to listen to change events. Swift also provides a simple observation mechanism that notifies you when local values are updated.

Event-based programming

Observation is a popular programming strategy that lets you derive the current...

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Authors (3)

Vilmart

Florent Vilmart, M.Sc. is a full stack engineer in Montreal. Born in France, he moved to Montreal short before graduating looking for exciting opportunities in the francophone metropole of North-America. He honed his skills with Objective-C before jumping to Swift when it was released. Hes a polyglot, and you can find his open source work on the parse-community GitHub project where he is one of the core maintainers of the multiple projects. He also spoke at conferences like the GithubCodeConf in 2016 and most recently the Swift Summit in 2017. Currently, he is working full time with Swift, Javascript, and Kubernetes and leads a team of 6 engineers.

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De Simone

Sergio De Simone has been working as a software engineer for over twenty years across a range of different projects and companies, including work environments such as Siemens, HP, and small start-ups. For the last few years, his focus has been on developing mobile platforms and related technologies. He is currently working for BigML, Inc., where he leads iOS and OS X development. Additionally, he likes writing about technology, as well as programming tools, techniques, and languages, with a special focus on Swift evolution, for InfoQ.

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Giordano Scalzo

Giordano Scalzo is a developer with 20 years of programming experience, since the days of ZX Spectrum. He has worked in Swift, Objective-C, C/C++, Java, .Net, Ruby, Python, and in a ton of other languages that he has forgotten the names of. After years of backend development, over the past 10 years, Giordano has developed extensively for iOS, releasing more than 20 apps—apps that he wrote for clients, enterprise applications, or on his own. He is currently a Tech Lead Consultant in London, where he leads mobile digital transformations through his company, Effective Code Ltd.

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