Book Image

Hands-On Design Patterns with Swift

By : Florent Vilmart, Giordano Scalzo, Sergio De Simone
Book Image

Hands-On Design Patterns with Swift

By: Florent Vilmart, Giordano Scalzo, Sergio De Simone

Overview of this book

Swift keeps gaining traction not only amongst Apple developers but also as a server-side language. This book demonstrates how to apply design patterns and best practices in real-life situations, whether that's for new or already existing projects. You’ll begin with a quick refresher on Swift, the compiler, the standard library, and the foundation, followed by the Cocoa design patterns – the ones at the core of many cocoa libraries – to follow up with the creational, structural, and behavioral patterns as defined by the GoF. You'll get acquainted with application architecture, as well as the most popular architectural design patterns, such as MVC and MVVM, and learn to use them in the context of Swift. In addition, you’ll walk through dependency injection and functional reactive programming. Special emphasis will be given to techniques to handle concurrency, including callbacks, futures and promises, and reactive programming. These techniques will help you adopt a test-driven approach to your workflow in order to use Swift Package Manager and integrate the framework into the original code base, along with Unit and UI testing. By the end of the book, you'll be able to build applications that are scalable, faster, and easier to maintain.
Table of Contents (22 chapters)
Title Page
Copyright and Credits
About Packt
Contributors
Preface
Index

Summary


In conclusion, you should now be able to understand when it makes sense to use the MVVM pattern, and its advantages and limitations over the more native MVC pattern.

We also quickly covered the use of two-way data binding, and how this technique, borrowed from the Reactive world, can help you to bind view models to their views simply and effectively.

Note

Architectural patterns are not a one-size-fits-all solution. It is appropriate and actually encouraged, to leverage the right solutions for the right problems. Always be mindful when adopting a pattern, as each has its benefits and drawbacks.

We can compare the MVVM philosophy to the dependency injection technique. In this technique, the elements that are required for an object or function to perform a particular task (in the MVVM, it would be the view model) are provided at runtime. We'll jump into the specifics of dependency injection in Swift in the next chapter.