Where to go from here?
You can download the finished project here.
In this tutorial you saw how to harness the power of iOS design patterns to perform complicated tasks in a straightforward manner. You've learned a lot of iOS design patterns and concepts: Singleton, MVC, Delegation, Protocols, Facade, Observer, and Memento.
Your final code is loosely coupled, reusable, and readable. If another developer looks at your code, they'll easily be able to understand what's going on and what each class does in your app.
The point isn't to use a design pattern for every line of code you write. Instead, be aware of design patterns when you consider how to solve a particular problem, especially in the early stages of designing your app. They'll make your life as a developer much easier and your code a lot better!
The long-standing classic book on the topic is Design Patterns: Elements of Reusable Object-Oriented Software. For code samples, check out the awesome project Design Patterns implemented in Swift on GitHub for many more design patters coded up in Swift.
Finally, be sure to check out Intermediate Design Patterns in Swift and our video course iOS Design Patterns for even more design patterns!
Have more to say or ask about design patterns? Join in on the forum discussion below!
