Chapter 13. Swift patterns

This chapter covers

  • Mocking types with protocols and associated types
  • Understanding conditional conformance and its benefits
  • Applying conditional conformance with custom protocols and types
  • Discovering shortcomings that come with protocols
  • Understanding type erasure
  • Using alternatives to protocols

In this chapter, you’re going to see some useful patterns that you can apply in your Swift programming. I made sure that these patterns were more Swift-focused, as opposed to a more-traditional OOP focus. We’re focusing on Swift patterns, so protocols and generics take center stage.

First, you’re going to mock existing types with protocols. You’ll see how to replace a networking API with a fake offline one, and ...

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