iOS Programming: The Big Nerd Ranch Guide, 7th Edition

For the More Curious: Manually Conforming to Codable

In this chapter, you took advantage of automatic conformance to the Codable protocol and did not need to implement encode(to:) or init(from:) yourself. What if you had some property that was not codable? Let’s take a look at how to implement those two methods.

The code you add in this section will conflict with later chapters, so create a copy of your LootLogger project to work in, as you do for challenges. Open Item.swift. Create a new enumeration to describe the category of an item and add a property to reference the category.

Listing 13.11  Adding a Category enumeration (Item.swift)

enum Category {
    case electronics
    case clothing
    case book
    case other
}

var category = Category.other ...