Swift in Depth

Chapter 3. Writing cleaner properties

This chapter covers

• How to create getter and setter computed properties
• When (not) to use computed properties
• Improving performance with lazy properties
• How lazy properties behave with structs and mutability
• Handling stored properties with behavior

Cleanly using properties can thoroughly simplify the interface of your structs, classes, and enums, making your code safer and easier to read and use for others (and your future self). Because properties are a core part of Swift, following the pointers in this chapter can help the readability of your code straight away.

First, we cover computed properties, which are functions that look like properties. Computed properties can clean up the interface of ...