Technical requirements
The Xcode playground for this chapter is in the Chapter08 folder of the code bundle for this book, which can be downloaded here:
https://github.com/PacktPublishing/iOS-17-Programming-for-Beginners-Eighth-Edition
Check out the following video to see the code in action:
If you wish to start from scratch, create a new playground and name it ProtocolsExtensionsAndErrorHandling. You can type in and run all the code in this chapter as you go along. Let’s start with protocols, which is a way of specifying properties and methods that a class, structure or enumeration should have.
