November 2020
Intermediate to advanced
766 pages
15h 29m
English
Content preview from iOS 14 Programming for Beginners - Fifth Edition
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Chapter 8: Protocols, Extensions, and Error Handling
In the last chapter, you learned how to represent complex objects using classes or structures and how to use enumerations to group related values together.
To end this section on Swift, you'll learn about protocols, extensions, and error handling. Protocols define a blueprint of methods, properties, and other requirements that can be adopted by a class, structure, or enumeration. Extensions enable you to provide new functionality for an existing class, structure, or enumeration. Error handling covers how to handle errors in your program.
By the end of this chapter, you'll be able to write your own protocols to meet the requirements of your apps, use extensions to add new capabilities to existing ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.