Lesson 12 - Type casting and object hierarchy in Swift
In the previous lesson, Protocols (interfaces) in Swift, we learned about protocols and created a
Pterodactyl class.
In today's Swift tutorial, we're going to continue working on this project. We'll also go over type casting and reveal more secrets of the object-oriented programming.
Type casting
Let's go back to our previous project (the one for protocols) and change the
code in the main.swift file to have our pterodactyl stored in a
variable of the BirdProtocol type:
let bird : BirdProtocol = Pterodactyl()
We're allowed to do that because the Pterodactyl class
implements
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You'll learn how to cast an instance to another data type using protocols in Swift. You'll also learn to create an object hierarchy.
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