Protocol Extensions in Swift
You can extend protocols too!
Protocol extensions are extremely powerful in Swift, but contain a couple of inherent limitations. To learn what they are, read on!
Difficulty: Beginner | Easy | Normal | Challenging
Prerequisites:
- Be able to produce a “Hello, World!” iOS application (guide HERE)
- Use of extensions in Swift (guide HERE)
Terminology
class: An object that defines properties and methods in common
Conform: Conforming to a protocol means that anything that conforms to the protocol contains the necessary behaviours specified
Extensions: Extensions add new functionality to a class, struct, enum or protocol
protocol: A blueprint on methods, properties and requirements to suit a piece of functionality
struct: An object defined in Swift, using pass by value semantics
Why extend a protocol?
A protocol allows objects, and provide a concrete implementation of any object that conforms to it. This allows addition of functionality into any types that conform to the protocol, and even better we can extend the functionality without changing the…
