Delegation in Swift

Boss those classes

Photo by Brooke Lark on Unsplash

Prerequisites:

• Be able to produce a “Hello, World!” iOS application (guide HERE)
• Be comfortable with Classes in Swift (guide HERE)
• Some understanding of callbacks (closures) in Swift would be useful(guide HERE)
• I’ve used segues to pass information in part of the demo (guide HERE)

Terminology

Delegation: A pattern that enables a class to delegate responsibility for some actions to an instance of another class

Protocol: A blueprint on methods, properties and requirements to suit a piece of functionality

UITableView: A view that presents data using rows arranged in a single column

Why delegate?

The real life proxy

So the word delegate in the English language is about giving responsibility for a task to another person.

Your boss might delegate opening the office to a deputy, particularly if the boss is on vacation.

If a boss is poor at delegation, they take on too many tasks

The iOS application