Swift Programming Tutorial: Delegation

Easily Grasp the Concept of Delegation in Swift

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Delegation is one of those design patterns in Swift that made me go, “Wait, what just happened?” the first time I encountered it. To be honest, even now, I still have to revisit my notes after not using delegation for a while to review the concept again. Because I keep forgetting it.

This article is part of my Swift Programming Tutorial series.

What is Delegation?

Delegation is like having a personal assistant. Instead of doing everything yourself, you delegate (pass on) some of your responsibilities to someone else (another class or object).

Imagine you’re hosting a party. You don’t have time to check if the guests have RSVPed, so you assign that task to your assistant. You’re still in charge of the party, but you’re relying on them to handle that one responsibility.

In Swift, delegation lets one object (the delegator) hand off responsibility for a task to another object (the delegate). It’s a way of making your code modular, reusable, and easy to maintain.

Why Use Delegation?

1. Flexibility: It allows one class to interact with another without tightly coupling them. The delegator doesn’t care who…