Protocols & Extensions | watch at 1.5x

Protocols & Extensions in Swift | Mastering Flexible & Reusable Code

In this Swift tutorial, we dive deep into Protocols and Extensions, two of the most powerful features in Swift that help you write clean, reusable, and scalable code.
You’ll understand how Protocols define “what” needs to be done, and Extensions help you add functionality without modifying the original code.

What’s Covered in This Video
What Protocols are
How to define and use Protocols
Protocol Inheritance & Composition
The power of Extensions to enhance existing types
Combining Protocols and Extensions to create flexible & reusable designs
Best Practices for Protocols and Extensions
Common Questions & clarity that most developers struggle with


Why This Matters
Protocols & Extensions form the foundation of Swift and iOS architecture — including MVVM, SwiftUI, Combine, Dependency Injection, and more.
Once you truly understand them, your code becomes clean, testable, and future-proof.

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