Why clean architecture maintains codebases in iOS Swift - Quick Recap

Recall & Review

beginner

What is the main goal of clean architecture in iOS development?

To organize code so it is easy to understand, test, and change without breaking other parts.

beginner

How does clean architecture help maintain large codebases?

By separating concerns into layers, it keeps code independent and easier to update or fix.

intermediate

What are the typical layers in clean architecture for iOS apps?

Entities (business rules), Use Cases (application logic), Interface Adapters (UI and data), Frameworks & Drivers (external systems).

intermediate

Why is dependency rule important in clean architecture?

It ensures that code dependencies point inward, so inner layers don’t depend on outer layers, making changes safer.

intermediate

How does clean architecture improve testing in iOS apps?

By isolating business logic from UI and external systems, it allows writing tests that are fast and reliable.

Which layer in clean architecture contains the business rules?

A Interface Adapters

B UI Layer

C Frameworks & Drivers

D Entities

Entities hold the core business rules and data models.

What does the dependency rule in clean architecture enforce?

A Outer layers depend on inner layers

B Inner layers depend on outer layers

C All layers depend on each other equally

D No dependencies allowed

Dependencies always point inward, so outer layers depend on inner layers.

Why is separating UI from business logic helpful?

A It makes testing business logic easier

B It mixes responsibilities

C It slows down app performance

D It makes UI code longer

Separating UI from business logic allows testing logic without UI dependencies.

Which benefit does clean architecture NOT provide?

A Better testability

B Easier to maintain code

C Faster app startup time

D Clear separation of concerns

Clean architecture focuses on code structure, not app startup speed.

In clean architecture, where do external frameworks and libraries belong?

A Use Cases layer

B Frameworks & Drivers layer

C Entities layer

D Interface Adapters layer

External systems are placed in the outer Frameworks & Drivers layer.

Explain how clean architecture helps keep an iOS app codebase easy to maintain over time.

Think about how dividing code into parts helps when you want to change or fix something.

Describe the role of the 'Use Cases' layer in clean architecture and why it is important.

Consider where the app decides what to do with data and user actions.