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MVVM

MVVM is an architecture that separates UI logic from business logic, consisting of three key components: Model, View, and ViewModel. It offers advantages such as simplified architecture, separation of concerns, compatibility with SwiftUI, and improved testability, but also faces challenges like scaling issues and a lack of clear structure for larger applications. As applications grow, ViewModels may become bloated and managing dependencies can become difficult.

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59 views1 page

MVVM

MVVM is an architecture that separates UI logic from business logic, consisting of three key components: Model, View, and ViewModel. It offers advantages such as simplified architecture, separation of concerns, compatibility with SwiftUI, and improved testability, but also faces challenges like scaling issues and a lack of clear structure for larger applications. As applications grow, ViewModels may become bloated and managing dependencies can become difficult.

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Amazing Deals
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© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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MVVM: Model-View-ViewModel Architecture

MVVM is a simple and lightweight architecture primarily focused on separating UI logic (View) from business logic
(ViewModel).

Key Components:

1. Model: Represents the app’s domain and data (e.g., network responses, database entities).

2. View: UI layer (UIView or SwiftUI `View`) that directly presents data to the user.

3. ViewModel: Acts as the mediator between the View and Model. It processes data from the Model and prepares it for the
View, making the View “dumb” and less dependent on specific logic.

Advantages of MVVM:

1. Simplified Architecture:

- Easy to understand and implement.

- Reduces boilerplate code.

- Great for small to medium-sized apps.

2. Separation of Concerns:

- Views manage UI-related tasks, while ViewModels encapsulate business logic.

3. SwiftUI Benefits:

- Direct binding of data via `@Published`, `ObservableObject`, or `Combine`, making MVVM highly compatible with
SwiftUI.

4. Improved Testability:

- The ViewModel can be unit tested independently since it does not directly depend on the View.

Disadvantages of MVVM:

1. Scaling Challenges:

- As applications grow, ViewModels can become bloated, trying to handle too many responsibilities (business logic,
validation, data transformations, etc.).

- DiWicult to manage dependencies when multiple ViewModels require access to shared resources.

2. No Clear Layers Beyond ViewModel:

- MVVM does not enforce strict rules for structuring business rules, data sources, or external services, increasing the
risk of tightly coupled components in larger apps.

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