What are the differences between view models and view controllers?

What are the differences between view models and view controllers?

View models and view controllers serve different purposes in software architecture. View models manage the presentation logic and state, while view controllers handle user interactions and coordinate between the model and the view.

Can you give me an example of when to use a view model?

Sure! Use a view model when you need to separate the UI logic from the business logic, especially in MVVM architecture. For instance, in a data-binding scenario, a view model can provide data to the view without exposing the underlying model directly.

What about view controllers? When should I use them?

View controllers are ideal in MVC architecture, where they manage the flow of data between the model and the view. Use them when you need to handle user input and update the UI accordingly.

Are there any performance differences between using view models and view controllers?

Yes, performance can vary. View models can improve performance by reducing the amount of data passed to the view, while view controllers may introduce overhead if they handle too much logic. It's essential to balance responsibilities.

Can I use both in the same project?

Absolutely! Many projects benefit from using both view models and view controllers, leveraging their strengths in different parts of the application.