MVC (Model-View-Controller) and MVVM (Model-View-ViewModel) are both software architectural design patterns used to separate the logic, data, and interface of an application for easier maintenance and scalability. Below, I will explain their core concepts in detail.
1. MVC (Model-View-Controller):#
- Model: Responsible for handling the data and business logic of the application. It is independent of the view and controller, focusing only on data storage and processing.
- View: Responsible for displaying data, i.e., the user interface. The view retrieves data from the model and presents it to the user, but does not directly manipulate the data.
- Controller: Responsible for receiving user input, handling user requests, and updating the model and view. The controller acts as a coordinator between the model and view.
2. MVVM (Model-View-ViewModel):#
- Model: Same as the model in MVC, responsible for handling the data and business logic of the application.
- View: Same as the view in MVC, responsible for displaying data, i.e., the user interface.
- ViewModel: Acts as a bridge between the view and model. It contains the data and commands required by the view, abstracting the view's state and behavior into bindable properties and commands. This allows the view to interact directly with the ViewModel through data binding, without relying on the controller.
The core difference between MVC and MVVM lies in their controllers and view models. In MVC, the controller is responsible for coordinating the model and view, while in MVVM, the view model interacts directly with the view through data binding, achieving better decoupling. MVVM is often used in conjunction with two-way data binding techniques to achieve automatic synchronization between the view and view model. This provides higher maintainability and scalability in certain scenarios, such as complex user interfaces and front-end applications.