iOS | Swift | MVVM Architecture | Unit tests | UI tests | clean, readable and well-structured code | UI/UX principles
John Gossman, an architect from Microsoft is credited to have created the Model View-View Model
pattern in the year 2005. There are three main components of this model:
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Model is all about implementing the domain model of the application to include the data model, validation, and business logic. Instances of the Model objects are DTOs (data transfer objects), business objects, POCOs (Plain Old CLR Objects), proxy objects, generated entity, and repositories.
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View is all that the user can see, like the structure, the layout, and how everything comes up on screen. It is the app page within the application. View receives and sends out updates to only the View-Model, except the communications that take place between the Model and this part.
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View-Model is the chain between the Model and the View components. The logic behind View is handled by this component. The model classes are used by the View-Model to interact with Model. The View-Model then takes the Model data in the form that View can put to use.