Problem Statement
Compare MVC, MVVM and VIPER architectures in Swift iOS applications: describe key differences, pros, cons and when you’d prefer each.
Explanation
MVC is simple and easy to understand: Controllers mediate between UI and data. Its chief disadvantage in iOS is that ViewControllers often become 'massive view controllers'. /n/n MVVM improves separation: ViewModels handle logic and provide data to Views, improving testability; however you may need binding or reactive frameworks. /n/n VIPER pushes layering further: you have View, Interactor, Presenter, Entity, Router; this maximises modularity and testability but introduces more boilerplate. /n/n You may prefer MVC for simple apps or prototypes, MVVM for moderate complexity apps with test requirements, and VIPER or Clean Architecture for large, scalable enterprise apps with many modules and teams.
Practice Sets
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