Summary of Clean iOS Architecture pt.5: MVC, MVVM, and MVP (UI Design Patterns)

00:00:00 - 00:15:00

The presenter covers the three main design patterns used for creating clean iOS architectures: Model-View-Controller (MVC), Model-View-Presenter (MVP), and Model-View-ViewModel (MVVM). He explains that all three patterns are specific to the user interface and should be used with care. Finally, he encourages viewers to leave questions on the comments section.

• 00:00:00 MVC, MVVM, and MVP are all UI design patterns, not architectures. Each pattern solves a specific problem, but all three are just different ways of implementing the same thing - a mechanism for communicating changes between components in a user interface.
• 00:05:00 The Clean iOS Architecture pattern recommends separating out different responsibilities into different layers, with the model layer handling business logic and data manipulation, the storage layer handling database interactions, the view layer handling user interface and formatting, and the controller layer handling event handling, routing, and rendering. However, there is no consensus on where these responsibilities should live, and as the application grows, it becomes messy and difficult to keep track of. MVVM attempts to solve this by having the view model not have a reference to the view, and the view and view model have no reference to each other.
• 00:10:00 Model-view-presenter (MVP) is a UI design pattern that recommends separating the business logic from the user interface. The presenter holds a reference to the view, but doesn't hold the view directly. The presenter talks to the model layer through interfaces and gets model events back through interfaces. The presenter will implement model layer interfaces and communicate with model layer protocols or interfaces as the presenter gets model layer notifications. You will create a vo data and pass it to the view protocol, which the view implements. The presenter can pass it forward and there are different ways of implementing the MVP.
• 00:15:00 In this video, the presenter covers the three main design patterns used for creating clean iOS architectures: Model-View-Controller (MVC), Model-View-Presenter (MVP), and Model-View-ViewModel (MVVM). He explains that all three patterns are specific to the user interface and should be used with care. Finally, he encourages viewers to leave questions on the comments section.