What you’ll learn
- Implement the MVVM Software pattern
- Binding
- Api consumption
- New development techniques
This course includes:
- 22 hours on-demand video
- 6 articles
- 7 downloadable resources
- Access on mobile and TV
- Full lifetime access
- Certificate of completion
Description
The Xamarin.Forms developer experience usually involves creating a user interface in XAML and then adding underlying code that operates on the user interface. As applications change and grow in size and scope, complex maintenance problems can arise. These problems include the tight coupling between user interface controls and business logic, increasing the cost of making modifications to the user interface and the difficulty of performing unit tests of that code.
The Model-View-ViewModel (MVVM) pattern helps to clearly separate the business and presentation logic of an application from its user interface (UI). Maintaining a clear separation between application logic and user interface helps address many development issues and can make an application easier to test, maintain, and evolve. It can also greatly improve code reuse opportunities and enables UI developers and designers to collaborate more easily by developing their respective parts of an application.
The benefits of using the MVVM pattern are as follows:
- If there is an existing model implementation that encapsulates existing business logic, it can be difficult or risky to change it. In this scenario, the view model acts as an adapter for the model classes and allows you to avoid making major changes to the model code.
- Developers can create unit tests for the view model and model, without using the view. Unit tests for the view model can exercise exactly the same functionality that the view uses.
- The application user interface can be redesigned without touching the code, provided the view is fully implemented in XAML. Therefore, a new version of the view should work with the existing view model.
- Designers and developers can work independently and simultaneously on their components during the development process. Designers can focus on the view, while developers can work on the view model and model components.
The key to using MVVM effectively lies in understanding how to factor application code into the correct classes and understanding how classes interact. The following sections analyze the responsibilities of each of the classes in the MVVM pattern.
Who this course is for:
- Developments c #
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