Mastering Xamarin.Forms - Second Edition

Updating the navigation service to handle ViewModel creation and dependency injection

Currently, in the TripLog app, each page is responsible for creating its own ViewModel instance. However, because we provide a ViewModel's dependencies through its constructor, we would have to manually resolve each dependency within the Page class and then pass them into the ViewModel instantiation. Not only is this going to be messy code, it is also difficult to maintain, and doesn't promote loose coupling. Since we have registered our ViewModels in our IoC container, we can completely remove the ViewModel instantiations from our Pages and set our navigation service up to handle resolving the ViewModels from the IoC container, automatically supplying their ...