In the previous examples, you can easily see that Xamarin.Forms greatly simplifies the process of creating UI mobile applications on two complete different platforms using the same declarative view tree, even though the native approaches on these platforms are, in fact, almost completely different.
From a UI renderer perspective, Xamarin.Forms provides the native rendering with two different ways of using the same toolset at compile-time (compiled XAMLs) and at runtime (runtime rendering). In both scenarios, page-layout-view hierarchies that are declared in XAML layouts are rendered using renderers. Renderers can be described as the implementations of the view abstractions on target platforms. For instance, the renderer for the label element on iOS is responsible for translating label control (as well as its layout attributes) into a UILabel control.
Nevertheless, Xamarin.Forms can't just be categorized as a UI framework, since it provides various modules out of the box which...