One of the paramount features of the Xamarin.Forms toolkit is the layer of abstraction it provides over user interface implementation. With a single API, Xamarin.Forms allows you to use native user interface controls and functionality. For example, the Entry class at runtime will display a UITextField view on iOS, an EditText widget on Android, and a TextBox control on Windows. The toolkit does this using a concept called renderers. The renderers correspond with the visual elements—controls, pages, and layouts—within the API. So, for example, there is an EntryRenderer that is responsible for rendering instances of the Entry class down to the platform-specific versions of that control. The beauty of this renderer concept is that you can subclass the various renderer classes to override how a specific element is translated at runtime. So, for example...
Mastering Xamarin.Forms - Second Edition
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Mastering Xamarin.Forms - Second Edition
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Overview of this book
Discover how to extend and build upon the components of the Xamarin.Forms toolkit to develop effective, robust mobile app architecture. Starting with an app built with the basics of the Xamarin.Forms toolkit, we'll go step by step through several advanced topics to create a solution architecture rich with the benefits of good design patterns and best practices.
We'll start by introducing a core separation between the app's user interface and the app's business logic by applying the MVVM pattern and data-binding. Then we will focus on building out a layer of plugin-like services that handle platform-specific utilities such as navigation and geo-location, as well as how to loosely use these services in the app with inversion of control and dependency injection. Next we'll connect the app to a live web-based API and set up offline synchronization. Then, we'll dive into testing the app logic through unit tests. Finally, we will setup Visual Studio App Center to automate building, testing, distributing and monitoring the app.
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Current Title:
Mastering Xamarin.Forms - Second Edition
Table of Contents (11 chapters)
Preface
Free Chapter
Getting Started
MVVM and Data Binding
Navigation
Platform Specific Services and Dependency Injection
User Interface
API Data Access
Authentication
Testing
App Monitoring
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