• Updated for Xamarin.Forms 4
• Packed with real-world scenarios and solutions to help you build professional grade mobile apps with Xamarin.Forms
• Includes design patterns and best practice techniques that every mobile developer should know

Discover how to extend and build upon the components of the most recent version of Xamarin.Forms to develop an effective, robust mobile app architecture. This new edition features Xamarin.Forms 4 updates, including CollectionView and RefreshView, new coverage of client-side validation, and updates on how to implement user authentication.

Mastering Xamarin.Forms, Third Edition is one of the few Xamarin books structured around the development of a simple app from start to finish, beginning with a basic Xamarin.Forms app and going step by step through several advanced topics to create a solution architecture rich with the benefits of good design patterns and best practices.

This book introduces a core separation between the app's user interface and the app's business logic by applying the MVVM pattern and data binding, and then focuses on building 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. You’ll connect the app to a live web-based API and set up offline synchronization before testing the app logic through unit testing. Finally, you will learn how to add monitoring to your Xamarin.Forms projects to track crashes and analytics and gain a proactive edge on quality.

• Find out how, when, and why to use architecture patterns and best practices with Xamarin.Forms
• Implement the Model-View-ViewModel (MVVM) pattern and data binding in Xamarin.Forms mobile apps
• Incorporate client-side validation in Xamarin.Forms mobile apps
• Extend the Xamarin.Forms navigation API with a custom ViewModel-centric navigation service
• Leverage the inversion of control and dependency injection patterns in Xamarin.Forms mobile apps
• Work with online and offline data in Xamarin.Forms mobile apps
• Use platform-specific APIs to build rich custom user interfaces in Xamarin.Forms mobile apps
• Explore how to monitor mobile app quality using Visual Studio App Center

This book is intended for .NET developers who are familiar with Xamarin mobile application development and the open source Xamarin.Forms toolkit. If you have already started working with Xamarin.Forms and want to take your app to the next level, making it more maintainable, testable and flexible, then this book is for you.