Book Image

Mastering Xamarin UI Development - Second Edition

By : Steven F. Daniel
Book Image

Mastering Xamarin UI Development - Second Edition

By: Steven F. Daniel

Overview of this book

This book will provide you with the knowledge and practical skills that are required to develop real-world Xamarin and Xamarin.Forms applications. You’ll learn how to create native Android app that will interact with the device camera and photo gallery, and then create a native iOS sliding tiles game. You will learn how to implement complex UI layouts and create customizable control elements based on the platform, using XAML and C# 7 code to interact with control elements within your XAML ContentPages. You’ll learn how to add location-based features by to your apps by creating a LocationService class and using the Xam.Plugin.Geolocator cross-platform library, that will be used to obtain the current device location. Next, you’ll learn how to work with and implement animations and visual effects within your UI using the PlatformEffects API, using C# code. At the end of this book, you’ll learn how to integrate Microsoft Azure App Services and use the Twitter APIs within your app. You will work with the Razor Templating Engine to build a book library HTML5 solution that will use a SQLite.net library to store, update, retrieve, and delete information within a local SQLite database. Finally, you will learn how to write unit tests using the NUnit and UITest frameworks.
Table of Contents (15 chapters)

Updating the App.xaml class to use the navigation service

Now that we have successfully updated each of our ViewModels and ContentPages to take advantage of our NavigationService so that our ViewModels will be able to navigate to each ViewModel and ContentPage within the navigation stack, the next step is to make some additional changes within our OnStart method. We do this in order to declare a NavService property that will be used to navigate between each of our ViewModels, as well as create an instance of our navigation service class.

Finally, we will see how to register each of our ViewModels and ContentPages on our navigation stack and check to see what Target OS Platform we are running on so that we can call the appropriate NavigationPage.

Let's take a look at how we can achieve this by following these steps:

  1. Open the App.xaml.cs file, ensuring that it is displayed...