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Xamarin.Forms Projects

You're reading from   Xamarin.Forms Projects Build multiplatform mobile apps and a game from scratch using C# and Visual Studio 2019

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Product type Paperback
Published in Jun 2020
Publisher Packt
ISBN-13 9781839210051
Length 504 pages
Edition 2nd Edition
Languages
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Authors (2):
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 Hindrikes Hindrikes
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Hindrikes
 Karlsson Karlsson
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Karlsson
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Table of Contents (13) Chapters Close

Preface 1. Introduction to Xamarin 2. Building Our First Xamarin.Forms App FREE CHAPTER 3. Building a News App Using Xamarin.Forms Shell 4. A Matchmaking App with a Rich UX Using Animations 5. Building a Photo Gallery App Using CollectionView and CarouselView 6. Building a Location Tracking App Using GPS and Maps 7. Building a Weather App for Multiple Form Factors 8. Setting Up a Backend for a Chat App Using Azure Services 9. Building a Real-Time Chat Application 10. Creating an Augmented Reality Game 11. Hot Dog or Not Hot Dog Using Machine Learning 12. Other Books You May Enjoy

Subscribing to location updates

Now that we have prepared the info.plist file for location tracking, it is time to write the actual code that will track the location of the user. If we don't set CLLocationManager so that it doesn't pause location updates, location updates can be paused automatically by iOS when the location data is unlikely to change. In this app, we don't want that to happen because we want to save the location multiple times so that we can establish whether a user visits a particular location frequently. Let's set this up: 

  1. In the MeTracker.iOS project, open LocationTrackingService.
  2. Add a private field for CLLocationManager.
  3. Create an instance of CLLocationMananger in the StartTracking method.
  4. Set PausesLocationUpdatesAutomatically to false.
  5. Set AllowBackgroundLocationUpdates to true (as shown in the following code) so that the location updates will continue, even when the app is running in...
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