Book Image

Mastering iOS 12 Programming - Third Edition

By : Donny Wals
Book Image

Mastering iOS 12 Programming - Third Edition

By: Donny Wals

Overview of this book

The iOS development environment has significantly matured, and with Apple users spending more money in the App Store, there are plenty of development opportunities for professional iOS developers. However, the journey to mastering iOS development and the new features of iOS 12 is not straightforward. This book will help you make that transition smoothly and easily. With the help of Swift 4.2, you’ll not only learn how to program for iOS 12, but also how to write efficient, readable, and maintainable Swift code that maintains industry best practices. Mastering iOS 12 Programming will help you build real-world applications and reflect the real-world development flow. You will also find a mix of thorough background information and practical examples, teaching you how to start implementing your newly gained knowledge. By the end of this book, you will have got to grips with building iOS applications that harness advanced techniques and make best use of the latest and greatest features available in iOS 12.
Table of Contents (35 chapters)
Title Page
Copyright and Credits
Dedication
Packt Upsell
Contributors
Preface
Index

Subscribing to location changes


One way of subscribing to changes in a user's location has already been covered in the previous section of this chapter. When you call startUpdatingLocation() on a location manager, it will automatically subscribe to the user's location. This method of tracking a user's location is excellent if you need very detailed reporting on a user's location, but usually, you don't need this level of detail. More importantly, using this kind of location tracking for an extended period will drain the user's battery.

Luckily, there are better ways to listen to location changes. One way is to subscribe to locations that the user visits by calling startMonitoringVisits(). This method is used if you aren't interested in the user's detailed movement but only want to know whether the user spent an extended period in a particular area. This type of tracking of a user's location is perfect if you need a low-power way to track very rough location changes. This kind of tracking...