Book Image

iOS Programming Cookbook

Book Image

iOS Programming Cookbook

Overview of this book

Do you want to understand all the facets of iOS programming and build complex iOS apps? Then you have come to the right place. This problem-solution guide will help you to eliminate expensive learning curves and focus on specific issues to make you proficient at tasks and the speed-up time involved. Beginning with some advanced UI components such as Stack Views and UICollectionView, you will gradually move on to building an interface efficiently. You will work through adding gesture recognizer and touch elements on table cells for custom actions. You will work with the Photos framework to access and manipulate photos. You will then prepare your app for multitasking and write responsive and highly efficient apps. Next, you will integrate maps and core location services while making your app more secure through various encryption methods. Finally, you will dive deep into the advanced techniques of implementing notifications while working with memory management and optimizing the performance of your apps. By the end of the book, you will master most of the latest iOS 10 frameworks.
Table of Contents (22 chapters)
iOS Programming Cookbook
Credits
About the Author
About the Reviewer
www.PacktPub.com
Customer Feedback
Preface

App indexing using NSUserActivity


The first technology of indexing for app indexing is working with NSUserActivity. This class helps you to index items when users perform activities in your app, such as opening specific screens or interacting with app content. Using this activity class will help a user to find the information that they need in search results and will improve your app's ranking. NSUserActivity is not intended to index an app's arbitrary data; it only indexes the user's activities. If you want to index app-specific data, you will need to use Core Spotlight APIs and that's what we will do in the next section:

In the following demo, we will build a simple wallet app where a user can track their expenses by entering the item name and price. Once the user enters a new item in the wallet, we will create a user activity so that the system can index it in the private index.

Getting ready

There are two types of indexing in iOS and they're related to user privacy. Both indexes store...