iOS has provided search functionality via Spotlight for many years, but it has always been restricted to content within system apps, and on the web. Well, this all changes with the introduction of Core Spotlight and the search APIs of iOS 9. This short tutorial series will give you an introduction into adding search functionality to your apps – both through user activities and the more advanced Core Spotlight indexing patterns. It’ll also cover how you can structure your app to load the appropriate data really quickly when a user chooses a search result.
This is a companion discussion topic for the original entry at https://www.raywenderlich.com/3357-introducing-ios-9-search-apis