raywenderlich.com Weekly - Issue 186

186. Tutorials on HealthKit Tutorial With Swift, What's new in Swift 4.2, Test-Driven Development Tutorial for Android, A New Book Announcement (Push Notifications by Tutorials) and more!  Issue 186 - Sep 25, 2018 iOS [Saving Data in iOS]( by Catie & Jessy Catterwaul In our newest course for [raywenderlich.com subscribers](, you'll find out where and how to save data in iOS. In this course, you'll learn how to work with Foundation methods, JSON, Codable, and Property Lists, all from within Xcode Playgrounds. [HealthKit Tutorial With Swift: Workouts]( by Felipe Laso-Marsetti This tutorial shows you how to track workouts using the HealthKit APIs by integrating an app with the system’s Health app. [Getting Started with Core Data Tutorial]( by Pietro Rea Want to get started with Core Data? Start here, and learn the basics of building the data layer of your iOS app. [Lightweight Migrations in Core Data Tutorial]( by Aaron Douglas What should you do if you need to change your Core Data model after you ship your app? In this tutorial, you'll learn one solution: lightweight migrations. Lightweight migrations helps you automatically migrate your data from one version of the data model to the current data model. [Multiple Managed Object Contexts with Core Data Tutorial]( by Matthew Morey Learn how to use multiple managed object contexts to improve the performance of your apps in this abridged chapter from our book [Core Data by Tutorials!](  Sponsored Link [On-device Speech Recognition with KeenASR SDK]( Interested in providing on-device speech recognition capabilities in your iOS and Android apps? KeenASR SDK performs all the processing on-device (offline), it's COPPA/HIPPA compliant, and it can be customized for specific domains (command&control, medical notes, construction notes, etc.). Objective C, Swift, Java, Unity plugin. [Sponsor raywenderlich.com Weekly and reach over 60,000 subscribers!](  Swift [What's new in Swift 4.2 - New Sequence Methods]( by Josh Steele Swift 4.2 refined some of the syntax dealing with finding the first instance of an item in a collection, as well as some new ones to find the last instance. Learn all about it in this screencast for [raywenderlich.com subscribers](.  Android [Test-Driven Development Tutorial for Android: Getting Started]( by Victoria Gonda Learn the basics of test-driven development, or TDD, and discover how to use TDD effectively when developing your Android apps!  Books [Introducing Push Notifications by Tutorials]( by Chris Belanger We’re excited to launch one of our brand new books this season: Push Notifications by Tutorials! This book will teach you everything you need to know about leveraging push notifications in your apps. Push notifications may seem simple and straightforward at first since almost everyone is familiar with them; however, knowing how and when to use them in practice can prove challenging. [Core Data by Tutorials Updated for Swift 4.2 and iOS 12]( by Chris Belanger We’re excited to announce that Core Data by Tutorials, Fifth Edition has been fully updated for Swift 4.2, iOS 12 and Xcode 10. Core Data by Tutorials teaches you everything you need to know to take control of your data in iOS apps using Core Data, Apple’s powerful object graph and persistence framework.  Where To Go From Here? [Takehome iOS Interviews: Rickroll Style]( by Derek Selander What happens if you mix a take home iOS interview with a Rickroll? :] [Twitter]( [Facebook]( [Website]( To make sure you keep getting these emails, please add ray@raywenderlich.com to your address book or whitelist us. Want out of the loop? [Unsubscribe](. Our postal address: 1882 Hawksbill Road | McGaheysville VA 22840