i OS 12 App Development Essentials, the latest edition of this popular book series, has now been fully updated for the i OS 12 SDK, Xcode 10 and the Swift 4.2 programming language.This publication is available for purchase in print and e Book editions. The print edition consists of 102 chapters and includes a free download of the color PDF of the book with 20 additional chapters. The e Book edition contains all 122 chapters.Beginning with the basics, this book provides an outline of the steps necessary to set up an i OS development environment. An introduction to the architecture of i OS 12 and programming in Swift 4 is provided, followed by an in-depth look at the design of i OS applications and user interfaces.More advanced topics such as file handling, database management, graphics drawing and animation are also covered, as are touch screen handling, gesture recognition, multitasking, location management, local notifications, camera access and video playback support. Other features are also covered including Auto Layout, local map search, user interface animation using UIKit dynamics, Siri integration, i Message app development, Cloud Kit sharing and biometric authentication.Additional features of i OS development using Xcode are also covered, including Swift playgrounds, universal user interface design using size classes, app extensions, Interface Builder Live Views, embedded frameworks, collection and stack layouts and Cloud Kit data storage in addition to drag and drop integration and the document browser.The key new features of i OS 12 and Xcode 10 are also covered in detail, including Siri shortcuts and the new i OS machine learning features The aim of this book, therefore, is to teach you the skills necessary to build your own apps for i OS 12. Assuming you are ready to download the i OS 12 SDK and Xcode 10, have an Intel-based Mac and ideas for some apps to develop, you are ready to get started.