Book Image

Mastering Swift 3

Book Image

Mastering Swift 3

Overview of this book

Swift is the definitive language of Apple development today. It’s a vital part of any iOS and OS X developer’s skillset, helping them to build the most impressive and popular apps on the App Store—the sort of apps that are essential to iPhone and iPad users every day. With version 3.0, the Swift team have added new features to improve the development experience—making it easier to get the results you want and customers expect. Inside, you’ll find the key features of Swift 3.0 and quickly learn how to use the newest updates to your development advantage. From Objective-C interoperability to ARC, to closures and concurrency, this advanced Swift guide will develop your expertise and make you more fluent in this vital programming language. We give you in-depth knowledge of some of the most sophisticated elements of Swift development including protocol extensions, error-handling, design patterns, and concurrency, and guide you on how to use and apply them in your own projects. You'll see how even the most challenging design patterns and programming techniques can be used to write cleaner code and to build more performant iOS and OS X applications. By the end of this book, you’ll have a handle on effective design patterns and techniques, which means you’ll soon be writing better iOS and OS X applications with a new level of sophistication and control.
Table of Contents (23 chapters)
Mastering Swift 3
Credits
About the Author
About the Reviewer
www.PacktPub.com
Preface
Free Chapter
1
Taking the First Steps with Swift
2
Learning About Variables, Constants, Strings, and Operators

Summary


As we saw in this chapter, Apple has made mix and match very easy and convenient to use. In order to access Swift classes from our Objective-C code, all we need to do is import the Xcode-generated header file that exposes the Swift classes. While we do not see this header file as part of our code, Xcode automatically creates it for mixed language projects. The name of this header file takes the format of {Project Name}-Swift.h, where {Project Name} is the name of our project.

It is also very easy to use Objective-C classes within our Swift code. To expose Objective-C classes to our Swift code, all we need to do is add the Objective-C header file to the Objective-C bridging header file. Xcode can create this bridging header file for us the first time we add an Objective-C file to a Swift project, or the first time we add a Swift file to an Objective-C project.

While Apple has said that the future of application development for iOS and OS X platforms is in Swift, mix and match can be...