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

Creating a class or structure


We use the same syntax to define classes and structures. The only difference is that we define a class using the class keyword and a structure using the struct keyword. Let's look at the syntax used to create both classes and structures:

class MyClass { 
  // MyClass definition 
} 
 
struct MyStruct { 
  // MyStruct definition 
} 

In the preceding code, we define a new class named MyClass and a new structure named MyStruct. This effectively creates two new Swift types named MyClass and MyStruct. When we name a new type, we want to use the standard naming convention set by Swift, where the name is in camel case with the first letter being uppercase. Any method or property defined within the class or structure should also be named using camel case with the first letter being lowercase.

Empty classes and structures are not that useful, so let's look at how we can add properties to our classes and structures.

Properties

Properties...