Book Image

Mastering Swift 2

By : Jon Hoffman
Book Image

Mastering Swift 2

By: Jon Hoffman

Overview of this book

<p><span id="description" class="sugar_field">At their Worldwide Developer’s conference (WWDC) in 2015, Apple announced Swift 2, a major update to the innovative programming language they first unveiled to the world the year before. Swift 2 features exciting enhancements to the original iteration of Swift, acting, as Apple put it themselves as “a successor to the C and Objective-C languages.” – This book demonstrates how to get the most from these new features, and gives you the skills and knowledge you need to develop dynamic iOS and OS X applications.<br /> </span></p> <p><span id="description" class="sugar_field">Learn how to harness the newest features of Swift 2 todevelop advanced applications on a wide range of platforms with this cutting-edge development guide. Exploring and demonstrating how to tackle advanced topics such as Objective-C interoperability, ARC, closures, and concurrency, you’ll develop your Swift expertise and become even more fluent in this vital and innovative language. With examples that demonstrate how to put the concepts into practice, and design patterns and best practices, you’ll be writing better iOS and OSX applications in with a new level of sophistication and control.</span></p>
Table of Contents (24 chapters)
Mastering Swift 2
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
Index

Creating a class or structure


We use the same syntax to define classes and structures. The only difference is we define a class using the class keyword, and a structure by 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 associate values with a class or a structure...