Book Image

iOS 10 Programming for Beginners

By : Craig Clayton
Book Image

iOS 10 Programming for Beginners

By: Craig Clayton

Overview of this book

You want to build iOS applications for iPhone and iPad—but where do you start? Forget sifting through tutorials and blog posts, this is a direct route into iOS development, taking you through the basics and showing you how to put the principles into practice. With every update, iOS has become more and more developer-friendly, so take advantage of it and begin building applications that might just take the App Store by storm! Whether you’re an experienced programmer or a complete novice, this book guides you through every facet of iOS development. From Xcode and Swift—the building blocks of modern Apple development—and Playgrounds for beginners, one of the most popular features of the iOS development experience, you’ll quickly gain a solid foundation to begin venturing deeper into your development journey. For the experienced programmer, jump right in and learn the latest iOS 10 features. You’ll also learn the core elements of iOS design, from tables to tab bars, as well as more advanced topics such as gestures and animations that can give your app the edge. Find out how to manage databases, as well as integrating standard elements such as photos, GPS into your app. With further guidance on beta testing with TestFlight, you’ll quickly learn everything you need to get your project on the App Store!
Table of Contents (26 chapters)
iOS 10 Programming for Beginners
Credits
About the Author
About the Reviewer
www.PacktPub.com
Customer Feedback
Preface
Free Chapter
1
Getting Familiar with Xcode
Index

Sets


A set stores unique values of the same type in a collection without a defined order. Let's look at a diagram:

In the above diagram, we have two circles, both of which represent a set. On the left, we have Craig's favorite movies; and, on the right, we have Gabe's favorite movies.

Creating an empty set

Before we create these sets, let's just create an empty set and see what that looks like:

let movieSet = Set<String>()

In this first set, after the equals sign, we create the set and give it a data type of String. Then, we use the parentheses to initialize the set.

Creating a set with an array literal

Our first set was an empty String set, but we can create a set using an array literal. Let's add the following into Playgrounds:

let numberSet = Set<Int>([])

This above immutable set has a data type of Int; but, in the parentheses, we pass an empty array literal when we used the brackets.

Creating a mutable set

Now that we are familiar with the way sets are created, let's create a mutable...