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

Arrays


Arrays are an ordered collection of values and can hold any number of items. For example, a list of Strings, Ints, floating-point values, and so on. Arrays are stored in an ordered list, starting at 0. Let's look at a diagram:

Starting from left to right in the preceding examples, we first have an array that holds a collection of Strings. In the second example, we have another array that holds a collection of Ints. In our third example, we have an array that holds a collection of floating-point values.

Now, let's review the following diagram that looks like an array, but actually is not one:

Since this example contains mixed data types, such as Strings, Ints, and bools, it is not considered an array. If you enter this, you will receive an error message.

An array can hold any data type, but since an array is strongly typed, every element in it must be of the same type.

Creating an empty array

Let's now create a few arrays in Playgrounds.

Sometimes, you may want to remove your prior entries...