Book Image

iOS 12 Programming for Beginners - Third Edition

By : Craig Clayton
Book Image

iOS 12 Programming for Beginners - Third Edition

By: Craig Clayton

Overview of this book

Want to build iOS 12 applications from scratch with the latest Swift 4.2 language and Xcode 10 by your side? Forget sifting through tutorials and blog posts; this book is a direct route to iOS development, taking you through the basics and showing you how to put principles into practice. Take advantage of this developer-friendly guide and start building applications that may just take the App Store by storm! If you’re already an experienced programmer, you can jump right in and learn the latest iOS 12 features. For beginners, this book starts by introducing you to iOS development as you learn Xcode and Swift. You'll also study advanced iOS design topics, such as gestures and animations, to give your app the edge. You’ll explore the latest Swift 4.2 and iOS 12 developments by incorporating new features, such as the latest in notifications, custom-UI notifications, maps, and the recent additions in Sirikit. The book will guide you in using TestFlight to quickly get to grips with everything you need to get your project on the App Store. By the end of this book, you'll be ready to start building your own cool iOS applications confidently.
Table of Contents (27 chapters)
Free Chapter
1
Getting Familiar with Xcode

Arrays

Arrays are ordered collections of values and can hold any number of items, for example, a list of strings, ints, and floating-point values. 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 mixed data values.

Now, let's review the following diagram, which is a mixed array:

Since this example contains mixed data types, such as strings, ints, and bools, we would have to name this an array type of Any. This means that we can have mixed data types inside our array. Until you are genuinely comfortable with arrays, I would not recommend using mixed data arrays. Try to stick to arrays...