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

Functions


Now, it is time to get into a really fun part of programming and learn how to write functions. Functions are self-contained pieces of code that you want to run on something. In Swift 3, Apple has made a change to how you should write functions. All of the functions we will write in this chapter will perform an action (think of verbs). Let's create a simple function called greet():

func greet() {
  print("Hello")
}

This example is a basic function with a print statement in it. In programming, functions do not actually run until you call them. We call a function simply by calling its name. So, let's call greet:

greet()

That's it! We just created our first function and called it, but functions can do so much more. We can add what is called a parameter to a function. A parameter allows us to accept data types inside of our parentheses. By doing this, it allows us to build more reusable chunks of code. So, let's update our greet() function to accept a parameter called name:

func greet(name...