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iOS 17 Programming for Beginners

iOS 17 Programming for Beginners

By : Ian Lockett, Ahmad Sahar
4.6 (21)
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iOS 17 Programming for Beginners

iOS 17 Programming for Beginners

4.6 (21)
By: Ian Lockett, Ahmad Sahar

Overview of this book

In a world with nearly 2 million apps on the App Store, the demand for skilled iOS developers has never been higher. "iOS 17 Programming for Beginners, Eighth Edition" is your gateway to this lucrative and dynamic field. This hands-on guide is tailored for those who are new to iOS and takes you on a journey from learning the Swift language to crafting your own app and seeing it thrive on the App Store. Our approach is hands-on and practical. Each chapter is designed to be a stepping stone in your development journey, providing step-by-step tutorials, real-life examples, and clear explanations of complex concepts. As you progress, you'll not only be skilled in Swift but also incorporate cutting-edge technologies into your apps. You'll learn how to publish your creations and harness the power of iOS 17 through a straightforward and easy to program example app divided into manageable parts. By the time you've completed this book, you'll possess the skills and knowledge to not only develop and publish captivating apps but also leverage online resources to continually enhance your app development prowess.
Table of Contents (34 chapters)
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1
Part 1: Swift
11
Part 2: Design
16
Part 3: Code
26
Part 4: Features
32
Other Books You May Enjoy
33
Index

Exploring constants and variables

Now that you know about the simple data types that Swift supports, let's look at how to store them so that you can perform operations on them later.You can use constants or variables to store values. Both are containers that have a name, but a constant's value can only be set once and cannot be changed after they are set, whereas a variable's value can be changed at any time.You must declare constants and variables before you use them. Constants are declared with the let keyword while variables are declared with the var keyword.Let's explore how constants and variables work by implementing them in your playground. Follow these steps:

  1. Add the following code to your playground to declare three constants:
let theAnswerToTheUltimateQuestion = 42 
let pi = 3.14159
let myName = "Ahmad Sahar"
  1. Click the Run button on the last line to run it. In each case, a container is created and named, and the assigned value is stored in...

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