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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 closures

A closure, like a function, contains a sequence of instructions and can take arguments and return values. However, closures don’t have names. The sequence of instructions in a closure is surrounded by curly braces ({ }), and the in keyword separates the arguments and return type from the closure body.

Closures can be assigned to a constant or variable, so they’re handy if you need to pass them around inside your program. For instance, let’s say you have an app that downloads a file from the internet, and you need to do something to the file once it has finished downloading. You can put a list of instructions to process the file inside a closure and have your program execute it once the file finishes downloading.

You’ll now write a closure that applies a calculation on each element of an...

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