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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

Modifying the JournalEntry class

Currently, when you create a new journal entry using the Add New Journal Entry screen and click the Save button, the entry will appear on the Journal List screen:

Figure 23.1: Simulator showing new entries added to the Journal List screen

If you quit and restart your app, the newly added entries will disappear:

Figure 23.2: Simulator showing new entries disappear after the app is relaunched

This is because the contents of the journalEntries array are only kept in memory and not saved to device storage when the app is closed. To resolve this, you will implement SwiftData for your app. The first step in implementing SwiftData is to create model objects from your existing JournalEntry class, modifying this and other classes in your app as needed. Follow these steps:

  1. In the Project navigator, click the JournalEntry file (located in the Journal List Scene | Model group). Import the SwiftData framework and annotate the...

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