Book Image

iOS 15 Programming for Beginners - Sixth Edition

By : Ahmad Sahar, Craig Clayton
5 (1)
Book Image

iOS 15 Programming for Beginners - Sixth Edition

5 (1)
By: Ahmad Sahar, Craig Clayton

Overview of this book

With almost 2 million apps on the App Store, iOS mobile apps continue to be incredibly popular. Anyone can reach millions of customers around the world by publishing their apps on the App Store. iOS 15 Programming for Beginners is a comprehensive introduction for those who are new to iOS. It covers the entire process of learning the Swift language, writing your own app, and publishing it on the App Store. Complete with hands-on tutorials, projects, and self-assessment questions, this easy-to-follow guide will help you get well-versed with the Swift language to build your apps and introduce exciting new technologies that you can incorporate into your apps. You'll learn how to publish iOS apps and work with Mac Catalyst, SharePlay, SwiftUI, Swift concurrency, and much more. By the end of this iOS development book, you'll have the knowledge and skills to write and publish interesting apps, and more importantly, to use the online resources available to enhance your app development journey.
Table of Contents (32 chapters)
1
Part 1: Swift
10
Part 2: Design
15
Part 3: Code
25
Part 4: Features

Passing data to the RestaurantDetailViewController instance

You have added and connected the outlets for the Restaurant Detail screen inside the RestaurantDetailViewController class. You've also added code to this class to get restaurant data from a RestaurantItem instance and use it to populate its outlets. The last thing you need to do is pass the selected RestaurantItem instance from the RestaurantListViewController instance to the RestaurantDetailViewController instance. Follow these steps:

  1. Click the RestaurantListViewController file in the Project navigator.
  2. Add the following code after viewDidLoad(): to call a showRestaurantDetail(segue:) method if the segue identifier is showDetail:
    override func prepare(for segue: UIStoryboardSegue, 
    sender: Any?) {
       if let identifier = segue.identifier {
          switch identifier {
          case Segue.showDetail.rawValue:
         ...