In order to follow and code along with this book, you will need to own an Apple Mac that is capable of running macOS Catalina or later.

All the sample code examples have been tested on macOS Catalina 10.15.1, running Xcode 11.3. An understanding of the Swift programming language would be advantageous but is not essential.

In order to get the latest version of macOS Catalina, or to see whether your hardware supports it, please visit https://support.apple.com/en-us/HT210222.

To obtain the latest version of Xcode, please visit the Mac App Store and search for Xcode or visit the store at https://apps.apple.com/us/app/xcode/id497799835.

If you are new to iOS and macOS development and want to learn more about the Swift programming language, either prior to or after reading this book, I highly recommend Mastering Swift 5 from Packt.

You can download the example code files for this book from your account at www.packt.com. If you purchased this book elsewhere, you can visit www.packtpub.com/support and register to have the files emailed directly to you.

You can download the code files by following these steps:

1. Log in or register at www.packt.com.
2. Select the Support tab.
3. Click on Code Downloads.
4. Enter the name of the book in the Search box and follow the onscreen instructions.

Once the file is downloaded, please make sure that you unzip or extract the folder using the latest version of:

• WinRAR/7-Zip for Windows
• Zipeg/iZip/UnRarX for Mac
• 7-Zip/PeaZip for Linux

The code bundle for the book is also hosted on GitHub at https://github.com/PacktPublishing/Learn-SwiftUI. In case there's an update to the code, it will be updated on the existing GitHub repository.

We also have other code bundles from our rich catalog of books and videos available at https://github.com/PacktPublishing/. Check them out!

There are a number of text conventions used throughout this book.

CodeInText: Indicates code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles. Here is an example: "Let's start by creating an instance of TableView in an empty ViewController."

A block of code is set as follows:

func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int 
    
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell 

When we wish to draw your attention to a particular part of a code block, the relevant lines or items are set in bold:

class ViewController: UIViewController {

    var tableView: UITableView!
    
    override func viewDidLoad() {

        tableView = UITableView(frame: view.frame)
        view.addSubview(tableView)
        
    }

}

Bold: Indicates a new term, an important word, or words that you see onscreen. For example, words in menus or dialog boxes appear in the text like this. Here is an example: "Select SwiftUI View from the User Interface options and then click Next."