Adding SwiftUI to an existing app

In this recipe, we will learn how to navigate from a UIKit view to a SwiftUI view while passing a secret text to our SwiftUI view.

We'll be making use a UIKit storyboard, a visual representation of the UI in UIKit. The Main.storyboard file is to UIKit what the ContentView.swift file is to SwiftUI. They are both the default home views that are created when you start a new project.

We start off this project with simple UIKit project that contains a button.

Getting ready

Get the following ready before starting out with this recipe:

1. Clone or download the code for this book from GitHub: https://github.com/PacktPublishing/SwiftUI-Cookbook-2nd-Edition-/tree/main/Chapter01-Using-the-basic-SwiftUI-Views-and-Controls/10-Adding-SwiftUI-to-UIKit.
2. Open the StartingPoint folder and double-click on AddSwiftUIToUIKit.xcodeproj to open the project in Xcode.

How to do it…

We will add a NavigationController to the UIKit ViewController...