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To start developing using SwiftUI, you need the following:

 Xcode version 11 or later

 A deployment target (Simulator or real device) of iOS 13 or later

 macOS Mojave (10.14) or later (Note that if you're running macOS Mojave, you won’t be able to use Live Preview and design canvas features; full features are available only in macOS Catalina (10.15) and later.)

To install Xcode, you can install it from the App Store on your Mac (see Figure 1-3).

Alternatively, if you have a paid Apple developer account (you need this if you want to make your apps available on the App Store, but this is not a requirement for trying out the examples in this book), head over to https://developer.apple.com, sign in, and download Xcode directly.

FIGURE 1-3: Installing Xcode from the Mac App Store.

For this book, our focus is on developing iOS applications for the iPhone. Developing iPad, watchOS, tvOS, and macOS applications using SwiftUI is beyond the scope of this book.