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A Playground for running SwiftUI tutorial code on macOS Mojave
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README.md Formatting Jun 12, 2019

README.md

SwiftUI Playground for macOS Mojave

Apple announced their new SwiftUI Framework at WWDC 2019.

While it requires macOS Catalina beta to be run natively, it can already be used in Swift Playgrounds on the current stable version, macOS Mojave.

This project provides a Playground version of Apple’s Building Lists and Navigation tutorial. Xcode 11 beta is required.

Implementation

A UIHostingController can be used in a Playground Live View like this:

PlaygroundPage.current.liveView = UIHostingController(rootView: PlaygroundRootView())

The given root view must be public, along with its init() and body:

public struct PlaygroundRootView: View {
    public init() {}
    
    public var body: some View {
        LandmarkList()
    }
}

From here on, standard SwiftUI Views can be used to build the interface.

Execution

Press the blue Play button next to the PlaygroundPage.current.liveView line or type ⇧⌘↵ to run the Playground. If, after the initial build, the preview is not responsive, just press the Play button again.

Navigation

Use View > Navigator > Show Project Navigator or ⌘1 to show the Playground’s source files and recources.

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