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Chris Biscardi

Your first SwiftUI Mac OS App

First we need to open XCode. I'm using the XCode 12 beta so yours may look a bit different.

XCode new Project dialog

Choose a name

Our application itself is mostly contained in the ContentView.swift file. This includes a PreviewProvider (kind of like a built-in storybook) as well as Text with the default padding.

ContentView.swift
swift
import SwiftUI
struct ContentView: View {
var body: some View {
Text("Hello, world!").padding()
}
}
struct ContentView_Previews: PreviewProvider {
static var previews: some View {
ContentView()
}
}

If we click resume on the preview pane, we see the preview show us our ContentView

Preview Provider

The container, MyFirstMacAppApp.swift, bootstraps our app with a Scene.

MyFirstMacAppApp.swift
swift
import SwiftUI
@main
struct MyFirstMacAppApp: App {
var body: some Scene {
WindowGroup {
ContentView()
}
}
}

After clicking the play button and running the application, we can see that we have a window with some text and padding.

hello world