Your First iOS & SwiftUI App: Polishing the App, Episode 28: Display a Custom Alert | Kodeco

[catie]

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This is a companion discussion topic for the original entry at https://www.kodeco.com/38052670-your-first-ios-swiftui-app-polishing-the-app/lessons/28

[nicolomonili]

I should have noticed this problem before, but not having created a separate “TextViews” file (on the video “SwiftUI Views and View Modifiers” > “Extract View”) i only noticed it in this video.

Using Xcode 15.3 something has definitely changed in the code used to show the preview of a struct in the canvas.

struct TextViews_Previews: PreviewProvider {
     static var previews: some View {
          TextViews()
     }
}

Now it’s only:

#Preview {
     TextViews()
}

So now trying to add the variables to pass to the PointsView() generates errors

[nicolomonili]

Ok, this seems to work, is it correct to proceed this way?

#Preview {
    
    let alertIsVisible = Binding.constant(true)
    let sliderValue = Binding.constant(50.0)
    let game = Binding.constant(Game())
    
    return PointsView(alertIsVisible: alertIsVisible, sliderValue: sliderValue, game: game)
    
}

Thank you