Your Second iOS & SwiftUI App

Nov 4 2021 · Swift 5.5, iOS 15, Xcode 13

Part 2: Data Flow

13. Color Schemes

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In iOS, you can easily set a color for your app that will be applied to certain views, like button labels, to achieve a desired theme.

    self.init(systemName: symbolName)
  }
}

extension View {

}

extension View {
  var previewedInAllColorSchemes: some View {

  }
}

  var previewedInAllColorSchemes: some View {
    ColorScheme
  }

  var previewedInAllColorSchemes: some View {
    ForEach(<#T##data: _##_#>, id: <#T##KeyPath<_.Element, _>#>, content: <#T##(_.Element) -> _#>)
    ColorScheme
  }

    ForEach(
      ColorScheme.allCases, id: <#T##KeyPath<_.Element, _>#>, content: <#T##(_.Element) -> _#>)

  }

      ColorScheme.allCases, id: \.self,
      content: <#T##(_.Element) -> _#>)
  }

      ColorScheme.allCases, id: \.self,
      content: preferredColorScheme
    )

      Book.Image(title: "📖")
    }
    .previewedInAllColorSchemes
  }

  static var previews: some View {
    ContentView()
      .previewedInAllColorSchemes
  }

  static var previews: some View {
    DetailView(book: .init(), image: .constant(nil))
      .previewedInAllColorSchemes
  }