swiftui_bindings_state.swift

public struct FlipView: View
{
    /// ¿Mostramos el resultado?
    @State private var showResults: Bool = false
    
    public var body: some View
    {
        ZStack
        {
            Side(text: "Question?")
                .background(Color.yellow)
                .rotation3DEffect(.degrees(self.showResults ? 180.0 : 0.0), axis: (x: 0.0, y: 1.0, z: 0.0))
                .zIndex(self.showResults ? 0 : 1)
                .frame(width: 300, alignment: .center)
            
            Side(text: "Answer!")
                .background(Color.yellow)
                .rotation3DEffect(.degrees(self.showResults ? 0.0 : 180.0), axis: (x: 0.0, y: -1.0, z: 0.0))
                .zIndex($showResults ? 1 : 0)
                .frame(width: 300, alignment: .center)
        }
        .tapAction(self.handleFlipViewTap)
    }
    
    // MARK: - Actions -
    
    private func handleFlipViewTap() -> Void
    {
        withAnimation(.basic(duration: 0.25, curve: .easeOut))
        {
            self.showResults.toggle()
        }
    }
}