import SwiftUI

struct SwapperView: TabContent {
    static var title = "Swap"
    static var image = "rectangle.2.swap"
    
    
    @State var sw = Swapper(a: "Apfel", b: "Banana")
    @State var a = "Apfel"
    @State var b = "Banane"
    
    
    func tausche(){
        let tmp = a
        a = b
        b = tmp
    }
     
    var body: some View {
        VStack {
            Text("Vorher \(a) <-> \(b)")

            Button("Show Alert") {
                print("Hello, World!")
                tausche()
                sw.tausche()
            }
            Text("Swapping \(sw.a) <-> \(sw.b)")
            
        }
    }
}

struct Swapper<T> {
    var a: T
    var b: T
    
    
   mutating func tausche(){
        let tmp = a
        a = b
        b = tmp
    }
}
#Preview {
    SwapperView()
}