gistfile1.txt

import SwiftUI

struct SelectedButton: View {
   @State var tabButtons = tabs[0]
    
    var body: some View {
        VStack {
            ScrollView(.horizontal, showsIndicators: false) {
                ScrollViewReader { value in
                    HStack(spacing: 20) {
                        ForEach(tabs, id: \.self) { tab in
                                Button(action: {
                                    tabButtons = tab
                                    value.scrollTo(tab)
                                }, label: {
                                    Text(tab)
                                        .font(.title2)
                                        .foregroundColor(tabButtons == tab ? .black : .secondary)
                                        .background(
                                            ZStack {
                                                if tabButtons == tab {
                                                    Rectangle()
                                                        .frame(height: 5)
                                                        .offset(y: 25)
                                                        .foregroundColor(.green)
                                                }
                                            }
                                        )
                                })
                                .animation(.linear(duration: 0.2), value: tabButtons)
                        }
                    }
                    .padding()
                }
            }
            
            ZStack {
                Color.gray
                    .opacity(0.1)
                VStack {
                    Text("Hello")
                        .font(.largeTitle)
                }
                .frame(maxWidth: .infinity, maxHeight: .infinity)
            }
            .padding(.top, 5)
        }
    }
}

struct SelectedButton_Previews: PreviewProvider {
    static var previews: some View {
        SelectedButton()
    }
}

var tabs: [String] = ["Overview", "Orders", "Transactions", "News", "Contacts", "My Account"]