如何在SwiftUI中添加页脚视图到列表？

import SwiftUI

struct ContentView: View {
    var body: some View {
        NavigationView {
            List {
                ForEach(0..<20, id: \.self) { index in
                    Text("Item \(index)")
                        .padding(.vertical, 8)
                }
            }
            .listStyle(InsetGroupedListStyle())
            .background(Color.white)
            .listFooter {
                FooterView()
            }
        }
        .navigationTitle("List with Footer")
    }
}

struct FooterView: View {
    var body: some View {
        VStack {
            Text("This is the footer")
                .foregroundColor(.gray)
                .font(.footnote)
                .padding(.horizontal, 16)
                .padding(.vertical, 8)
            Button(action: {
                print("Footer button tapped")
            }) {
                Text("Tap Me")
                    .foregroundColor(.white)
                    .padding(.horizontal, 16)
                    .padding(.vertical, 8)
                    .background(Color.blue)
                    .cornerRadius(8)
            }
        }
        .frame(maxWidth: .infinity)
        .background(Color(UIColor.systemGroupedBackground))
        .padding(.bottom, 16)
    }
}

struct ContentView_Previews: PreviewProvider {
    static var previews: some View {
        ContentView()
    }
}