如何在SwiftUI中弹出ScrollView中的卡片以居中

import SwiftUI

struct ContentView: View {
    @State private var isShowingCard = false
    
    var body: some View {
        Button(action: {
            isShowingCard = true
        }) {
            Text("弹出卡片")
                .padding()
                .background(Color.blue)
                .foregroundColor(.white)
                .cornerRadius(10)
        }
        .sheet(isPresented: $isShowingCard) {
            CardView()
        }
    }
}

struct CardView: View {
    var body: some View {
        ScrollView {
            VStack {
                ForEach(1...10, id: \.self) { index in
                    Text("卡片 \(index)")
                        .font(.title)
                        .padding()
                        .background(Color.gray)
                        .cornerRadius(10)
                        .padding(.vertical, 10)
                }
            }
            .padding()
        }
        .frame(maxWidth: .infinity, maxHeight: .infinity)
        .background(Color.white)
        .edgesIgnoringSafeArea(.all)
    }
}

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