如何在SwiftUI中从减去的子视图中删除视图

import SwiftUI

struct ContentView: View {
    @State private var showSubview = true
    
    var body: some View {
        VStack {
            Button(action: {
                self.showSubview.toggle()
            }) {
                Text("Toggle Subview")
            }
            
            if showSubview {
                Subview()
            }
        }
    }
}

struct Subview: View {
    var body: some View {
        Text("Subview")
            .font(.largeTitle)
            .foregroundColor(.blue)
    }
}