如何将SwiftUI视图动态添加到父视图中？

import SwiftUI

struct ContentView: View {
    @State private var showChildView = false
    
    var body: some View {
        VStack {
            Button(action: {
                self.showChildView.toggle()
            }) {
                Text("添加子视图")
            }
            
            if showChildView {
                ChildView()
            }
        }
    }
}

struct ChildView: View {
    var body: some View {
        Text("这是一个子视图")
            .font(.largeTitle)
            .foregroundColor(.blue)
    }
}