当我们在文本和图像之间切换按钮内容时，如何停止SwiftUI更改固定填充？

import SwiftUI

struct ContentView: View {
    @State private var isTextShown = true

    var body: some View {
        VStack {
            if isTextShown {
                Text("Hello, SwiftUI!")
                    .padding()
            } else {
                Image(systemName: "swift")
                    .resizable()
                    .frame(width: 100, height: 100)
                    .padding()
            }

            Button(action: {
                self.isTextShown.toggle()
            }) {
                Text("Toggle")
                    .padding()
                    .background(Color.blue)
                    .foregroundColor(.white)
                    .cornerRadius(10)
            }
        }
    }
}

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