传递给在SwiftUI中不带任何参数的调用的参数

import SwiftUI

struct ContentView: View {
    @State private var message = "Hello, World!"
    
    var body: some View {
        VStack {
            Text(message)
                .font(.largeTitle)
            
            Button(action: {
                self.message = "Button tapped!"
            }) {
                Text("Tap me!")
                    .font(.title)
                    .padding()
                    .background(Color.blue)
                    .foregroundColor(.white)
                    .cornerRadius(10)
            }
        }
    }
}

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