使样式为.bordered的SwiftUI按钮扩展为全宽

import SwiftUI

struct ContentView: View {
    var body: some View {
        GeometryReader { geometry in
            VStack {
                Button(action: {
                    print("Button tapped!")
                }) {
                    Text("Submit")
                        .font(.headline)
                        .foregroundColor(.white)
                        .padding()
                        .background(Color.blue)
                        .cornerRadius(8)
                        .overlay(
                            RoundedRectangle(cornerRadius: 8)
                                .stroke(Color.black, lineWidth: 1)
                                .opacity(0.5)
                        )
                }
                .frame(width: geometry.size.width) // 设置按钮宽度为全宽
                .buttonStyle(BorderedProminentButtonStyle())
            }
        }
    }
}

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