SwiftUI 3按钮-一次只能切换一个按钮

import SwiftUI

struct ContentView: View {
    @State private var selectedButton: Int = 0
    
    var body: some View {
        VStack {
            Button(action: {
                self.selectedButton = 0
            }) {
                Text("Button 1")
                    .padding()
                    .background(selectedButton == 0 ? Color.blue : Color.gray)
                    .foregroundColor(.white)
                    .cornerRadius(10)
            }
            
            Button(action: {
                self.selectedButton = 1
            }) {
                Text("Button 2")
                    .padding()
                    .background(selectedButton == 1 ? Color.blue : Color.gray)
                    .foregroundColor(.white)
                    .cornerRadius(10)
            }
            
            Button(action: {
                self.selectedButton = 2
            }) {
                Text("Button 3")
                    .padding()
                    .background(selectedButton == 2 ? Color.blue : Color.gray)
                    .foregroundColor(.white)
                    .cornerRadius(10)
            }
        }
    }
}

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