在SwiftUI中根据不同情况创建按钮

import SwiftUI

struct ContentView: View {
    @State private var isLoggedIn = false

    var body: some View {
        VStack {
            if isLoggedIn {
                Button(action: {
                    print("Logout")
                }) {
                    Text("Logout")
                        .foregroundColor(.white)
                        .background(Color.blue)
                        .cornerRadius(10)
                }
            } else {
                Button(action: {
                    print("Login")
                }) {
                    Text("Login")
                        .foregroundColor(.black)
                        .background(Color.gray)
                        .cornerRadius(10)
                }
            }
        }
    }
}

struct ContentView_Previews: PreviewProvider {
    static var previews: some View {
        ContentView(isLoggedIn: .constant(true))
    }
}