SwiftUI -使用按钮和条件语句进行文本字段验证

import SwiftUI

struct ContentView: View {
    @State private var username: String = ""
    @State private var password: String = ""
    @State private var isLoginSuccess: Bool = false

    var body: some View {
        VStack {
            TextField("Username", text: $username)
                .textFieldStyle(RoundedBorderTextFieldStyle())
                .padding()

            SecureField("Password", text: $password)
                .textFieldStyle(RoundedBorderTextFieldStyle())
                .padding()

            Button(action: {
                // 进行文本字段验证
                if self.username == "admin" && self.password == "123456" {
                    self.isLoginSuccess = true
                } else {
                    self.isLoginSuccess = false
                }
            }) {
                Text("Login")
                    .foregroundColor(.white)
                    .padding()
                    .background(isLoginSuccess ? Color.green : Color.blue)
                    .cornerRadius(10)
            }
            .padding()

            if isLoginSuccess {
                Text("Login Successful!")
                    .foregroundColor(.green)
                    .padding()
            }
        }
        .padding()
    }
}

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