如何从类中将值设置为EnvironmentObject？

import SwiftUI
import Combine

class UserData: ObservableObject {
    @Published var username: String = ""
    @Published var isLoggedIn: Bool = false
}

struct ContentView: View {
    @EnvironmentObject var userData: UserData
    
    var body: some View {
        // 使用userData对象的属性和方法
    }
}

class SceneDelegate: UIResponder, UIWindowSceneDelegate {
    var window: UIWindow?
    let userData = UserData() // 创建环境对象

    func scene(_ scene: UIScene, willConnectTo session: UISceneSession, options connectionOptions: UIScene.ConnectionOptions) {
        // 将环境对象与视图关联
        let contentView = ContentView().environmentObject(userData)
        
        // 其他代码...
    }
    
    // 其他代码...
}