问iOS小部件不会第一次在主屏幕中读取UserDeafults值

EN

let appGroupId = "group.com.myAppGroupId"
Text(UserDefaults(suiteName: appGroupId)!.object(forKey: "githubId") as? String ?? "??")

extension UserDefaults {
    enum Key: String {
        case githubId
    }
  
    static let shared: UserDefaults = {
        let appGroupId = "group.com.myAppGroupId"
        return UserDefaults(suiteName: appGroupId)!
    }()

    @UserDefault(key: .githubId)
    static var githubId: String?
}

@propertyWrapper
struct UserDefault<Value> {
    let key: String
    let defaultValue: Value
    var container: UserDefaults = .shared
    private let publisher = PassthroughSubject<Value, Never>()
    
    var wrappedValue: Value {
        get {
            return container.object(forKey: key) as? Value ?? defaultValue
        }
        set {
            if let optional = newValue as? AnyOptional, optional.isNil {
                container.removeObject(forKey: key)
            } else {
                container.set(newValue, forKey: key) //this is where I set my value
            }
            publisher.send(newValue)
        }
    }

    var projectedValue: AnyPublisher<Value, Never> {
        return publisher.eraseToAnyPublisher()
    }
}

extension UserDefault where Value: ExpressibleByNilLiteral {
    init(key: UserDefaults.Key, _ container: UserDefaults = .shared) {
        self.init(key: key.rawValue, defaultValue: nil, container: container)
    }
}

class LoginViewModel: ObservableObject {
    @Published var githubId = UserDefaults.githubId ?? ""
    private var subscriptions = Set<AnyCancellable>()
    
    init() {
        $githubId
            .sink { githubId in
                UserDefaults.githubId = githubId
            }
            .store(in: &subscriptions)
    }
}