Simple propertyWrapper for UserDefaults

UserDefaultsExtended.swift

@propertyWrapper
class UserDefaultsExtended<Type: Codable> {
    let key: String
    let loc: UserDefaults
    var actualValue: Type?
    
    init(key: String, loc: UserDefaults = UserDefaults.standard) {
        self.key = key
        self.loc = loc
    }
    
    var wrappedValue: Type? {
        set {
            actualValue = newValue
            if let obj = newValue {
                if let data = try? JSONEncoder().encode(obj) {
                    loc.set(data, forKey: mixKey)
                    loc.synchronize()
                }
            } else {
                loc.set(nil, forKey: mixKey)
                loc.synchronize()
            }
        }
        get {
            if actualValue == nil {
                if let data = loc.value(forKey: mixKey) as? Data {
                    actualValue = try? JSONDecoder().decode(Type.self, from: data)
                }
            }
            return actualValue
        }
    }
    
    private lazy var mixKey = "\(key)"
}

class UserDefaultsItems {
    
    @UserDefaultsExtended(key: "isLoggedIn")
    static var isLoggedIn: Bool?
    
}