{"id":410557,"date":"2024-06-29T21:27:34","date_gmt":"2024-06-29T21:27:34","guid":{"rendered":"http:\/\/savepearlharbor.com\/?p=410557"},"modified":"-0001-11-30T00:00:00","modified_gmt":"-0001-11-29T21:00:00","slug":"","status":"publish","type":"post","link":"https:\/\/savepearlharbor.com\/?p=410557","title":{"rendered":"Swift. UserDefaults. Property wrapper<\/span>"},"content":{"rendered":"
<\/div>\n
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\"Xcode\"
Xcode<\/figcaption><\/figure>\n

\u0412\u0440\u044f\u0434 \u043b\u0438 \u043c\u043e\u0436\u043d\u043e \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u0438\u0442\u044c \u0445\u043e\u0442\u044c \u043e\u0434\u043d\u043e \u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u0435, \u043a\u043e\u0442\u043e\u0440\u043e\u0435 \u043d\u0435 \u0442\u0440\u0435\u0431\u0443\u0435\u0442 \u0441\u043e\u0445\u0440\u0430\u043d\u0435\u043d\u0438\u044f \u043d\u0430\u0441\u0442\u0440\u043e\u0435\u043a \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u044f. \u041e\u0447\u0435\u0432\u0438\u0434\u043d\u043e, \u0447\u0442\u043e \u0434\u043b\u044f \u044d\u0442\u0438\u0445 \u0446\u0435\u043b\u0435\u0439 \u0441\u0443\u0449\u0435\u0441\u0442\u0432\u0443\u0435\u0442 \u043c\u0430\u0441\u0441\u0430 \u0440\u0435\u0448\u0435\u043d\u0438\u0439, \u0438 \u043a\u0430\u0436\u0434\u043e\u0435 \u0438\u0437 \u043d\u0438\u0445 \u0440\u0435\u0448\u0430\u0435\u0442 \u043e\u0434\u043d\u0443, \u043a\u043e\u043d\u043a\u0440\u0435\u0442\u043d\u0443\u044e \u0437\u0430\u0434\u0430\u0447\u0443. \u0421\u0435\u0433\u043e\u0434\u043d\u044f \u0440\u0435\u0447\u044c \u043f\u043e\u0439\u0434\u0435\u0442 \u043e \u043f\u043e\u0441\u0442\u043e\u044f\u043d\u043d\u043e\u043c \u0445\u0440\u0430\u043d\u0438\u043b\u0438\u0449\u0435 \u0434\u0430\u043d\u043d\u044b\u0445 UserDefaults \u0438 \u0435\u0433\u043e \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0438 \u0434\u043b\u044f \u0445\u0440\u0430\u043d\u0435\u043d\u0438\u044f \u0434\u0430\u043d\u043d\u044b\u0445.<\/p>\n

\u0420\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u044f<\/h2>\n

\u0412\u044b\u043f\u043e\u043b\u043d\u0438\u0432 \u043f\u043e\u0438\u0441\u043a \u0441\u0443\u0449\u0435\u0441\u0442\u0432\u0443\u044e\u0449\u0438\u0445 \u0440\u0435\u0448\u0435\u043d\u0438\u0439 \u043d\u0430 \u043f\u0440\u043e\u0441\u0442\u043e\u0440\u0430\u0445 \u0441\u0435\u0442\u0438 \u0438\u043d\u0442\u0435\u0440\u043d\u0435\u0442 \u0431\u044b\u043b\u0438 \u043d\u0430\u0439\u0434\u0435\u043d\u044b \u0441\u043b\u0435\u0434\u0443\u044e\u0449\u0438\u0435 \u043c\u0430\u0442\u0435\u0440\u0438\u0430\u043b\u044b:<\/p>\n

    \n
  1. \n

    Property wrappers in Swift<\/a><\/p>\n<\/li>\n

  2. \n

    Create the Perfect UserDefaults Wrapper Using Property Wrapper<\/a><\/p>\n<\/li>\n

  3. \n

    A better approach to writing a UserDefaults Property Wrapper<\/a><\/p>\n<\/li>\n<\/ol>\n

    \u041e\u0434\u043d\u0430\u043a\u043e \u0432\u0441\u0435 \u043e\u043d\u0438 \u0438\u043c\u0435\u044e\u0442 \u043d\u0435\u0441\u043a\u043e\u043b\u044c\u043a\u043e \u043d\u0435\u0434\u043e\u0441\u0442\u0430\u0442\u043a\u043e\u0432:<\/p>\n

      \n
    1. \n

      \u0417\u043d\u0430\u0447\u0435\u043d\u0438\u0435 \u043d\u0435 \u043c\u043e\u0436\u0435\u0442 \u0431\u044b\u0442\u044c \u043e\u043f\u0446\u0438\u043e\u043d\u0430\u043b\u044c\u043d\u044b\u043c, \u0432\u0441\u043b\u0435\u0434\u0441\u0442\u0432\u0438\u0435 \u0447\u0435\u0433\u043e \u0442\u0440\u0435\u0431\u0443\u0435\u0442\u0441\u044f \u0443\u043a\u0430\u0437\u044b\u0432\u0430\u0442\u044c \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u0435 \u043f\u043e-\u0443\u043c\u043e\u043b\u0447\u0430\u043d\u0438\u044e<\/p>\n<\/li>\n

    2. \n

      \u0417\u043d\u0430\u0447\u0435\u043d\u0438\u0435 \u043d\u0435 \u043c\u043e\u0436\u0435\u0442 \u0431\u044b\u0442\u044c \u043f\u0435\u0440\u0435\u0447\u0438\u0441\u043b\u0435\u043d\u0438\u0435\u043c \u0438\u043b\u0438 OptionSet<\/p>\n<\/li>\n

    3. \n

      \u0412\u0441\u0435 \u043e\u043d\u0438 \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0442 \u0441\u043e\u0445\u0440\u0430\u043d\u0438\u0442\u044c \u0432 \u0445\u0440\u0430\u043d\u0438\u043b\u0438\u0449\u0435 \u043d\u0435\u043f\u043e\u0434\u0434\u0435\u0440\u0436\u0438\u0432\u0430\u0435\u043c\u044b\u0435 \u0442\u0438\u043f\u044b \u0434\u0430\u043d\u043d\u044b\u0445, \u0432\u0441\u043b\u0435\u0434\u0441\u0442\u0432\u0438\u0435 \u0447\u0435\u0433\u043e \u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u0435 \u0430\u0432\u0430\u0440\u0438\u0439\u043d\u043e \u0437\u0430\u0432\u0435\u0440\u0448\u0430\u0435\u0442 \u0441\u0432\u043e\u044e \u0440\u0430\u0431\u043e\u0442\u0443<\/p>\n<\/li>\n<\/ol>\n

      \u041d\u043e \u0435\u0441\u043b\u0438 \u043e\u0431\u0440\u0430\u0442\u0438\u0442\u044c\u0441\u044f \u043a \u043f\u0435\u0440\u0432\u043e\u0438\u0441\u0442\u043e\u0447\u043d\u0438\u043a\u0443 \u0438 \u0438\u0437\u0443\u0447\u0438\u0442\u044c AppStorage<\/a> \u043e\u0442 Apple<\/a>, \u0442\u043e \u0435\u0434\u0438\u043d\u0441\u0442\u0432\u0435\u043d\u043d\u044b\u0439 \u043d\u0435\u0434\u043e\u0441\u0442\u0430\u0442\u043e\u043a, \u043f\u0440\u0438\u0441\u0443\u0449\u0438\u0439 \u0443\u0436\u0435 \u043a \u0434\u0430\u043d\u043d\u043e\u043c\u0443 \u0440\u0435\u0448\u0435\u043d\u0438\u044e \u044f\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u043c\u0438\u043d\u0438\u043c\u0430\u043b\u044c\u043d\u0430\u044f \u0432\u0435\u0440\u0441\u0438\u044f iOS 14<\/strong>, \u0430 \u0442\u0430\u043a\u0436\u0435 \u0437\u0430\u0432\u0438\u0441\u0438\u043c\u043e\u0441\u0442\u044c \u043e\u0442 framework SwiftUI<\/strong>.<\/p>\n

      \u041d\u0438\u0436\u0435 \u043f\u0440\u0435\u0434\u043b\u0430\u0433\u0430\u0435\u0442\u0441\u044f propertyWrapper UserDefault, \u043a\u043e\u0442\u043e\u0440\u044b\u0439 \u043b\u0438\u0448\u0435\u043d \u0432\u0441\u0435\u0445 \u043f\u0435\u0440\u0435\u0447\u0438\u0441\u043b\u0435\u043d\u043d\u044b\u0445 \u043d\u0435\u0434\u043e\u0441\u0442\u0430\u0442\u043a\u043e\u0432, \u0432 \u0442\u043e \u0432\u0440\u0435\u043c\u044f \u043a\u0430\u043a \u0440\u0435\u0448\u0430\u0435\u0442 \u043f\u043e\u0441\u0442\u0430\u0432\u043b\u0435\u043d\u043d\u0443\u044e \u0437\u0430\u0434\u0430\u0447\u0443.<\/p>\n

      import SwiftUI  @propertyWrapper public struct UserDefault<Value>: DynamicProperty { private let get: () -> Value private let set: (Value) -> Void  public var wrappedValue: Value { get { get() } nonmutating set { set(newValue) } } }  public extension UserDefault { init(wrappedValue: Value, _ key: String, store: UserDefaults = .standard) where Value == Bool { self.init(defaultValue: wrappedValue, key: key, store: store) }  init(wrappedValue: Value, _ key: String, store: UserDefaults = .standard) where Value == Int { self.init(defaultValue: wrappedValue, key: key, store: store) }  init(wrappedValue: Value, _ key: String, store: UserDefaults = .standard) where Value == Double { self.init(defaultValue: wrappedValue, key: key, store: store) }  init(wrappedValue: Value, _ key: String, store: UserDefaults = .standard) where Value == String { self.init(defaultValue: wrappedValue, key: key, store: store) }  init(wrappedValue: Value, _ key: String, store: UserDefaults = .standard) where Value == URL { self.init(defaultValue: wrappedValue, key: key, store: store) }  init(wrappedValue: Value, _ key: String, store: UserDefaults = .standard) where Value == Data { self.init(defaultValue: wrappedValue, key: key, store: store) }  private init(defaultValue: Value, key: String, store: UserDefaults) { get = { let value = store.value(forKey: key) as? Value return value ?? defaultValue }  set = { newValue in store.set(newValue, forKey: key) } } }  public extension UserDefault where Value: ExpressibleByNilLiteral { init(_ key: String, store: UserDefaults = .standard) where Value == Bool? { self.init(wrappedType: Bool.self, key: key, store: store) }  init(_ key: String, store: UserDefaults = .standard) where Value == Int? { self.init(wrappedType: Int.self, key: key, store: store) }  init(_ key: String, store: UserDefaults = .standard) where Value == Double? { self.init(wrappedType: Double.self, key: key, store: store) }  init(_ key: String, store: UserDefaults = .standard) where Value == String? { self.init(wrappedType: String.self, key: key, store: store) }  init(_ key: String, store: UserDefaults = .standard) where Value == URL? { self.init(wrappedType: URL.self, key: key, store: store) }  init(_ key: String, store: UserDefaults = .standard) where Value == Data? { self.init(wrappedType: Data.self, key: key, store: store) }  private init<T>(wrappedType: T.Type, key: String, store: UserDefaults) { get = { let value = store.value(forKey: key) as? Value return value ?? nil }  set = { newValue in let newValue = newValue as? Optional<T>  if let newValue { store.set(newValue, forKey: key) } else { store.removeObject(forKey: key) } } } }  public extension UserDefault where Value: RawRepresentable { init(wrappedValue: Value, _ key: String, store: UserDefaults = .standard) where Value.RawValue == String { self.init(defaultValue: wrappedValue, key: key, store: store) }  init(wrappedValue: Value, _ key: String, store: UserDefaults = .standard) where Value.RawValue == Int { self.init(defaultValue: wrappedValue, key: key, store: store) }  private init(defaultValue: Value, key: String, store: UserDefaults) { get = { var value: Value?  if let rawValue = store.value(forKey: key) as? Value.RawValue { value = Value(rawValue: rawValue) }  return value ?? defaultValue }  set = { newValue in let value = newValue.rawValue store.set(value, forKey: key) } } }  public extension UserDefault { init<R>(_ key: String, store: UserDefaults = .standard) where Value == R?, R: RawRepresentable, R.RawValue == Int { self.init(key: key, store: store) }  init<R>(_ key: String, store: UserDefaults = .standard) where Value == R?, R: RawRepresentable, R.RawValue == String { self.init(key: key, store: store) }  private init<R>(key: String, store: UserDefaults) where Value == R?, R: RawRepresentable { get = { if let rawValue = store.value(forKey: key) as? R.RawValue { return R(rawValue: rawValue) } else { return nil } }   set = { newValue in let newValue = newValue as Optional<R>  if let newValue { store.set(newValue.rawValue, forKey: key) } else { store.removeObject(forKey: key) } } } } <\/code><\/pre>\n
      \u0421\u0442\u043e\u0438\u0442 \u043e\u0442\u043c\u0435\u0442\u0438\u0442\u044c, \u0447\u0442\u043e \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0435 propertyWrapper \u043d\u0430\u043c\u043d\u043e\u0433\u043e \u0443\u0434\u043e\u0431\u043d\u0435\u0439, \u0442\u0430\u043a \u043a\u0430\u043a \u043a\u043e\u0434\u0430 \u0441\u0442\u0430\u043d\u043e\u0432\u0438\u0442\u0441\u044f \u0441\u0443\u0449\u0435\u0441\u0442\u0432\u0435\u043d\u043d\u043e \u043c\u0435\u043d\u044c\u0448\u0435, \u0441\u043e\u043e\u0442\u0432\u0435\u0442\u0441\u0442\u0432\u0435\u043d\u043d\u043e \u0438 \u0447\u0438\u0442\u0430\u0435\u0442\u0441\u044f \u043e\u043d \u043b\u0435\u0433\u0447\u0435.<\/p>\n
      final class UserSettings { @UserDefault(\"age\") var age: Int?  @UserDefault(\"name\") var name: String?  @UserDefault(\"planet\") var planet: Planet = .earth  func clear() { age = nil name = nil planet = .earth } }<\/code><\/pre>\n
      \u0417\u0430\u043a\u043b\u044e\u0447\u0435\u043d\u0438\u0435<\/h2>\n
      \u0412 \u043f\u043e\u0441\u043b\u0435\u0434\u043d\u0435\u0435 \u0432\u0440\u0435\u043c\u044f, \u0441 \u043c\u043e\u043c\u0435\u043d\u0442\u0430 \u043f\u043e\u044f\u0432\u043b\u0435\u043d\u0438\u044f SwiftUI, \u0432\u0441\u0435 \u0431\u043e\u043b\u044c\u0448\u0435\u0439 \u043f\u043e\u043f\u0443\u043b\u044f\u0440\u043d\u043e\u0441\u0442\u044c\u044e \u043f\u043e\u043b\u044c\u0437\u0443\u044e\u0442\u0441\u044f @propertyWrapper<\/a>. \u041e\u0434\u043d\u0430\u043a\u043e \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0435 \u0442\u0430\u043a\u0438\u0445 \u043e\u0431\u044a\u0435\u043a\u0442\u043e\u0432 \u043d\u0430\u043a\u043b\u0430\u0434\u044b\u0432\u0430\u0435\u0442 \u0434\u043e\u043f\u043e\u043b\u043d\u0438\u0442\u0435\u043b\u044c\u043d\u044b\u0435 \u043e\u0433\u0440\u0430\u043d\u0438\u0447\u0435\u043d\u0438\u044f. \u041a \u043f\u0440\u0438\u043c\u0435\u0440\u0443, \u043d\u0435\u043e\u0431\u0445\u043e\u0434\u0438\u043c\u043e \u043f\u043e\u0434\u043d\u0438\u043c\u0430\u0442\u044c \u043c\u0438\u043d\u0438\u043c\u0430\u043b\u044c\u043d\u0443\u044e \u0432\u0435\u0440\u0441\u0438\u044e iOS \u0438 \u0432\u043d\u0435\u0434\u0440\u044f\u0442\u044c \u0434\u043e\u043f\u043e\u043b\u043d\u0438\u0442\u0435\u043b\u044c\u043d\u0443\u044e \u0437\u0430\u0432\u0438\u0441\u0438\u043c\u043e\u0441\u0442\u044c \u043e\u0442 framework SwiftUI. \u041d\u043e \u044d\u0442\u043e \u0432\u043e\u0432\u0441\u0435 \u043d\u0435 \u043e\u0437\u043d\u0430\u0447\u0430\u0435\u0442, \u0447\u0442\u043e \u043d\u0443\u0436\u043d\u043e \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u044c\u0441\u044f \u0442\u0435\u043c, \u0447\u0442\u043e \u0435\u0441\u0442\u044c, \u0438 \u043f\u0440\u0438\u043c\u0435\u0440 \u0442\u043e\u043c\u0443 \u0431\u044b\u043b \u043e\u043f\u0438\u0441\u0430\u043d \u0432 \u044d\u0442\u043e\u0439 \u0441\u0442\u0430\u0442\u044c\u0435.<\/p>\n
        \n
      1. \n
        \u041e\u0440\u0438\u0433\u0438\u043d\u0430\u043b \u0441\u0442\u0430\u0442\u044c\u0438<\/a><\/p>\n<\/li>\n
      2. \n
        UserDefaults<\/a><\/p>\n<\/li>\n
      3. \n
        AppStorage<\/a><\/p>\n<\/li>\n<\/ol>\n<\/div>\n<\/div>\n<\/div>\n
        <\/div>\n

         \u0441\u0441\u044b\u043b\u043a\u0430 \u043d\u0430 \u043e\u0440\u0438\u0433\u0438\u043d\u0430\u043b \u0441\u0442\u0430\u0442\u044c\u0438          https:\/\/habr.com\/ru\/articles\/670378\/<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"
        <\/div>\n
        \n
        \n
        \n
        \n
        Xcode<\/figcaption><\/figure>\n
        \u0412\u0440\u044f\u0434 \u043b\u0438 \u043c\u043e\u0436\u043d\u043e \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u0438\u0442\u044c \u0445\u043e\u0442\u044c \u043e\u0434\u043d\u043e \u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u0435, \u043a\u043e\u0442\u043e\u0440\u043e\u0435 \u043d\u0435 \u0442\u0440\u0435\u0431\u0443\u0435\u0442 \u0441\u043e\u0445\u0440\u0430\u043d\u0435\u043d\u0438\u044f \u043d\u0430\u0441\u0442\u0440\u043e\u0435\u043a \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u044f. \u041e\u0447\u0435\u0432\u0438\u0434\u043d\u043e, \u0447\u0442\u043e \u0434\u043b\u044f \u044d\u0442\u0438\u0445 \u0446\u0435\u043b\u0435\u0439 \u0441\u0443\u0449\u0435\u0441\u0442\u0432\u0443\u0435\u0442 \u043c\u0430\u0441\u0441\u0430 \u0440\u0435\u0448\u0435\u043d\u0438\u0439, \u0438 \u043a\u0430\u0436\u0434\u043e\u0435 \u0438\u0437 \u043d\u0438\u0445 \u0440\u0435\u0448\u0430\u0435\u0442 \u043e\u0434\u043d\u0443, \u043a\u043e\u043d\u043a\u0440\u0435\u0442\u043d\u0443\u044e \u0437\u0430\u0434\u0430\u0447\u0443. \u0421\u0435\u0433\u043e\u0434\u043d\u044f \u0440\u0435\u0447\u044c \u043f\u043e\u0439\u0434\u0435\u0442 \u043e \u043f\u043e\u0441\u0442\u043e\u044f\u043d\u043d\u043e\u043c \u0445\u0440\u0430\u043d\u0438\u043b\u0438\u0449\u0435 \u0434\u0430\u043d\u043d\u044b\u0445 UserDefaults \u0438 \u0435\u0433\u043e \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0438 \u0434\u043b\u044f \u0445\u0440\u0430\u043d\u0435\u043d\u0438\u044f \u0434\u0430\u043d\u043d\u044b\u0445.<\/p>\n
        \u0420\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u044f<\/h2>\n
        \u0412\u044b\u043f\u043e\u043b\u043d\u0438\u0432 \u043f\u043e\u0438\u0441\u043a \u0441\u0443\u0449\u0435\u0441\u0442\u0432\u0443\u044e\u0449\u0438\u0445 \u0440\u0435\u0448\u0435\u043d\u0438\u0439 \u043d\u0430 \u043f\u0440\u043e\u0441\u0442\u043e\u0440\u0430\u0445 \u0441\u0435\u0442\u0438 \u0438\u043d\u0442\u0435\u0440\u043d\u0435\u0442 \u0431\u044b\u043b\u0438 \u043d\u0430\u0439\u0434\u0435\u043d\u044b \u0441\u043b\u0435\u0434\u0443\u044e\u0449\u0438\u0435 \u043c\u0430\u0442\u0435\u0440\u0438\u0430\u043b\u044b:<\/p>\n
          \n
        1. \n
          Property wrappers in Swift<\/a><\/p>\n<\/li>\n
        2. \n
          Create the Perfect UserDefaults Wrapper Using Property Wrapper<\/a><\/p>\n<\/li>\n
        3. \n
          A better approach to writing a UserDefaults Property Wrapper<\/a><\/p>\n<\/li>\n<\/ol>\n
          \u041e\u0434\u043d\u0430\u043a\u043e \u0432\u0441\u0435 \u043e\u043d\u0438 \u0438\u043c\u0435\u044e\u0442 \u043d\u0435\u0441\u043a\u043e\u043b\u044c\u043a\u043e \u043d\u0435\u0434\u043e\u0441\u0442\u0430\u0442\u043a\u043e\u0432:<\/p>\n
            \n
          1. \n
            \u0417\u043d\u0430\u0447\u0435\u043d\u0438\u0435 \u043d\u0435 \u043c\u043e\u0436\u0435\u0442 \u0431\u044b\u0442\u044c \u043e\u043f\u0446\u0438\u043e\u043d\u0430\u043b\u044c\u043d\u044b\u043c, \u0432\u0441\u043b\u0435\u0434\u0441\u0442\u0432\u0438\u0435 \u0447\u0435\u0433\u043e \u0442\u0440\u0435\u0431\u0443\u0435\u0442\u0441\u044f \u0443\u043a\u0430\u0437\u044b\u0432\u0430\u0442\u044c \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u0435 \u043f\u043e-\u0443\u043c\u043e\u043b\u0447\u0430\u043d\u0438\u044e<\/p>\n<\/li>\n
          2. \n
            \u0417\u043d\u0430\u0447\u0435\u043d\u0438\u0435 \u043d\u0435 \u043c\u043e\u0436\u0435\u0442 \u0431\u044b\u0442\u044c \u043f\u0435\u0440\u0435\u0447\u0438\u0441\u043b\u0435\u043d\u0438\u0435\u043c \u0438\u043b\u0438 OptionSet<\/p>\n<\/li>\n
          3. \n
            \u0412\u0441\u0435 \u043e\u043d\u0438 \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0442 \u0441\u043e\u0445\u0440\u0430\u043d\u0438\u0442\u044c \u0432 \u0445\u0440\u0430\u043d\u0438\u043b\u0438\u0449\u0435 \u043d\u0435\u043f\u043e\u0434\u0434\u0435\u0440\u0436\u0438\u0432\u0430\u0435\u043c\u044b\u0435 \u0442\u0438\u043f\u044b \u0434\u0430\u043d\u043d\u044b\u0445, \u0432\u0441\u043b\u0435\u0434\u0441\u0442\u0432\u0438\u0435 \u0447\u0435\u0433\u043e \u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u0435 \u0430\u0432\u0430\u0440\u0438\u0439\u043d\u043e \u0437\u0430\u0432\u0435\u0440\u0448\u0430\u0435\u0442 \u0441\u0432\u043e\u044e \u0440\u0430\u0431\u043e\u0442\u0443<\/p>\n<\/li>\n<\/ol>\n
            \u041d\u043e \u0435\u0441\u043b\u0438 \u043e\u0431\u0440\u0430\u0442\u0438\u0442\u044c\u0441\u044f \u043a \u043f\u0435\u0440\u0432\u043e\u0438\u0441\u0442\u043e\u0447\u043d\u0438\u043a\u0443 \u0438 \u0438\u0437\u0443\u0447\u0438\u0442\u044c AppStorage<\/a> \u043e\u0442 Apple<\/a>, \u0442\u043e \u0435\u0434\u0438\u043d\u0441\u0442\u0432\u0435\u043d\u043d\u044b\u0439 \u043d\u0435\u0434\u043e\u0441\u0442\u0430\u0442\u043e\u043a, \u043f\u0440\u0438\u0441\u0443\u0449\u0438\u0439 \u0443\u0436\u0435 \u043a \u0434\u0430\u043d\u043d\u043e\u043c\u0443 \u0440\u0435\u0448\u0435\u043d\u0438\u044e \u044f\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u043c\u0438\u043d\u0438\u043c\u0430\u043b\u044c\u043d\u0430\u044f \u0432\u0435\u0440\u0441\u0438\u044f iOS 14<\/strong>, \u0430 \u0442\u0430\u043a\u0436\u0435 \u0437\u0430\u0432\u0438\u0441\u0438\u043c\u043e\u0441\u0442\u044c \u043e\u0442 framework SwiftUI<\/strong>.<\/p>\n
            \u041d\u0438\u0436\u0435 \u043f\u0440\u0435\u0434\u043b\u0430\u0433\u0430\u0435\u0442\u0441\u044f propertyWrapper UserDefault, \u043a\u043e\u0442\u043e\u0440\u044b\u0439 \u043b\u0438\u0448\u0435\u043d \u0432\u0441\u0435\u0445 \u043f\u0435\u0440\u0435\u0447\u0438\u0441\u043b\u0435\u043d\u043d\u044b\u0445 \u043d\u0435\u0434\u043e\u0441\u0442\u0430\u0442\u043a\u043e\u0432, \u0432 \u0442\u043e \u0432\u0440\u0435\u043c\u044f \u043a\u0430\u043a \u0440\u0435\u0448\u0430\u0435\u0442 \u043f\u043e\u0441\u0442\u0430\u0432\u043b\u0435\u043d\u043d\u0443\u044e \u0437\u0430\u0434\u0430\u0447\u0443.<\/p>\n
            import SwiftUI  @propertyWrapper public struct UserDefault<Value>: DynamicProperty { private let get: () -> Value private let set: (Value) -> Void  public var wrappedValue: Value { get { get() } nonmutating set { set(newValue) } } }  public extension UserDefault { init(wrappedValue: Value, _ key: String, store: UserDefaults = .standard) where Value == Bool { self.init(defaultValue: wrappedValue, key: key, store: store) }  init(wrappedValue: Value, _ key: String, store: UserDefaults = .standard) where Value == Int { self.init(defaultValue: wrappedValue, key: key, store: store) }  init(wrappedValue: Value, _ key: String, store: UserDefaults = .standard) where Value == Double { self.init(defaultValue: wrappedValue, key: key, store: store) }  init(wrappedValue: Value, _ key: String, store: UserDefaults = .standard) where Value == String { self.init(defaultValue: wrappedValue, key: key, store: store) }  init(wrappedValue: Value, _ key: String, store: UserDefaults = .standard) where Value == URL { self.init(defaultValue: wrappedValue, key: key, store: store) }  init(wrappedValue: Value, _ key: String, store: UserDefaults = .standard) where Value == Data { self.init(defaultValue: wrappedValue, key: key, store: store) }  private init(defaultValue: Value, key: String, store: UserDefaults) { get = { let value = store.value(forKey: key) as? Value return value ?? defaultValue }  set = { newValue in store.set(newValue, forKey: key) } } }  public extension UserDefault where Value: ExpressibleByNilLiteral { init(_ key: String, store: UserDefaults = .standard) where Value == Bool? { self.init(wrappedType: Bool.self, key: key, store: store) }  init(_ key: String, store: UserDefaults = .standard) where Value == Int? { self.init(wrappedType: Int.self, key: key, store: store) }  init(_ key: String, store: UserDefaults = .standard) where Value == Double? { self.init(wrappedType: Double.self, key: key, store: store) }  init(_ key: String, store: UserDefaults = .standard) where Value == String? { self.init(wrappedType: String.self, key: key, store: store) }  init(_ key: String, store: UserDefaults = .standard) where Value == URL? { self.init(wrappedType: URL.self, key: key, store: store) }  init(_ key: String, store: UserDefaults = .standard) where Value == Data? { self.init(wrappedType: Data.self, key: key, store: store) }  private init<T>(wrappedType: T.Type, key: String, store: UserDefaults) { get = { let value = store.value(forKey: key) as? Value return value ?? nil }  set = { newValue in let newValue = newValue as? Optional<T>  if let newValue { store.set(newValue, forKey: key) } else { store.removeObject(forKey: key) } } } }  public extension UserDefault where Value: RawRepresentable { init(wrappedValue: Value, _ key: String, store: UserDefaults = .standard) where Value.RawValue == String { self.init(defaultValue: wrappedValue, key: key, store: store) }  init(wrappedValue: Value, _ key: String, store: UserDefaults = .standard) where Value.RawValue == Int { self.init(defaultValue: wrappedValue, key: key, store: store) }  private init(defaultValue: Value, key: String, store: UserDefaults) { get = { var value: Value?  if let rawValue = store.value(forKey: key) as? Value.RawValue { value = Value(rawValue: rawValue) }  return value ?? defaultValue }  set = { newValue in let value = newValue.rawValue store.set(value, forKey: key) } } }  public extension UserDefault { init<R>(_ key: String, store: UserDefaults = .standard) where Value == R?, R: RawRepresentable, R.RawValue == Int { self.init(key: key, store: store) }  init<R>(_ key: String, store: UserDefaults = .standard) where Value == R?, R: RawRepresentable, R.RawValue == String { self.init(key: key, store: store) }  private init<R>(key: String, store: UserDefaults) where Value == R?, R: RawRepresentable { get = { if let rawValue = store.value(forKey: key) as? R.RawValue { return R(rawValue: rawValue) } else { return nil } }   set = { newValue in let newValue = newValue as Optional<R>  if let newValue { store.set(newValue.rawValue, forKey: key) } else { store.removeObject(forKey: key) } } } } <\/code><\/pre>\n
            \u0421\u0442\u043e\u0438\u0442 \u043e\u0442\u043c\u0435\u0442\u0438\u0442\u044c, \u0447\u0442\u043e \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0435 propertyWrapper \u043d\u0430\u043c\u043d\u043e\u0433\u043e \u0443\u0434\u043e\u0431\u043d\u0435\u0439, \u0442\u0430\u043a \u043a\u0430\u043a \u043a\u043e\u0434\u0430 \u0441\u0442\u0430\u043d\u043e\u0432\u0438\u0442\u0441\u044f \u0441\u0443\u0449\u0435\u0441\u0442\u0432\u0435\u043d\u043d\u043e \u043c\u0435\u043d\u044c\u0448\u0435, \u0441\u043e\u043e\u0442\u0432\u0435\u0442\u0441\u0442\u0432\u0435\u043d\u043d\u043e \u0438 \u0447\u0438\u0442\u0430\u0435\u0442\u0441\u044f \u043e\u043d \u043b\u0435\u0433\u0447\u0435.<\/p>\n
            final class UserSettings { @UserDefault(\"age\") var age: Int?  @UserDefault(\"name\") var name: String?  @UserDefault(\"planet\") var planet: Planet = .earth  func clear() { age = nil name = nil planet = .earth } }<\/code><\/pre>\n
            \u0417\u0430\u043a\u043b\u044e\u0447\u0435\u043d\u0438\u0435<\/h2>\n
            \u0412 \u043f\u043e\u0441\u043b\u0435\u0434\u043d\u0435\u0435 \u0432\u0440\u0435\u043c\u044f, \u0441 \u043c\u043e\u043c\u0435\u043d\u0442\u0430 \u043f\u043e\u044f\u0432\u043b\u0435\u043d\u0438\u044f SwiftUI, \u0432\u0441\u0435 \u0431\u043e\u043b\u044c\u0448\u0435\u0439 \u043f\u043e\u043f\u0443\u043b\u044f\u0440\u043d\u043e\u0441\u0442\u044c\u044e \u043f\u043e\u043b\u044c\u0437\u0443\u044e\u0442\u0441\u044f @propertyWrapper<\/a>. \u041e\u0434\u043d\u0430\u043a\u043e \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0435 \u0442\u0430\u043a\u0438\u0445 \u043e\u0431\u044a\u0435\u043a\u0442\u043e\u0432 \u043d\u0430\u043a\u043b\u0430\u0434\u044b\u0432\u0430\u0435\u0442 \u0434\u043e\u043f\u043e\u043b\u043d\u0438\u0442\u0435\u043b\u044c\u043d\u044b\u0435 \u043e\u0433\u0440\u0430\u043d\u0438\u0447\u0435\u043d\u0438\u044f. \u041a \u043f\u0440\u0438\u043c\u0435\u0440\u0443, \u043d\u0435\u043e\u0431\u0445\u043e\u0434\u0438\u043c\u043e \u043f\u043e\u0434\u043d\u0438\u043c\u0430\u0442\u044c \u043c\u0438\u043d\u0438\u043c\u0430\u043b\u044c\u043d\u0443\u044e \u0432\u0435\u0440\u0441\u0438\u044e iOS \u0438 \u0432\u043d\u0435\u0434\u0440\u044f\u0442\u044c \u0434\u043e\u043f\u043e\u043b\u043d\u0438\u0442\u0435\u043b\u044c\u043d\u0443\u044e \u0437\u0430\u0432\u0438\u0441\u0438\u043c\u043e\u0441\u0442\u044c \u043e\u0442 framework SwiftUI. \u041d\u043e \u044d\u0442\u043e \u0432\u043e\u0432\u0441\u0435 \u043d\u0435 \u043e\u0437\u043d\u0430\u0447\u0430\u0435\u0442, \u0447\u0442\u043e \u043d\u0443\u0436\u043d\u043e \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u044c\u0441\u044f \u0442\u0435\u043c, \u0447\u0442\u043e \u0435\u0441\u0442\u044c, \u0438 \u043f\u0440\u0438\u043c\u0435\u0440 \u0442\u043e\u043c\u0443 \u0431\u044b\u043b \u043e\u043f\u0438\u0441\u0430\u043d \u0432 \u044d\u0442\u043e\u0439 \u0441\u0442\u0430\u0442\u044c\u0435.<\/p>\n
              \n
            1. \n
              \u041e\u0440\u0438\u0433\u0438\u043d\u0430\u043b \u0441\u0442\u0430\u0442\u044c\u0438<\/a><\/p>\n<\/li>\n
            2. \n
              UserDefaults<\/a><\/p>\n<\/li>\n
            3. \n
              AppStorage<\/a><\/p>\n<\/li>\n<\/ol>\n<\/div>\n<\/div>\n<\/div>\n
              <\/div>\n

               \u0441\u0441\u044b\u043b\u043a\u0430 \u043d\u0430 \u043e\u0440\u0438\u0433\u0438\u043d\u0430\u043b \u0441\u0442\u0430\u0442\u044c\u0438                https:\/\/habr.com\/ru\/articles\/670378\/<\/a>
              <\/br><\/br><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[],"tags":[],"class_list":["post-410557","post","type-post","status-publish","format-standard","hentry"],"_links":{"self":[{"href":"https:\/\/savepearlharbor.com\/index.php?rest_route=\/wp\/v2\/posts\/410557","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/savepearlharbor.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/savepearlharbor.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/savepearlharbor.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/savepearlharbor.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=410557"}],"version-history":[{"count":0,"href":"https:\/\/savepearlharbor.com\/index.php?rest_route=\/wp\/v2\/posts\/410557\/revisions"}],"wp:attachment":[{"href":"https:\/\/savepearlharbor.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=410557"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/savepearlharbor.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=410557"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/savepearlharbor.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=410557"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}