{"id":360569,"date":"2024-05-21T00:55:52","date_gmt":"2024-05-21T00:55:52","guid":{"rendered":"http:\/\/savepearlharbor.com\/?p=360569"},"modified":"-0001-11-30T00:00:00","modified_gmt":"-0001-11-29T21:00:00","slug":"","status":"publish","type":"post","link":"https:\/\/savepearlharbor.com\/?p=360569","title":{"rendered":"Swift Utilities \u2014 \u0423\u043f\u0440\u043e\u0449\u0430\u0435\u043c \u0440\u0430\u0431\u043e\u0442\u0443 \u0441 UserDefaults<\/span>"},"content":{"rendered":"
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\u0417\u0430 \u0433\u043e\u0434\u044b \u0440\u0430\u0431\u043e\u0442\u044b \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a\u043e\u043c iOS, \u044f \u0441\u043e\u0431\u0440\u0430\u043b \u043c\u043d\u043e\u0436\u0435\u0441\u0442\u0432\u043e \u0438\u043d\u0441\u0442\u0440\u0443\u043c\u0435\u043d\u0442\u043e\u0432 \u0438 \u043f\u043e\u043b\u0435\u0437\u043d\u044b\u0445 \u0448\u0442\u0443\u043a, \u043a\u043e\u0442\u043e\u0440\u044b\u0435 \u043e\u0431\u043b\u0435\u0433\u0447\u0430\u044e\u0442 \u043f\u0440\u043e\u0446\u0435\u0441\u0441 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u043a\u0438. \u0412 \u044d\u0442\u043e\u0439 \u0441\u0442\u0430\u0442\u044c\u0435, \u044f \u0445\u043e\u0447\u0443 \u043f\u043e\u0434\u0435\u043b\u0438\u0442\u044c\u0441\u044f \u043e\u0434\u043d\u0438\u043c \u0438\u0437 \u0442\u0430\u043a\u0438\u0445 \u0438\u043d\u0441\u0442\u0440\u0443\u043c\u0435\u043d\u0442\u043e\u0432. \u042d\u0442\u043e \u0431\u0443\u0434\u0435\u0442 \u043d\u0435 \u0431\u043e\u043b\u044c\u0448\u0430\u044f \u0441\u0442\u0430\u0442\u044c\u044f. \u042f \u043f\u043e\u043a\u0430\u0436\u0443, \u043a\u0430\u043a \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u044c\u0441\u044f \u044d\u0442\u043e\u0439 \u0443\u0442\u0438\u043b\u0438\u0442\u043e\u0439, \u043f\u0440\u043e\u0434\u0435\u043c\u043e\u043d\u0441\u0442\u0440\u0438\u0440\u0443\u044e \u0435\u0451 \u0432 \u0434\u0435\u0439\u0441\u0442\u0432\u0438\u0438. \u041d\u0430\u0434\u0435\u044e\u0441\u044c, \u0447\u0442\u043e \u0441\u0442\u0430\u0442\u044c\u044f \u043e\u043a\u0430\u0436\u0435\u0442\u0441\u044f \u043f\u043e\u043b\u0435\u0437\u043d\u043e\u0439 \u0434\u043b\u044f \u0432\u0430\u0441.<\/p>\n

\u0420\u0430\u0431\u043e\u0442\u0430 \u0441 UserDefaults<\/strong> \u043c\u043e\u0436\u0435\u0442 \u0431\u044b\u0442\u044c \u0443\u0434\u043e\u0431\u043d\u043e\u0439 \u0438 \u043f\u0440\u043e\u0441\u0442\u043e\u0439, \u0432 \u044d\u0442\u043e\u043c \u043f\u043e\u043c\u043e\u0436\u0435\u0442 \u043e\u0431\u0435\u0440\u0442\u043a\u0430 UserDefaultsWrapper<\/code>. \u0414\u0430\u0432\u0430\u0439\u0442\u0435 \u0440\u0430\u0437\u0431\u0435\u0440\u0435\u043c\u0441\u044f, \u043a\u0430\u043a \u043e\u043d\u0430 \u0440\u0430\u0431\u043e\u0442\u0430\u0435\u0442.<\/p>\n

UserDefaultsWrapper<\/code> \u2013 \u044d\u0442\u043e \u0441\u0432\u043e\u0439\u0441\u0442\u0432\u043e-\u043e\u0431\u0435\u0440\u0442\u043a\u0430 (property wrapper<\/code>), \u043a\u043e\u0442\u043e\u0440\u043e\u0435 \u043e\u0431\u043b\u0435\u0433\u0447\u0430\u0435\u0442 \u0441\u043e\u0445\u0440\u0430\u043d\u0435\u043d\u0438\u0435 \u0438 \u0438\u0437\u0432\u043b\u0435\u0447\u0435\u043d\u0438\u0435 \u0434\u0430\u043d\u043d\u044b\u0445 \u0438\u0437 UserDefaults<\/code>. \u041e\u043d \u043e\u0441\u043e\u0431\u0435\u043d\u043d\u043e \u043f\u043e\u043b\u0435\u0437\u0435\u043d, \u043a\u043e\u0433\u0434\u0430 \u0432\u044b \u0440\u0430\u0431\u043e\u0442\u0430\u0435\u0442\u0435 \u0441 \u0442\u0438\u043f\u0430\u043c\u0438 \u0434\u0430\u043d\u043d\u044b\u0445, \u0442\u0430\u043a\u0438\u043c\u0438 \u043a\u0430\u043a URL<\/code>, \u043c\u0430\u0441\u0441\u0438\u0432\u044b, \u0441\u043b\u043e\u0432\u0430\u0440\u0438, \u043f\u0440\u0438\u043c\u0438\u0442\u0438\u0432\u043d\u044b\u0435 \u0442\u0438\u043f\u044b (String<\/code>, Int<\/code>, Bool<\/code> \u0438 \u0442.\u0434.).<\/p>\n

import Foundation  \/\/\/ - Parameters: \/\/\/   - key: Data will be saved and extracted using this key \/\/\/   - defaultValue: This value will be substituted when there is no value \/\/\/   - userDefaults: NSUserDefaults is a hierarchical persistent interprocess (optionally distributed) key-value store, optimized for storing user settings. \/\/\/ \/\/\/ Types an UserDefaultsWrapper can work with: \/\/\/``` \/\/\/  URL? \/\/\/  [Any]? \/\/\/  [String : Any]? \/\/\/  String? \/\/\/  [String]? \/\/\/  Data? \/\/\/  Bool \/\/\/  Int \/\/\/  Float \/\/\/  Double \/\/\/ ``` \/\/\/ \/\/\/ - Warning: \/\/\/  If the type is not optional, default == nil will cause a crash. \/\/\/ \/\/\/ Exemple: \/\/\/ ``` \/\/\/ class User { \/\/\/ \/\/\/    @UserDefaultsWrapper<String>(key: \"FirstName\", default: \"John\") var firstName \/\/\/    @UserDefaultsWrapper(key: \"LastName\", default: \"John\") var lastName: String \/\/\/ \/\/\/    \/\/ OR \/\/\/ \/\/\/    @UserDefaultsWrapper(key: \"Age\") var age: Int? \/\/\/    @UserDefaultsWrapper(key: \"Old\", default: 6) var old: Int? \/\/\/ } \/\/\/ \/\/\/ let user = User() \/\/\/ print(user.firstName) \/\/ John \/\/\/ user.firstName = \"Misha\" \/\/\/ print(user.firstName) \/\/ Misha \/\/\/ $user.firstName.removeObject() \/\/\/ \/\/\/ print(user.old) \/\/ optional(6) \/\/\/ user.old = 18 \/\/\/ print(user.old) \/\/ optional(18) \/\/\/ user.old = nil \/\/\/ print(user.old) \/\/ optional(6) \/\/\/ \/\/\/ print(user.age) \/\/ nil \/\/\/ user.age = 18 \/\/\/ print(user.age) \/\/ optional(18) \/\/\/ user.age = nil \/\/\/ print(user.age) \/\/ nil \/\/\/ ``` @propertyWrapper public struct UserDefaultsWrapper<T> {     private let key: String     private let defaultValue: T!     private let userDefaults: UserDefaults      public var wrappedValue: T {         get {             let anyValue = userDefaults.value(forKey: key)             let value: T = (anyValue as? T) ?? defaultValue             return value         }         set {             if let optional = newValue as? AnyOptional, optional.isNil {                 userDefaults.removeObject(forKey: key)                  if let defaultValue = defaultValue {                     self.set(newValue: defaultValue)                 }             } else {                 self.set(newValue: newValue)             }             userDefaults.synchronize()         }     }      public var projectedValue: ActionUserDefault { self }      \/\/\/ - Parameters:     \/\/\/   - key: Data will be saved and extracted using this key     \/\/\/   - defaultValue: This value will be substituted when there is no value     \/\/\/   - userDefaults: NSUserDefaults is a hierarchical persistent interprocess (optionally distributed) key-value store, optimized for storing user settings.     \/\/\/     \/\/\/ - Warning:     \/\/\/  If the type is not optional, default == nil will cause a crash.     public init(key: String, default defaultValue: T? = nil, userDefaults: UserDefaults = .standard) {         self.key = key         self.userDefaults = userDefaults         self.defaultValue = defaultValue     }      private func set(newValue: T) {         userDefaults.setValue(newValue, forKey: key)     } }  \/\/ MARK: - ActionUserDefault  extension UserDefaultsWrapper: ActionUserDefault {      public func removeObject() {         userDefaults.removeObject(forKey: key)          if let defaultValue = defaultValue {             self.set(newValue: defaultValue)         }     } }  \/\/ MARK: - Helper classes  private protocol AnyOptional {     var isNil: Bool { get } }  extension Optional: AnyOptional {     var isNil: Bool { self == nil } }  public protocol ActionUserDefault {     func removeObject() } <\/code><\/pre>\n
\u0418\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0435<\/h3>\n
\u041f\u0440\u0438\u043c\u0435\u0440 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u044f UserDefaultsWrapper<\/code> \u043c\u043e\u0436\u0435\u0442 \u0432\u044b\u0433\u043b\u044f\u0434\u0435\u0442\u044c \u0442\u0430\u043a:<\/p>\n
class User {        @UserDefaultsWrapper<String>(key: \"FirstName\", default: \"John\") var firstName     @UserDefaultsWrapper(key: \"LastName\", default: \"John\") var lastName: String       @UserDefaultsWrapper(key: \"Age\") var age: Int?     @UserDefaultsWrapper(key: \"Old\", default: 6) var old: Int? }<\/code><\/pre>\n
\u0417\u0434\u0435\u0441\u044c firstName<\/code>, lastName<\/code> , Age<\/code> \u0438 Old<\/code>  \u2013 \u044d\u0442\u043e \u0441\u0432\u043e\u0439\u0441\u0442\u0432\u0430, \u043a\u043e\u0442\u043e\u0440\u044b\u0435 \u0430\u0432\u0442\u043e\u043c\u0430\u0442\u0438\u0447\u0435\u0441\u043a\u0438 \u0441\u043e\u0445\u0440\u0430\u043d\u044f\u044e\u0442 \u0441\u0432\u043e\u0438 \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u044f \u0432 UserDefaults<\/code> \u0438 \u0438\u0437\u0432\u043b\u0435\u043a\u0430\u044e\u0442 \u0438\u0445 \u043e\u0442\u0442\u0443\u0434\u0430.<\/p>\n
UserDefaultsWrapper<\/code> \u0442\u0430\u043a\u0436\u0435 \u0432\u043a\u043b\u044e\u0447\u0430\u0435\u0442 \u0432 \u0441\u0435\u0431\u044f \u043c\u0435\u0442\u043e\u0434 removeObject()<\/code>, \u043a\u043e\u0442\u043e\u0440\u044b\u0439 \u0443\u0434\u0430\u043b\u044f\u0435\u0442 \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u0435 \u0438\u0437 UserDefaults<\/code> \u0438, \u043f\u0440\u0438 \u043d\u0430\u043b\u0438\u0447\u0438\u0438, \u0432\u043e\u0437\u0432\u0440\u0430\u0449\u0430\u0435\u0442 \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u0435 \u043f\u043e \u0443\u043c\u043e\u043b\u0447\u0430\u043d\u0438\u044e.<\/p>\n
$user.firstName.removeObject()<\/code><\/pre>\n
\u041f\u0440\u0435\u0438\u043c\u0443\u0449\u0435\u0441\u0442\u0432\u0430 \u0438 \u041f\u0440\u0438\u043c\u0435\u043d\u0435\u043d\u0438\u0435<\/h3>\n
UserDefaultsWrapper<\/code>  \u0443\u043f\u0440\u043e\u0449\u0430\u0435\u0442 \u0438 \u0434\u0435\u043b\u0430\u0435\u0442 \u0431\u043e\u043b\u0435\u0435 \u0431\u0435\u0437\u043e\u043f\u0430\u0441\u043d\u044b\u043c \u0440\u0430\u0431\u043e\u0442\u0443 \u0441 UserDefaults<\/code>. \u041e\u043d \u0443\u043c\u0435\u043d\u044c\u0448\u0430\u0435\u0442 \u043f\u043e\u0432\u0442\u043e\u0440\u044f\u044e\u0449\u0438\u0439\u0441\u044f \u043a\u043e\u0434 \u0438 \u043f\u0440\u0435\u0434\u043e\u0442\u0432\u0440\u0430\u0449\u0430\u0435\u0442 \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u044b\u0435 \u043e\u0448\u0438\u0431\u043a\u0438, \u0441\u0432\u044f\u0437\u0430\u043d\u043d\u044b\u0435 \u0441 \u043d\u0435\u043f\u0440\u0430\u0432\u0438\u043b\u044c\u043d\u044b\u043c \u043a\u043b\u044e\u0447\u043e\u043c  \u043f\u0440\u0438 \u0441\u043e\u0445\u0440\u0430\u043d\u0435\u043d\u0438\u0438 \u0438 \u0438\u0437\u0432\u043b\u0435\u0447\u0435\u043d\u0438\u0438 \u0434\u0430\u043d\u043d\u044b\u0445. \u0418\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u044f \u044d\u0442\u043e\u0442 \u043f\u043e\u0434\u0445\u043e\u0434, \u0432\u044b \u043c\u043e\u0436\u0435\u0442\u0435 \u0443\u043b\u0443\u0447\u0448\u0438\u0442\u044c \u0441\u0442\u0440\u0443\u043a\u0442\u0443\u0440\u0443 \u0438 \u0447\u0438\u0442\u0430\u0435\u043c\u043e\u0441\u0442\u044c \u0432\u0430\u0448\u0435\u0433\u043e \u043a\u043e\u0434\u0430.<\/p>\n
\u0415\u0449\u0435 \u0441\u0442\u0430\u0442\u044c\u0438 Swift Utilities:<\/h3>\n