[shared_preferences] Handle Date type objects on iOS and macOS.

packages/go_router/example/pubspec.yaml

@@ -27,3 +27,8 @@ dev_dependencies:
 
 flutter:
   uses-material-design: true
+
+# FOR TESTING AND INITIAL REVIEW ONLY. DO NOT MERGE.
+# See https://github.com/flutter/flutter/wiki/Contributing-to-Plugins-and-Packages#changing-federated-plugins
+dependency_overrides:
+   {shared_preferences: {path: ../../shared_preferences/shared_preferences}}

packages/in_app_purchase/in_app_purchase/example/pubspec.yaml

@@ -30,3 +30,8 @@ dev_dependencies:
 
 flutter:
   uses-material-design: true
+
+# FOR TESTING AND INITIAL REVIEW ONLY. DO NOT MERGE.
+# See https://github.com/flutter/flutter/wiki/Contributing-to-Plugins-and-Packages#changing-federated-plugins
+dependency_overrides:
+   {shared_preferences: {path: ../../../shared_preferences/shared_preferences}}

packages/in_app_purchase/in_app_purchase_android/example/pubspec.yaml

@@ -29,3 +29,8 @@ dev_dependencies:
 
 flutter:
   uses-material-design: true
+
+# FOR TESTING AND INITIAL REVIEW ONLY. DO NOT MERGE.
+# See https://github.com/flutter/flutter/wiki/Contributing-to-Plugins-and-Packages#changing-federated-plugins
+dependency_overrides:
+   {shared_preferences: {path: ../../../shared_preferences/shared_preferences}}

packages/in_app_purchase/in_app_purchase_storekit/example/pubspec.yaml

@@ -29,3 +29,8 @@ dev_dependencies:
 
 flutter:
   uses-material-design: true
+
+# FOR TESTING AND INITIAL REVIEW ONLY. DO NOT MERGE.
+# See https://github.com/flutter/flutter/wiki/Contributing-to-Plugins-and-Packages#changing-federated-plugins
+dependency_overrides:
+   {shared_preferences: {path: ../../../shared_preferences/shared_preferences}}

packages/shared_preferences/shared_preferences/CHANGELOG.md

@@ -1,3 +1,7 @@
+## 2.1.3
+
+* Added handling of Date type objects on iOS in UserDefaults.
+
 ## 2.1.2
 
 * Fixes singleton initialization race condition introduced during NNBD

packages/shared_preferences/shared_preferences/README.md

@@ -101,6 +101,8 @@ If the prefix is set to a value such as `''` that causes it to read values that
 not originally stored by the `SharedPreferences`, initializing `SharedPreferences` 
 may fail if any of the values are of types that are not supported by `SharedPreferences`.
 
+On iOS/macOS if UserDefaults include Date type objects, they are converted into timestamps.
+
 If you decide to remove the prefix entirely, you can still access previously created
 preferences by manually adding the previous prefix `flutter.` to the beginning of 
 the preference key.

packages/shared_preferences/shared_preferences/example/pubspec.yaml

@@ -28,3 +28,8 @@ dev_dependencies:
 
 flutter:
   uses-material-design: true
+
+# FOR TESTING AND INITIAL REVIEW ONLY. DO NOT MERGE.
+# See https://github.com/flutter/flutter/wiki/Contributing-to-Plugins-and-Packages#changing-federated-plugins
+dependency_overrides:
+   {shared_preferences: {path: ../../../shared_preferences/shared_preferences}, shared_preferences_foundation: {path: ../../../shared_preferences/shared_preferences_foundation}}

packages/shared_preferences/shared_preferences/pubspec.yaml

@@ -3,7 +3,7 @@ description: Flutter plugin for reading and writing simple key-value pairs.
   Wraps NSUserDefaults on iOS and SharedPreferences on Android.
 repository: https://github.com/flutter/packages/tree/main/packages/shared_preferences/shared_preferences
 issue_tracker: https://github.com/flutter/flutter/issues?q=is%3Aissue+is%3Aopen+label%3A%22p%3A+shared_preferences%22
-version: 2.1.2
+version: 2.1.3
 
 environment:
   sdk: ">=2.18.0 <4.0.0"
@@ -42,3 +42,8 @@ dev_dependencies:
     sdk: flutter
   integration_test:
     sdk: flutter
+
+# FOR TESTING AND INITIAL REVIEW ONLY. DO NOT MERGE.
+# See https://github.com/flutter/flutter/wiki/Contributing-to-Plugins-and-Packages#changing-federated-plugins
+dependency_overrides:
+   {shared_preferences_foundation: {path: ../../shared_preferences/shared_preferences_foundation}}

packages/shared_preferences/shared_preferences_foundation/CHANGELOG.md

@@ -3,6 +3,10 @@
 * Updates minimum supported macOS version to 10.14.
 * Updates minimum supported SDK version to Flutter 3.3/Dart 2.18.
 
+## 2.2.3
+
+* Added handling of Date type objects on iOS in UserDefaults.
+
 ## 2.2.2
 
 * Updates minimum iOS version to 11.

packages/shared_preferences/shared_preferences_foundation/darwin/Classes/SharedPreferencesPlugin.swift

@@ -5,25 +5,26 @@
 import Foundation
 
 #if os(iOS)
-import Flutter
+  import Flutter
 #elseif os(macOS)
-import FlutterMacOS
+  import FlutterMacOS
 #endif
 
 public class SharedPreferencesPlugin: NSObject, FlutterPlugin, UserDefaultsApi {
   public static func register(with registrar: FlutterPluginRegistrar) {
     let instance = SharedPreferencesPlugin()
     // Workaround for https://github.com/flutter/flutter/issues/118103.
-#if os(iOS)
-    let messenger = registrar.messenger()
-#else
-    let messenger = registrar.messenger
-#endif
+    #if os(iOS)
+      let messenger = registrar.messenger()
+    #else
+      let messenger = registrar.messenger
+    #endif
     UserDefaultsApiSetup.setUp(binaryMessenger: messenger, api: instance)
   }
 
-  func getAllWithPrefix(prefix: String) -> [String? : Any?] {
-    return getAllPrefs(prefix: prefix)
+  func getAllWithPrefix(prefix: String) -> [String?: Any?] {
+    let prefs = getAllPrefs(prefix: prefix)
+    return convertDates(prefs)
   }
 
   func setBool(key: String, value: Bool) {
@@ -61,4 +62,27 @@ public class SharedPreferencesPlugin: NSObject, FlutterPlugin, UserDefaultsApi {
     }
     return filteredPrefs
   }
+
+  /// Recursively convert all Date type objects into timestamp.
+  private func convertDates<T>(_ value: T) -> T {
+    var result: Any
+    if value is Date {
+      result = Int((value as! Date).timeIntervalSince1970)
+    } else if value is [String: Any] {
+      var dict: [String: Any] = [:]
+      for (k, v) in value as! [String: Any] {
+        dict[k] = convertDates(v) as Any
+      }
+      result = dict
+    } else if value is [Any] {
+      var list: [Any] = []
+      for v in value as! [Any] {
+        list.append(convertDates(v))
+      }
+      result = list
+    } else {
+      result = value
+    }
+    return result as! T
+  }
 }

packages/shared_preferences/shared_preferences_foundation/example/pubspec.yaml

@@ -28,3 +28,8 @@ dev_dependencies:
 
 flutter:
   uses-material-design: true
+
+# FOR TESTING AND INITIAL REVIEW ONLY. DO NOT MERGE.
+# See https://github.com/flutter/flutter/wiki/Contributing-to-Plugins-and-Packages#changing-federated-plugins
+dependency_overrides:
+   {shared_preferences_foundation: {path: ../../../shared_preferences/shared_preferences_foundation}}

packages/shared_preferences/shared_preferences_foundation/pubspec.yaml

@@ -2,7 +2,7 @@ name: shared_preferences_foundation
 description: iOS and macOS implementation of the shared_preferences plugin.
 repository: https://github.com/flutter/packages/tree/main/packages/shared_preferences/shared_preferences_foundation
 issue_tracker: https://github.com/flutter/flutter/issues?q=is%3Aissue+is%3Aopen+label%3A%22p%3A+shared_preferences%22
-version: 2.2.2
+version: 2.2.3
 
 environment:
   sdk: ">=2.18.0 <4.0.0"