我无法使用iOS的shared_preferences插件保存字符串。

Future<Map<String, dynamic>> login(String username, String password) async {
    Map<String, dynamic> data = await auth(username, password);

    final prefs = await SharedPreferences.getInstance();
    await prefs.setString('username', username);

在Android（模拟器和真实的设备）上，此代码运行良好。在iOS上，我遇到了一个例外：

A Dart VM Service on iPhone 14 Pro Max is available at:
http://127.0.0.1:61586/Rp0YW0x-ZBY=/
The Flutter DevTools debugger and profiler on iPhone 14 Pro Max is available at: http://127.0.0.1:9100?uri=http://127.0.0.1:61586/Rp0YW0x-ZBY=/
[VERBOSE-2: dart_vm_initializer.cc(41)] Unhandled Exception: type Map<Object?, Object?>' is not a subtype of type 'List<Object?>?' in type cast
#0
UserDefaultsApi.setValue (package:shared_preferences_foundation/messages.g.dart:95:59)
<asynchronous suspension>
#1
SharedPreferences Foundation.setValue (package:shared_preferences_foundation/shared_preferences_foundation.dart: 77:5)
<asynchronous suspension>
#2
UserProvider.login (package:vks_flutter_app/providers/user_provider.dart :32:5)
<asynchronous suspension>

我正在使用shared_preferences: ^2.1.1，XCode 14，Flutter 3.7.12