flutter: error: type 'String' is not a subtype of type 'Encrypted' of 'encrypted'

Question

我正在使用：encrypt: ^3.2.0 我在 flutter 中使用 AES 加密，但是当我解密我的加密值时，它给了我这种类型的错误。

flutter: 错误：类型 'String' 不是 'encrypted'

类型 'Encrypted' 的子类型

Future<String> getEncryption(String text) async {
    String enc = '';

    final SharedPreferences strFamilyPass =
        await SharedPreferences.getInstance();
    strFamilyPass.getString('family');

    final String keys = await getKEY();
    final dynamic key = Key.fromUtf8(keys);
    final dynamic iv = IV.fromLength(16);
    final dynamic encrypter = Encrypter(AES(key));
    final String salt = await getSalt();
    enc = '$salt${encrypter.encrypt(text, iv: iv).base64}';
    print('encryption $enc');
    return enc;
  }

  Future<String> getDecryption(String text) async {
    String dec = '';
    final String keys = await getKEY();
    final dynamic key = Key.fromUtf8(keys);
    final dynamic iv = IV.fromLength(16);
    final encrypter = Encrypter(AES(key));
    final String salt = await getSalt();

    dec = '$salt${encrypter.decrypt(text, iv: iv)}';// it give's me error right here
    print('decy $dec');
    return dec;
  }

Answer 1

documentation 说了这一切：

String decrypt(Encrypted encrypted, {IV iv})

您将 String 传递给 Encrypted，并且 Encrypted 不是 String 的子类型。

Answer 2

var source = 'flutter app';
final decrypted = encrypter.decrypt64(source, iv: iv);