我正在尝试检测用户何时按下退格键。我有一个 Package 在RawKeyboardListener中的TextField，它在Android上可以正常工作，但在iOS上似乎不起作用。我错过了什么？
在我的代码中，我试图检查检测到的按键是否等于logicalkeyboard.backspace或physicalkeyboard.backspace。我注意到iOS上没有检测到按键，所以看起来问题似乎是RawKeyboardListener无法检测到按键？

RawKeyboardListener(
                          focusNode: FocusNode(),
                          onKey: (key) {
                            setState(() {
                              print('stuff');
                              //LogicalKeyboardKey.backspace
                              if (Platform.isIOS) {
                                if (key.logicalKey == LogicalKeyboardKey.backspace) {
                                  print('this is working');
                                }
                              }
                              if (key.logicalKey == PhysicalKeyboardKey.backspace) {
                                detectDeleteKey = true;
                                // birthDateController.text.replaceRange(
                                //     birthDateController.text.length - 1, null, '');
                              }
                              else {
                                detectDeleteKey = false;
                              }
                            });
                        },
                          child: RegistrationFieldRow(
                            leftTextCapitalization: TextCapitalization.none,
                            leftTextInputType: TextInputType.number,
                            leftController: birthDateController,
                            leftOnChanged: (String value) {
                              setState(() {
                                birthDateResult = birthDateRuleValidation(
                                  birthDateController,
                                  10,
                                  value,
                                  {
                                    'numbersOnly': 'birthDateNumbersOnlyChar',
                                    'charValidationList': 'birthDateChars',
                                    'maxCharCount': 'birthDateMaxCharCount',
                                    'charCount': 'birthDateCharCount',
                                    'ageCheck': 'birthDateAgeVerification'
                                  },
                                  detectDeleteKey)!;

                                if (birthDateResult != '') {
                                  birthDateRuleCheck = true;
                                }
                                else {
                                  birthDateRuleCheck = false;
                                }
                              });
                            },
                            leftFieldPrefixIcon: const Icon(FontAwesomeIcons.calendarDay,
                            size: 15.0,
                            color: ePrimaryAccentColor,),
                            leftFieldHintText: 'Birth Date',
                            rightController: zipCodeController,
                            rightTextCapitalization: TextCapitalization.none,
                            rightTextInputType: TextInputType.number,
                            rightOnChanged: (String value) async {
                              locationDataAutoFill();
                            },
                            rightFieldPrefixIcon: const Icon(FontAwesomeIcons.globe,
                            size: 15.0,
                            color: ePrimaryAccentColor,),
                            rightFieldHintText: 'Zip Code',
                          ),
                        ),