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[英]Cannot run with sound null safety because dependencies vibration to nullsafety
[英]Error: Cannot run with sound null safety, because the following dependencies don't support null safety; in flutter
我做了一個BlocBuilder
,然后這個 package 不能與 null 安全datetime_picker_formfield
一起運行,我混淆了如何修復錯誤和解決錯誤,這是BlocBuilder
的全部代碼:
return BlocBuilder<InputFieldBloc, InputFieldBlocState>(
bloc: inputFieldBloc,
builder: (context, state) {
return DateTimeField(
format: DateFormat("dd-MM-yyyy"),
initialValue: state.value,
resetIcon: null,
onChanged: (value) {
inputFieldBloc.updateValue(value);
},
onShowPicker: (context, currentValue) async {
await showCupertinoModalPopup(
context: context,
builder: (context) {
return BottomSheet(
builder: (context) => Column(
mainAxisSize: MainAxisSize.min,
children: [
Container(
constraints: BoxConstraints(maxHeight: 200),
child: CupertinoDatePicker(
onDateTimeChanged: (value) {
inputFieldBloc.updateValue;
},
),
),
TextButton(onPressed: () => Navigator.pop(context), child:
Text('Ok')),
],
),
onClosing: () {},
);
});
//setState(() {});
return value;;
},
decoration: InputDecoration(
labelText: labelText,
prefixIcon: Icon(Icons.calendar_today),
border: OutlineInputBorder(),
),
);
}
);
包含從依賴項導入的代碼是return DateTimeField
任何人都可以解決並找到錯誤嗎? 如果您需要查看完整代碼,我需要您的幫助:
class CuppertinoDatePickerBlocBuilder extends StatelessWidget {
CuppertinoDatePickerBlocBuilder({
Key? key, required this.inputFieldBloc, required this.labelText,}) : super(key: key);
//var screen = MediaQuery.of(context).size;
DateTime value = DateTime.now();
final InputFieldBloc<DateTime?, dynamic> inputFieldBloc;
final String labelText;
@override
Widget build(BuildContext context) {
return BlocBuilder<InputFieldBloc, InputFieldBlocState>(
bloc: inputFieldBloc,
builder: (context, state) {
return DateTimeField(
format: DateFormat("dd-MM-yyyy"),
initialValue: state.value,
resetIcon: null,
onChanged: (value) {
inputFieldBloc.updateValue(value);
},
onShowPicker: (context, currentValue) async {
await showCupertinoModalPopup(
context: context,
builder: (context) {
return BottomSheet(
builder: (context) => Column(
mainAxisSize: MainAxisSize.min,
children: [
Container(
constraints: BoxConstraints(maxHeight: 200),
child: CupertinoDatePicker(
onDateTimeChanged: (value) {
inputFieldBloc.updateValue;
},
),
),
TextButton(onPressed: () => Navigator.pop(context), child: Text('Ok')),
],
),
onClosing: () {},
);
});
//setState(() {});
return value;;
},
decoration: InputDecoration(
labelText: labelText,
prefixIcon: Icon(Icons.calendar_today),
border: OutlineInputBorder(),
),
);
}
);
}
datetime_picker_formfield啟用了 null 安全。 看來您必須更新 pubspec.yaml 中的datetime_picker_formfield
pubspec.yaml
版本。
最新的 nulls datetime_picker_formfield 版本是 2.0.1
例子
dependencies:
datetime_picker_formfield: ^2.0.1
似乎您的 package 需要更新請確保在運行代碼時您的 package 應該更新
datetime_picker_formfield: ^2.0.1
如果您在代碼中遇到任何問題並且想要使用舊代碼,請在您的 pubspec yaml 中使用此 package,請點擊此命令
flutter 運行 --no-sound-null-safety
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