flutter中没有名称为“null OK”的命名参数错误

Question

../../Developer/flutter/.pub-cache/hosted/pub.dartlang.org/flutter_neumorphic-3.0.3/lib/src/widget/app_bar.dart:147:57: Error: No named parameter with the name 'nullOk'.
    final ScaffoldState scaffold = Scaffold.of(context, nullOk: true);
                                                        ^^^^^^
../../Developer/flutter/packages/flutter/lib/src/material/scaffold.dart:1918:24: Context: Found this candidate, but the arguments don't match.
  static ScaffoldState of(BuildContext context) {
                       ^^
../../Developer/flutter/.pub-cache/hosted/pub.dartlang.org/neumorphic-0.4.0/lib/src/components/app_bar.dart:32:57: Error: No named parameter with the name 'nullOk'.
    final ScaffoldState scaffold = Scaffold.of(context, nullOk: true);
                                                        ^^^^^^
../../Developer/flutter/packages/flutter/lib/src/material/scaffold.dart:1918:24: Context: Found this candidate, but the arguments don't match.
  static ScaffoldState of(BuildContext context) {
                       ^^
../../Developer/flutter/.pub-cache/hosted/pub.dartlang.org/neumorphic-0.4.0/lib/src/components/text_field.dart:953:32: Error: No named parameter with the name 'nullOk'.
        MediaQuery.of(context, nullOk: true)?.navigationMode ??
                               ^^^^^^
../../Developer/flutter/packages/flutter/lib/src/widgets/media_query.dart:818:25: Context: Found this candidate, but the arguments don't match.
  static MediaQueryData of(BuildContext context) {
                        ^^
../../Developer/flutter/.pub-cache/hosted/pub.dartlang.org/neumorphic-0.4.0/lib/src/neumorphic/theme.dart:390:52: Error: No named parameter with the name 'nullOk'.
      _cupertinoOverrideTheme.resolveFrom(context, nullOk: nullOk),
                                                   ^^^^^^
../../Developer/flutter/.pub-cache/hosted/pub.dartlang.org/flutter_neumorphic-3.0.3/lib/src/widget/app_bar.dart:147:57: Error: No named parameter with the name 'nullOk'.
    final ScaffoldState scaffold = Scaffold.of(context, nullOk: true);
                                                        ^^^^^^
../../Developer/flutter/packages/flutter/lib/src/material/scaffold.dart:1918:24: Context: Found this candidate, but the arguments don't match.
  static ScaffoldState of(BuildContext context) {
                       ^^
../../Developer/flutter/.pub-cache/hosted/pub.dartlang.org/neumorphic-0.4.0/lib/src/components/app_bar.dart:32:57: Error: No named parameter with the name 'nullOk'.
    final ScaffoldState scaffold = Scaffold.of(context, nullOk: true);
                                                        ^^^^^^
../../Developer/flutter/packages/flutter/lib/src/material/scaffold.dart:1918:24: Context: Found this candidate, but the arguments don't match.
  static ScaffoldState of(BuildContext context) {
                       ^^
../../Developer/flutter/.pub-cache/hosted/pub.dartlang.org/neumorphic-0.4.0/lib/src/components/text_field.dart:953:32: Error: No named parameter with the name 'nullOk'.
        MediaQuery.of(context, nullOk: true)?.navigationMode ??
                               ^^^^^^
../../Developer/flutter/packages/flutter/lib/src/widgets/media_query.dart:818:25: Context: Found this candidate, but the arguments don't match.
  static MediaQueryData of(BuildContext context) {
                        ^^
../../Developer/flutter/.pub-cache/hosted/pub.dartlang.org/neumorphic-0.4.0/lib/src/neumorphic/theme.dart:390:52: Error: No named parameter with the name 'nullOk'.
      _cupertinoOverrideTheme.resolveFrom(context, nullOk: nullOk),


    Command PhaseScriptExecution failed with a nonzero exit code
    note: Using new build system
    note: Building targets in parallel
    note: Planning build
    note: Constructing build description

Could not build the precompiled application for the device.
                                                   ^^^^^^

name: Test


environment:
  sdk: ">=2.1.0 <3.0.0"

dependencies:
  rflutter_alert: ^1.0.3
  flutter:
    sdk: flutter
  mqtt_client: ^8.0.0
  provider: ^4.3.2+2
  get_it: ^5.0.1
  vibration: ^1.7.2
  clay_containers: ^0.2.2
  local_auth: ^0.6.2+1
  flutter_secure_storage: ^3.3.3
  neumorphic: ^0.4.0
  shared_preferences: ^0.5.8
  flutter_neumorphic: ^3.0.3
  cupertino_icons: ^0.1.3

dev_dependencies:
  flutter_test:
    sdk: flutter


# For information on the generic Dart part of this file, see the
# following page: https://dart.dev/tools/pub/pubspec

# The following section is specific to Flutter.
flutter:
  uses-material-design: true
  assets:
    - images/homestadelogo.png
    - images/morning.png
  fonts:
    - family: OpenSans
      fonts:
        - asset: fonts/assets/fonts/OpenSans.ttf
    - family: myLamp
      fonts:
        - asset: fonts/assets/fonts/mylamp.ttf

Answer 1

一些nullok参数已被移除，作为空安全性后迁移的一部分。您可以阅读更多关于相应的设计文档及其即将发布的迁移指南的内容。

您可以尝试使用.maybeof(context)而不是.of(context,nullok：true）；

您可能必须更新您的依赖项才能使其工作。