如何解决 SchedulerBinding 问题？

Question

/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/get-4.6.1/lib/get_navigation/src/extension_navigation.dart:357:24: Warning: Operand of null-aware operation '!' has type 'SchedulerBinding' which excludes null.

• 'SchedulerBinding' 来自'package:flutter/src/scheduler/binding.dart' ('/C:/src/flutter/packages/flutter/lib/src/scheduler/binding.dart')。 SchedulerBinding.instance!.addPostFrameCallback((_) { ^ /C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/get-4.6.1/lib/get_navigation/src/extension_navigation.dart:468:24: 警告：空感知操作的操作数' ！'具有不包括 null 的类型“SchedulerBinding”。
• 'SchedulerBinding' 来自'package:flutter/src/scheduler/binding.dart' ('/C:/src/flutter/packages/flutter/lib/src/scheduler/binding.dart')。 SchedulerBinding.instance!.addPostFrameCallback((_) { ^ /C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/get-4.6.1/lib/get_navigation/src/snackbar/snackbar.dart:452:22: 警告：null-aware 操作数手术 '！'具有不包括 null 的类型“SchedulerBinding”。
• 'SchedulerBinding' 来自'package:flutter/src/scheduler/binding.dart' ('/C:/src/flutter/packages/flutter/lib/src/scheduler/binding.dart')。 SchedulerBinding.instance!.addPostFrameCallback( ^ /C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/get-4.6.1/lib/get_state_manager/src/rx_flutter/rx_disposable.dart:20:22：警告：null-aware 操作数手术 '？。'具有不包括 null 的类型“SchedulerBinding”。
• 'SchedulerBinding' 来自'package:flutter/src/scheduler/binding.dart' ('/C:/src/flutter/packages/flutter/lib/src/scheduler/binding.dart')。 SchedulerBinding.instance?.addPostFrameCallback((_) => onReady()); ^ /C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/get-4.6.1/lib/get_state_manager/src/rx_flutter/rx_notifier.dart:130:22: 警告：null-aware 的操作数手术 '？。'具有不包括 null 的类型“SchedulerBinding”。
• 'SchedulerBinding' 来自'package:flutter/src/scheduler/binding.dart' ('/C:/src/flutter/packages/flutter/lib/src/scheduler/binding.dart')。 SchedulerBinding.instance?.addPostFrameCallback((_) => onReady()); ^ /C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/get-4.6.1/lib/get_state_manager/src/simple/get_controllers.dart:90:20：警告：null-aware 操作数手术 '！'具有不包括 null 的类型“WidgetsBinding”。
• 'WidgetsBinding' 来自'package:flutter/src/widgets/binding.dart' ('/C:/src/flutter/packages/flutter/lib/src/widgets/binding.dart')。 WidgetsBinding.instance!.addObserver(this); ^ /C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/get-4.6.1/lib/get_state_manager/src/simple/get_controllers.dart:96:20：警告：空值感知操作数手术 '！'具有不包括 null 的类型“WidgetsBinding”。
• 'WidgetsBinding' 来自'package:flutter/src/widgets/binding.dart' ('/C:/src/flutter/packages/flutter/lib/src/widgets/binding.dart')。 WidgetsBinding.instance!.removeObserver(this); ^ /C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/get-4.6.1/lib/get_navigation/src/router_report.dart:53:22: 警告：空感知操作的操作数' ！'具有不包括 null 的类型“WidgetsBinding”。
• 'WidgetsBinding' 来自'package:flutter/src/widgets/binding.dart' ('/C:/src/flutter/packages/flutter/lib/src/widgets/binding.dart')。 WidgetsBinding.instance!.addPostFrameCallback((_) { ^

Answer 1

你可以将你的 flutter 升级到版本 3 并升级 Getx 打包到 4.6.5

Answer 2

运行 dart fix --apply 应该可以解决这个问题。

来源： https://github.com/flutter/flutter/issues/99272