无法编译通过

[tang5011235]

Flutter (Channel unknown, 2.10.4, on Microsoft Windows [Version 10.0.22000.708], locale en-US)

报错

/C:/Users/tang5/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/sticky_and_expandable_list-1.1.0/lib/src/expandable_section_container.dart:170:31: Error: Method 'addPostFrameCallback' cannot be called on 'WidgetsBinding?' because it is potentially null.

• 'WidgetsBinding' is from 'package:flutter/src/widgets/binding.dart' ('/D:/soft/work/flutter/packages/flutter/lib/src/widgets/binding.dart').
  Try calling using ?. instead.
  WidgetsBinding.instance.addPostFrameCallback((timeStamp) {
  ^^^^^^^^^^^^^^^^^^^^
  /C:/Users/tang5/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/sticky_and_expandable_list-1.1.0/lib/src/sliver_expandable_list.dart:414:31: Error: Method 'addPostFrameCallback' cannot be called on 'WidgetsBinding?' because it is potentially null.
• 'WidgetsBinding' is from 'package:flutter/src/widgets/binding.dart' ('/D:/soft/work/flutter/packages/flutter/lib/src/widgets/binding.dart').
  Try calling using ?. instead.
  WidgetsBinding.instance.addPostFrameCallback((_) {
  ^^^^^^^^^^^^^^^^^^^^

FAILURE: Build failed with an exception.

[AIYO77]

Flutter (Channel unknown, 2.10.4, on Microsoft Windows [Version 10.0.22000.708], locale en-US)

报错

/C:/Users/tang5/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/sticky_and_expandable_list-1.1.0/lib/src/expandable_section_container.dart:170:31: Error: Method 'addPostFrameCallback' cannot be called on 'WidgetsBinding?' because it is potentially null.

• 'WidgetsBinding' is from 'package:flutter/src/widgets/binding.dart' ('/D:/soft/work/flutter/packages/flutter/lib/src/widgets/binding.dart').
  Try calling using ?. instead.
  WidgetsBinding.instance.addPostFrameCallback((timeStamp) {
  ^^^^^^^^^^^^^^^^^^^^
  /C:/Users/tang5/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/sticky_and_expandable_list-1.1.0/lib/src/sliver_expandable_list.dart:414:31: Error: Method 'addPostFrameCallback' cannot be called on 'WidgetsBinding?' because it is potentially null.
• 'WidgetsBinding' is from 'package:flutter/src/widgets/binding.dart' ('/D:/soft/work/flutter/packages/flutter/lib/src/widgets/binding.dart').
  Try calling using ?. instead.
  WidgetsBinding.instance.addPostFrameCallback((_) {
  ^^^^^^^^^^^^^^^^^^^^

FAILURE: Build failed with an exception.

Channel unknown ？？