Method 'addPostFrameCallback' cannot be called on 'WidgetsBinding?' because it is potentially null.

dooboolab-community / flutter_calendar_carousel

Calendar widget for flutter that is swipeable horizontally. This widget can help you build your own calendar widget highly customizable.

MIT License

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Method 'addPostFrameCallback' cannot be called on 'WidgetsBinding?' because it is potentially null. #307

Closed Huangfuzhimin closed 2 years ago

Huangfuzhimin commented 2 years ago

Version of flutter_calendar_carousel 2.2.0

build failed

Doctor summary (to see all details, run flutter doctor -v): [✓] Flutter (Channel stable, 2.10.4, on macOS 12.0.1 21A559 darwin-x64, locale zh-Hans-CN) [✓] Android toolchain - develop for Android devices (Android SDK version 30.0.3) [✓] Xcode - develop for iOS and macOS (Xcode 13.4.1) [✓] Chrome - develop for the web [✓] Android Studio (version 2020.3) [✓] IntelliJ IDEA Community Edition (version 2021.1.2) [✓] VS Code (version 1.64.0) [✓] Connected device (3 available)

sernocturno commented 2 years ago

this works for me... on the file C:\src\flutter.pub-cache\hosted\pub.dartlang.org\flutter_calendar_carousel-2.2.0\lib\flutter_calendar_carousel.dart

on the line 326 make this change

-- headerTitle: headerText ?? widget.weekFormat ? '${_localeDate.format(_weeks[_pageNum].first)}' : '${_localeDate.format(_dates[_pageNum])}',

++ headerTitle: headerText ?? (widget.weekFormat ? '${_localeDate.format(_weeks[_pageNum].first)}' : '${_localeDate.format(_dates[_pageNum])}'),

arnoorani commented 2 years ago

Any solution for this yet? it's causing the build to fail on flutter flutter version: 2.8.1

arnoorani commented 2 years ago

Version of flutter_calendar_carousel 2.2.0

build failed

Doctor summary (to see all details, run flutter doctor -v): [✓] Flutter (Channel stable, 2.10.4, on macOS 12.0.1 21A559 darwin-x64, locale zh-Hans-CN) [✓] Android toolchain - develop for Android devices (Android SDK version 30.0.3) [✓] Xcode - develop for iOS and macOS (Xcode 13.4.1) [✓] Chrome - develop for the web [✓] Android Studio (version 2020.3) [✓] IntelliJ IDEA Community Edition (version 2021.1.2) [✓] VS Code (version 1.64.0) [✓] Connected device (3 available)

were you able to solve this issue?

zitob9 commented 2 years ago

i have the same problem

arnoorani commented 2 years ago

This worked for me.

replace flutter_calendar_carousel with the following::

flutter_calendar_carousel: git: url: https://github.com/dooboolab/flutter_calendar_carousel ref: 0fa27175b360af3549a12ac1cf612b15eb75a2a

Huangfuzhimin commented 2 years ago

I solved this problem :