app is not running, because of WidgetsBinding?.instance.addPostFrameCallback((_)

[guvanch-amangeldiyev]

Launching lib/main.dart on iPhone 13 in debug mode... lib/main.dart:1 Xcode build done. 13,1s Failed to build iOS app Error output from Xcode build: ↳ objc[9671]: Class AMSupportURLConnectionDelegate is implemented in both /usr/lib/libauthinstall.dylib (0x1e5f16b90) and /Library/Apple/System/Library/PrivateFrameworks/MobileDevice.framework/Versions/A/MobileDevice (0x103e882c8). One of the two will be used. Which one is undefined. objc[9671]: Class AMSupportURLSession is implemented in both /usr/lib/libauthinstall.dylib (0x1e5f16be0) and /Library/Apple/System/Library/PrivateFrameworks/MobileDevice.framework/Versions/A/MobileDevice (0x103e88318). One of the two will be used. Which one is undefined. BUILD FAILED Xcode's output: ↳ Writing result bundle at path: /var/folders/_q/9swcthyx13l07kyknkj99xc40000gn/T/flutter_tools.68NsIg/flutter_ios_build_temp_dir2Wtmw2/temporary_xcresult_bundle : Warning: The class 'WidgetsBinding' cannot be null. ../…/lib/linear_percentindicator.dart:162 Try replacing '?.' with '.' WidgetsBinding?.instance.addPostFrameCallback(() { ^^^^^^^^^^^^^^ : Error: Method 'addPostFrameCallback' cannot be called on 'WidgetsBinding?' because it is potentially null. ../…/lib/linear_percent_indicator.dart:162

• 'WidgetsBinding' is from 'package:flutter/src/widgets/binding.dart' ('../../Documents/flutter/packages/flutter/lib/src/widgets/binding.dart'). package:flutter/…/widgets/binding.dart:1 Try calling using ?. instead. WidgetsBinding?.instance.addPostFrameCallback((_) { ^^^^^^^^^^^^^^^^^^^^ Failed to package /Users/guvanch/flutter_projects/test_appbar_animation. Command PhaseScriptExecution failed with a nonzero exit code note: Using new build system note: Planning note: Build preparation complete note: Building targets in dependency order warning: Capabilities for Signing & Capabilities may not function correctly because its entitlements use a placeholder team ID. To resolve this, select a development team in the Runner editor. (in target 'Runner' from project 'Runner') Result bundle written to path: /var/folders/_q/9swcthyx13l07kyknkj99xc40000gn/T/flutter_tools.68NsIg/flutter_ios_build_temp_dir2Wtmw2/temporary_xcresult_bundle Could not build the application for the simulator. Error launching application on iPhone 13. Exited (sigterm)

lines ../…/lib/linear_percent_indicator.dart:162 ../…/lib/linear_percent_indicator.dart:162

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• No issues found!

[keitokusano]

Facing the same problem.

[diegoveloper]

Please see the closed issues.

On Sat, May 14, 2022, 5:51 AM keito @.***> wrote:

Facing the same problem.

— Reply to this email directly, view it on GitHub https://github.com/diegoveloper/flutter_percent_indicator/issues/164#issuecomment-1126690338, or unsubscribe https://github.com/notifications/unsubscribe-auth/ABFL3UGJ6ZON56NWNJPNCKLVJ6AT5ANCNFSM5V5MMNUA . You are receiving this because you are subscribed to this thread.Message ID: @.*** com>

[zky6628]

I temporarily solved the problem with version 4.0.1. 4.0.1 code :

WidgetsBinding.instance?.addPostFrameCallback((_) { if (mounted) { setState(() { _containerWidth = _containerKey.currentContext?.size?.width ?? 0.0; _containerHeight = _containerKey.currentContext?.size?.height ?? 0.0; if (_keyIndicator.currentContext != null) { _indicatorWidth = _keyIndicator.currentContext?.size?.width ?? 0.0; _indicatorHeight = _keyIndicator.currentContext?.size?.height ?? 0.0; } }); } });