CODEWITHSUNDEEP
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Cristian
Cristian

Reputation: 159

Error: The method 'FlatButton' isn't defined for the class 'PlatformButton'

im getting these errors and dont know how to fix them.

../AppData/Local/Pub/Cache/hosted/pub.dartlang.org/flutter_platform_widgets-1.20.0/lib/src/platform_button.dart:269:14: Error: The method 'FlatButton' isn't defined for the class 'PlatformButton'.
 - 'PlatformButton' is from 'package:flutter_platform_widgets/src/platform_button.dart' ('../AppData/Local/Pub/Cache/hosted/pub.dartlang.org/flutter_platform_widgets-1.20.0/lib/src/platform_button.dart').
Try correcting the name to the name of an existing method, or defining a method named 'FlatButton'.
      return FlatButton(
             ^^^^^^^^^^

../AppData/Local/Pub/Cache/hosted/pub.dartlang.org/flutter_platform_widgets-1.20.0/lib/src/platform_button.dart:302:12: Error: The method 'RaisedButton' isn't defined for the class 'PlatformButton'.
 - 'PlatformButton' is from 'package:flutter_platform_widgets/src/platform_button.dart' ('../AppData/Local/Pub/Cache/hosted/pub.dartlang.org/flutter_platform_widgets-1.20.0/lib/src/platform_button.dart').
Try correcting the name to the name of an existing method, or defining a method named 'RaisedButton'.
    return RaisedButton(
           ^^^^^^^^^^^^

../AppData/Local/Pub/Cache/hosted/pub.dartlang.org/flutter_platform_widgets-1.20.0/lib/src/platform_dialog_action.dart:171:14: Error: The method 'FlatButton' isn't defined for the class 'PlatformDialogAction'.
 - 'PlatformDialogAction' is from 'package:flutter_platform_widgets/src/platform_dialog_action.dart' ('../AppData/Local/Pub/Cache/hosted/pub.dartlang.org/flutter_platform_widgets-1.20.0/lib/src/platform_dialog_action.dart').
Try correcting the name to the name of an existing method, or defining a method named 'FlatButton'.
      return FlatButton(
             ^^^^^^^^^^

Upvotes: 15

Views: 32386

Answers (6)

Pawandeep Singh
Pawandeep Singh

Reputation: 397

If you're on the latest version of Flutter, Flatbutton is deprecated, use TextButton instead. You can see the documentation here

Upvotes: 30

Muhammad Ashir
Muhammad Ashir

Reputation: 456

As seen from Flutter Documentation: enter image description here

Old Widgets have been removed, Now you have to use the new widget along with the new theme. Here is a quick guide on how to use them.

Upvotes: 2

A. Rokbi
A. Rokbi

Reputation: 613

FlatButton is deprecated and totally removed from flutter after flutter 2.1.0 Use TextButton instead of FlatButton as follows:

TextButton(
              style: TextButton.styleFrom(
                foregroundColor: Colors.white,
                padding: const EdgeInsets.all(16.0),
                textStyle: const TextStyle(fontSize: 20),
              ),
              onPressed: () {},
              child: const Text('Gradient'),
            ),

Upvotes: 6

Tincharlie
Tincharlie

Reputation: 1

You just have to change the velocity_x:old version to new version. For Eg: in pubspec.yaml dependencies: velocity_x:^1.4.1 change it to ^3.2.1

Upvotes: 0

Rasathurai Karan
Rasathurai Karan

Reputation: 801

**Old Widget        change to    New Widget      
FlatButton   =>      TextButton      
RaisedButton =>      ElevatedButton  
OutlineButton =>    OutlinedButton**

for more details... https://docs.flutter.dev/release/breaking-changes/buttons#context

Upvotes: 18

Mohamed El-Gohary
Mohamed El-Gohary

Reputation: 41

Check the last package you added in pubspec.yaml and delete it and see if no error occurs then the error is because the package

Upvotes: 0

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