使用 flutter_svg 包时如何修复此 nullOk 错误？

Question

我连接了包，将它添加到 main.dart，我尝试编译应用程序，但出现此错误。帮助！我该怎么办？

错误

Launching lib\main.dart on XT1562 in debug mode...
Running Gradle task 'assembleDebug'...
/D:/flutter/.pub-cache/hosted/pub.dartlang.org/flutter_svg-0.18.1/lib/src/picture_provider.dart:50:59: Error: No named parameter with the name 'nullOk'.
        context != null ? Localizations.localeOf(context, nullOk: true) : null,
                                                          ^^^^^^
/D:/flutter/packages/flutter/lib/src/widgets/localizations.dart:413:17: Context: Found this candidate, but the arguments don't match.
  static Locale localeOf(BuildContext context) {
                ^^^^^^^^


FAILURE: Build failed with an exception.

* Where:
Script 'D:\flutter\packages\flutter_tools\gradle\flutter.gradle' line: 991

* What went wrong:
Execution failed for task ':app:compileFlutterBuildDebug'.
> Process 'command 'D:\flutter\bin\flutter.bat'' finished with non-zero exit value 1

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.

* Get more help at https://help.gradle.org

BUILD FAILED in 15s
Exception: Gradle task assembleDebug failed with exit code 1

Answer 1

请按照以下步骤操作

1. 添加以下依赖项

  flutter_svg: ^0.20.0-nullsafety.3

2. 运行flutter clean命令
3. 运行flutter pub get命令
4. 运行flutter run命令或运行项目

Answer 2

每个人都是对的：放置flutter_svg: ^0.20.0-nullsafety.3or flutter_svg: ^0.19.3（以防您还不能迁移到空安全）是解决方案。我想补充一点：如果您使用的是依赖于 flutter_svg 的包，并且由于使用旧版本而仍然出现错误，您可以通过以下方式修复它：

dependency_overrides:
  flutter_svg: ^0.19.3

我失去了很多时间，因为该flags: ^3.2.2软件包正在使用flutter_svg: ^0.19.1并导致相同的错误。