flutter pub get failed（1；因此，由于flutter_app取决于url_launcher ^ 5.7.7，版本解析失败。）

Question

-错误消息

The current Flutter SDK version is 1.20.3.
Because url_launcher >=5.7.7 <6.0.0-nullsafety depends on url_launcher_platform_interface >=1.0.9 <2.0.0-nullsaf


Because url_launcher >=5.7.7 <6.0.0-nullsafety depends on url_launcher_platform_interface >=1.0.9 <2.0.0-nullsaf
ety which requires Flutter SDK version >=1.22.0 <2.0.0, url_launcher >=5.7.7 <6.0.0-nullsafety is forbidden.
So, because flutter_app depends on url_launcher ^5.7.7, version solving failed.
Running "flutter pub get" in flutter_app...
pub get failed (1; So, because flutter_app depends on url_launcher ^5.7.7, version solving failed.)

-pubspec.yaml

version: 1.0.0+1

environment:
  sdk: ">=2.7.0 <3.0.0"

dependencies:
  flutter:
    sdk: flutter
  fl_chart: ^0.12.0
  url_launcher: ^5.7.7

我无法公开... 我怎么解决这个问题？？ 感谢您的阅读，我将等待您的建议！

Answer 1

请尝试以下。

-pubspec.yaml

version: 1.0.0+1

environment:
  sdk: ">=2.7.0 <3.0.0"

dependencies:
  flutter:
    sdk: flutter
  fl_chart: ^0.12.0
  url_launcher: ^6.0.0-nullsafety