由于 Firebase 错误，无法运行 flutter 代码

Question

Running "flutter pub get" in state_login...
Could not resolve URL "https://pub.dartlang.org".
pub get failed (server unavailable) -- attempting retry 8 in 64 seconds...
Could not resolve URL "https://pub.dartlang.org".
pub get failed (server unavailable) -- attempting retry 9 in 64 seconds...
Could not resolve URL "https://pub.dartlang.org".
pub get failed (server unavailable) -- attempting retry 10 in 64 seconds...
Because state_login depends on firebase_messaging ^20.0.1 which doesn't match any versions, version solving failed.
Running "flutter pub get" in state_login...
pub get failed (1; Because state_login depends on firebase_messaging ^20.0.1 which doesn't match any versions, version solving       
failed.)

Answer 1

检查 firebase_messaging 的版本。 最新版本是firebase_messaging: ^6.0.16告诉我它是否有效。