最佳答案
缩进在 YAML 中很重要
应该是
dpendencies:
flutter:
sdk: flutter
http: ^0.12.0+^ # indentation like `flutter:` above, not like `sdk: ...`
关于visual-studio - pubspec.yaml 第 17 行第 5 列错误 : A dependency may only have one source,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/54762738/