1、问题
flutter项目在pubspec.yaml导入url_launcher包，然后点击Pub get错误提示如下
F:\flutter_sdk\flutter\bin\flutter.bat --no-color pub get Running "flutter pub get" in flutter_1... Error on line 25, column 5 of pubspec.yaml: A dependency may only have one source. ╷ 25 │ ┌ sdk: flutter 26 │ │ url_launcher: ^5.5.0 27 │ │ 28 │ │ 29 │ │ # The following adds the Cupertino Icons font to your application. 30 │ │ # Use with the CupertinoIcons class for iOS style icons. 31 │ │ cupertino_icons: ^0.1.3 │ └──^ ╵ pub get failed (65; ╵) Process finished with exit code 65
2、分析
cupertino_icons和url_launcher关键字没有左对齐
3、解决办法
让cupertino_icons和url_launcher关键字左对齐，然后再点击Pub get更新包就行
