1、問題

flutter項目在pubspec.yaml導入url_launcher包，然后點擊Pub get錯誤提示如下

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: flutter26 │ │     url_launcher: ^5.5.027 │ │ 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關鍵字沒有左對齊

?

?

?

?

?

3、解決辦法

讓cupertino_icons和url_launcher關鍵字左對齊，然后再點擊Pub get更新包就行

?

?