问题
(New to Flutter/Dart/Android)
In console just did:
C:\Users\lordnull>flutter help clean
Delete the build/ directory.
Just wondering why we would want to delete a project's build directory (using "flutter clean")? Does it help cure some transient Flutter problem? If so what?
回答1:
The content of the build directory is updated incrementally depending on configuration or source changes for performance reasons because a full rebuild every time would take way too much time.
The dependencies can be quite complex and some changes don't invalidate all parts in build/ that need to be rebuilt after such changes.
This can lead to a corrupt build output.
flutter clean purges the build output and the next build action will rebuild everything from scratch.
That's not unique to Flutter. Most build systems offer such a clean step to ensure a build is not influenced by artifacts from previous build actions.
来源：https://stackoverflow.com/questions/53612454/why-would-i-want-to-delete-build-directory