Flutter/Dart：库和文件有什么区别？

Question

When I code, I import my local files via the package... anotation. In flutter, there is no private, protected, public, but instead there is library privacy with the underscore _. When I import a local file, I can't access private members, therefore, a local file is library, right?

Answer 1

A single file is a library, but you can have multiple files be a library. Have a file that only imports other files in the library to make that the main library file. In a directory, usually the the main file is at the root and in a subdirectory is each part. There are many other ways to do it. I suggest just having all the code for the library in a single file.