Distinction between private and fileprivate top-level classes

问题

In Swift 3, what exactly is the difference in access control between

private class Foo { }

and

fileprivate class Bar { }

assuming both are top-level classes, that is, they are placed directly into a file rather than nested in some other construct?

回答1:

There is no difference in your case. The only time that fileprivate differs from private is inside a class, struct, or protocol.

来源：https://stackoverflow.com/questions/43054774/distinction-between-private-and-fileprivate-top-level-classes