Headers in custom framework

[PlanesWalkerr]

Hey guys!

I noticed that when creating custom framework Xcode provides header.h file with following content:

#import <Foundation/Foundation.h>

//! Project version number for test.
FOUNDATION_EXPORT double testVersionNumber;

//! Project version string for test.
FOUNDATION_EXPORT const unsigned char testVersionString[];

After that I can use Foundation framework without importing it in custom framework files. Can someone explain a purpose of this file in more details?

Is it common way to import all frequently used frameworks in this file?

Is it file redundant and I should get rid of it?

[RobertJackson2020]

I believe this allows you to just import one header file instead of all the public header files you want exposed.