UIKit.h and Foundation.h in Objective-C -

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if import uikit.h automatically import foundation.h?

uikit.h doesn't explicitly include it, wouldn't surprised if 1 of other uikit headers does.

however, of files have anyway, because default pch (precompiled header, or header that's automatically added every file in project) comes this:

#ifdef __objc__     #import <foundation/foundation.h>     #import <uikit/uikit.h> #endif

this means every file in iphone app automatically have foundation , uikit imported.


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