In C if we include #stdio.h we get some functions like printf, scanf. In the same way for Objective C what we should do to include NSLog,NSArray,… and where the definitions of these NSLog, NSArray are stored ? Please clarify my confusion.
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In C if we include #stdio.h we get some functions like printf, scanf. In the same way for Objective C what we should do to include NSLog,NSArray,… and where the definitions of these NSLog, NSArray are stored ? Please clarify my confusion.
Adding to what jib wrote: to use those functions, one puts a line
at the top of the source code. This corresponds to
#include <stdio.h>in the standard C.In OS X,
reads the header file at
FirstPart.frameworksomewhere in the framework search path (typically,/System/Library/Frameworks) and then theSecondPart.his looked up insideFirstPart.framework/Headers/. So, in the case of#import <Foundation/Foundation.h>, the file is at/System/Library/Frameworks/Foundation.framework/Headers/Foundation.h. Now, if you open that file, you see it just have lots of other#import‘s, as in :and the real definitions are in those files. In general, you shouldn’t import those individual headers, but should just import the main header (in this case
Foundation/Foundation.h); the compiler has an optimization which makes it faster that way.