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Editorial Team
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Asked: 2026-05-27T06:48:30+00:00

I a new to Objective C and iphone development. I read somewhere that I

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I a new to Objective C and iphone development. I read somewhere that I need to import the header files of foundation framework in my files where I want to use them. But I saw a sample Iphone project which was using NSString, NSDate, NSArray etc but there was never a statement like #import Foundation.h or #import NSString.h or so.

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1 Answer

  1. Editorial Team

    look at the supporting files there will be a file yourprojectname-Prefix.pch open that up..

    there you will se something like…

    //
// Prefix header for all source files of the 'yourProject' target in the 'yourProject' project
//

#import <Availability.h>

#ifndef __IPHONE_3_0
#warning "This project uses features only available in iPhone SDK 3.0 and later."
#endif

#ifdef __OBJC__
    #import <UIKit/UIKit.h>
    #import <Foundation/Foundation.h>
#endif

    this is automatically added to your file.

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