CODEWITHSUNDEEP
iphoneobjective-c
Craig
Craig

Reputation: 16339

error with import <cocoa/cocoa.h>

I added class files from another project to my new iPhone Window for the first time. The class is a simple class that defines a polygon, and subclasses NSObject. As part of the standard template for an Objective C class, this class definition imports Cocoa.h

#import <Cocoa/Cocoa.h>

However, just by adding this class, I'm getting an error that 

Cocoa/Cocoa.h:No such file or directory.

I don't understand this because the exact same line occurs in another class definition (the controller) within the same project.

Upvotes: 8

Views: 16372

Answers (5)

sam_smith
sam_smith

Reputation: 6093

I had this problem occur when I accidentally overwrote the testApp-Prefix.pch code.

This then deleted the code adding #import (as mentioned above)

Once I noticed and undid the error disappeared

Upvotes: 0

heMac
heMac

Reputation: 1539

Project Target->"Build Settings"->"Base SDK", then select "Latest OS X(OS X 10.x)"

Upvotes: 0

nojetlag
nojetlag

Reputation: 753

This can happen when you generate a NSManagedObject subclass out of your datamodel (in an iPhone project), I assume in later versions of XCode this will be fixed.

Upvotes: 1

Chris Lundie
Chris Lundie

Reputation: 6023

On the iPhone you generally use UIKit instead of Cocoa, which is for Mac OS X.

#import <UIKit/UIKit.h>

You might import just the Foundation framework in a model class that doesn't reference any user interface stuff.

#import <Foundation/Foundation.h>

Upvotes: 7

Craig Otis
Craig Otis

Reputation: 32104

Subclasses of NSObject (at least on the iPhone) do not import the Cocoa.h header. Instead, they import Foundation.h:

#import <Foundation/Foundation.h>

Upvotes: 22

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