TARGET_OS_IPHONE and ApplicationTests

Question

Why doesn't this code work when compiling an ApplicationTests unit test bundle?

#if TARGET_OS_IPHONE    #import <Foundation/Foundation.h>    #import <UIKit/UIKit.h> #else    #import <Cocoa/Cocoa.h> #endif 

One of my dependencies has this check and compiles just fine in my main application bundles, but it tries to load <Cocoa/Cocoa.h> when compiling my ApplicationTests bundle. It's probably just my lack of understanding of Xcode, but I get nervous when my test bundles don't build. Any suggestions?

Answer 1

You need to add

#include <TargetConditionals.h> 

source: https://opensource.apple.com/source/CarbonHeaders/CarbonHeaders-8A428/TargetConditionals.h.auto.html

Answer 2

The simplest solution is to move the #import <Foundation/Foundation.h> statement out if the #if condition and replace Cocoa with AppKit like this:

#import <Foundation/Foundation.h> #if TARGET_OS_IPHONE    #import <UIKit/UIKit.h> #else    #import <AppKit/AppKit.h> #endif 

The Foundation umbrella header imports the NSObjCRuntime header which in turn imports the TargetConditionals header.