How can I programmatically determine if my app is running in the iphone simulator?

Question

As the question states, I would mainly like to know whether or not my code is running in the simulator, but would also be interested in knowing the specific iphone version that is running or being simulated.

EDIT: I added the word 'programmatically' to the question name. The point of my question is to be able to dynamically include / exclude code depending on which version / simulator is running, so I'd really be looking for something like a pre-processor directive that can provide me this info.

Answer 1

This code will tell you if you are running in a simulator.

#ifdef __i386__
NSLog(@"Running in the simulator");
#else
NSLog(@"Running on a device");
#endif

That could be problematic based on if some things on the platform change. This is also purported to work officially.

#if TARGET_IPHONE_SIMULATOR
NSString *hello = @”Hello, iPhone simulator!”;
#elif TARGET_OS_IPHONE
NSString *hello = @”Hello, device!”;
#else
NSString *hello = @”Hello, unknown target!”;
#endif

Answer 2

Already asked, but with a very different title.

http://stackoverflow.com/questions/146986/what-defines-are-setup-by-xcode-when-compiling-for-iphone

I'll repeat my answer from there:

It's in the SDK docs under "Compiling source code conditionally"

The relevant definitions are TARGET_OS_IPHONE and TARGET_IPHONE_SIMULATOR, which will be defined provided that you

#include "TargetConditionals.h"

Since that won't exist on non apple platforms, you can wrap your include like this

#ifdef __APPLE__
   #include "TargetConditionals.h"
#endif

before including that file

So, for example, if you want to check that you are running on device, you should do

#if !(TARGET_IPHONE_SIMULATOR)

Answer 3

I had the same problem, both TARGET_IPHONE_SIMULATOR and TARGET_OS_IPHONE are always defined, and are set to 1. Pete's solution works, of course, but if you ever happen to build on something other than intel (unlikely, but who knows), here's something that's safe as long as the iphone hardware doesn't change (so your code will always work for the iphones currently out there):

#if defined __arm__ || defined __thumb__
#undef TARGET_IPHONE_SIMULATOR
#define TARGET_OS_IPHONE
#else
#define TARGET_IPHONE_SIMULATOR 1
#undef TARGET_OS_IPHONE
#endif

Put that somewhere convenient, and then pretend that the TARGET_* constants were defined correctly.

Answer 4

Not pre-processor directive, but this was what I was looking for when i came to this question;

NSString *model= [[UIDevice currentDevice] model];
NSString *iPhoneSimulator = @”iPhone Simulator”;

if ([model compare:iPhoneSimulator] == NSOrderedSame){
//device is simulator
}