---
title: "Objective-C | CoderPad"
description: "Learn more about Objective-C from CoderPad."
canonical: "https://coderpad.io/languages/objective-c/"
last_modified: "2023-06-06 06:04:47"
---
# Objective-C online IDE & code editor for technical interviews

Running Clang 6 with GNUstep and libobjc2 – IntelliSense is not available

### Experience the Objective-C IDE yourself

See just how easy and intuitive CoderPad Interview is to use below.

[Launch the environment](https://embed.coderpad.io/sandbox?question_id=247220&use_question_button)

## Guidelines to use Objective-C in this online IDE

While we don’t run Objective-C on native OSX, we do run it in the latest`clang`with`objc`. This lets you include classes like`NSString`and so forth largely as you normally would.

Your code is compiled with…

```
clang `gnustep-config --objc-flags` `gnustep-config --objc-libs` \
  -fobjc-arc -fobjc-nonfragile-abi -lobjc -lgnustep-base -ldispatch
Code language: Objective-C (objectivec)
```

…which activates automatic reference counting and the nonfragile ABI.

You should define an`int main()`function.

To use the linked implementation of Apple’s [Grand Central Dispatch](https://github.com/apple/swift-corelibs-libdispatch), call the appropriate`dispatch`methods:

```
#import <stdio.h>
#include <dispatch/dispatch.h>

static void timer_did_fire(void *context) {
    printf("Strawberry fields...\n");
}

int main (int argc, const char * argv[])
{
    dispatch_source_t timer = dispatch_source_create(
        DISPATCH_SOURCE_TYPE_TIMER, 0, 0, dispatch_get_main_queue());

    dispatch_source_set_event_handler_f(timer, timer_did_fire);
    dispatch_source_set_timer(timer, DISPATCH_TIME_NOW, 1 * NSEC_PER_SEC,
                              0.5 * NSEC_PER_SEC);
    dispatch_resume(timer);
    dispatch_main();
}Code language: Objective-C (objectivec)
```

## Need a better way to interview candidates?

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