Question

I have a separate thread running a function. The function will check if it can do something, and if not possible I want the program to inform the user and end.

I know about exit (0). I wasn’t sure if it works on all threads or only in main.

Is there a way I can end the program from a separate thread if a condition is not met?

Answer 1

You can use the singleton for NSThread

[[NSThread mainThread] exit]

Otherwise if you’re using Grand Central Dispatch you can access the main queue and fire it.

dispatch_async(dispatch_get_main_queue(), ^{
    exit(0);
});