Kill App after Expire Date (Suicidal Code Redux)

/ Published in: Objective C
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Using a gcc predefined macro, __DATE__, the code can know for itself when it was compiled, and build in an expiration date based on that value.

The former code ( was not internationalised and might cause an issue when run outside of English speaking countries. This code resolves the locale issue.

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  1. // Based on original code by Daniel Jakult, based on an idea from Brian Cooke.
  2. #ifdef BETA // 4 week expiration
  3. #define EXPIREAFTERDAYS 28
  4. #endif
  7. NSString* compileDateString = [NSString stringWithUTF8String:__DATE__];
  8. NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
  9. [dateFormatter setFormatterBehavior:NSDateFormatterBehavior10_4];
  10. [dateFormatter setLocale:[[[NSLocale alloc] initWithLocaleIdentifier:@”en_US”]
  11. autorelease]];
  12. [dateFormatter setDateFormat:@"MMM dd yyyy"];
  13. NSDate *compileDate = [dateFormatter dateFromString:compileDateString];
  14. [dateFormatter release];
  15. NSDate *expireDate = [compileDate addTimeInterval:(60*60*24* EXPIREAFTERDAYS)];
  17. if ([expireDate earlierDate:[NSDate date]] == expireDate)
  18. {
  19. // Run an alert or whatever
  21. // Quit!
  22. [NSApp terminate:self];
  23. }
  24. #endif


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