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kill app after expire date

/ 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.

For a internationalised version see: http://snipplr.com/view/7196/kill-app-after-expire-date-suicidal-code-redux/

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  1. // For a internationalised version
  2. // see: http://snipplr.com/view/7196/kill-app-after-expire-date-suicidal-code-redux/
  3.  
  4. // Two-week expiration
  5. #define EXPIREAFTERDAYS 14
  6.  
  7. #if EXPIREAFTERDAYS
  8.    // Idea from Brian Cooke.
  9.    NSString* nowString =
  10.       [NSString stringWithUTF8String:__DATE__];
  11.    NSCalendarDate* nowDate =
  12.       [NSCalendarDate dateWithNaturalLanguageString:nowString];
  13.    NSCalendarDate* expireDate =
  14.       [nowDate addTimeInterval:(60*60*24* EXPIREAFTERDAYS)];
  15.  
  16.    if ([expireDate earlierDate:[NSDate date]] == expireDate)
  17.    {
  18.       // Run an alert or whatever
  19.  
  20.       // Quit!
  21.       [NSApp terminate:self];
  22.    }
  23. #endif

URL: http://www.red-sweater.com/blog/371/suicidal-code

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