Incorrect backgroundTimeRemaining value in applicationDidEnterBackground method

Question

I am working on a Objective C project on Xcode6 beta 2 running on an iOS8 device. I am printing the backgroundTimeRemaining in the method: applicationDidEnterBackground.

- (void)applicationDidEnterBackground:(UIApplication *)application
{
  NSLog:(@"Background time remaining %f seconds", application.backgroundTimeRemaining);
  NSLog:(@"Background time remaining %f seconds", application.backgroundTimeRemaining);
  NSLog:(@"Background time remaining %f seconds", application.backgroundTimeRemaining);
}

The results I received were:

179769313486231570814527423731704356798070567525844996598917476803157260780028538760589558632766878171540458953514382464234321326889464182768467546703537516986049910576551282076245490090389328944075868508455133942304583236903222948165808559332123348274797826204144723168738177180919299881250404026184124858368.000000 seconds

9.995252 seconds

9.991967 seconds

Why does it output this big value on the first log (1797693...) ?

Thanks

Answer 1

I found out a quick and dirty fix that seems to work. Make the thread sleep a bit before requesting applicationTimeRemaning:

- (void)applicationDidEnterBackground:(UIApplication *)application
{
  [NSThread sleepForTimeInterval:.01];
  NSLog:(@"Background time remaining %f seconds", application.backgroundTimeRemaining);
}

But this is obviously not an ideal solution.