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There's obviously something I don't understand about NSDate.
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There's obviously something I don't understand about NSDate.


  • Subject: There's obviously something I don't understand about NSDate.
  • From: G S <email@hidden>
  • Date: Sat, 17 Mar 2012 15:38:20 -0700

I have a member variable to hold an NSDate:

    NSDate* _firstBadAccuracyTime;

At some point, something happens and I set this value to "now":

    _firstBadAccuracyTime = [NSDate date];

On my next trip through this function, I calculate how long it has been
since I set this date:

    NSDate* now = [NSDate date];
    if([now timeIntervalSinceDate:_firstBadAccuracyTime] >
BAD_ACCURACY_TIME)

then CRASH: BAD ACCESS

_firstBadAccuracyTime still contains a valid address, but the object
must've been released.  Why?  If I add a retain where I assign it, the
crash doesn't happen.  I added autorelease, but then got a crash on
releasing an object I hadn't allocated (which makes me think it's already
autoreleased).

Thanks for any insight!

Gavin
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