Have you called [[NSUserDefaults standardUserDefaults] 
registerDefaults:dictionaryObject] prior to any calls to setObject (and 
friends)?

--

Adam Younce
ayou...@ripcord.net

On Jun 24, 2010, at 10:10 PM, cocoa-dev-requ...@lists.apple.com wrote:

> On Jun 23, 2010, at 5:11 PM, Patrick William Walker wrote:
> 
>> NSUserDefaults *prefs = [NSUserDefaults standardUserDefaults];
>>      
>> [prefs setObject: @"120" forKey: @"Length"];
>>      
>> [prefs synchronize];
>> 
>> 
>> When the program is run in the iPhone simulator (v3.2, not using 4.0 yet), 
>> it just dies.  Nothing on the console log so I set a breakpoint and got a 
>> backtrace. It's pointing to the setObject: method call and it's generating 
>> an access exception.  If I comment out the setObject portion, it runs fine.
> 
> My only guess is that you have some other code elsewhere in the app that‚s 
> incorrectly calling -release on the shared NSUserDefaults instance, causing 
> it to be dealloced, so the next access to that object will crash. Take a 
> careful look at the other places in your code that use NSUserDefaults.
> 
> ˜Jens

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