Re: Bug in NSArrayController? (immutable instead of mutable dictionaries)
Re: Bug in NSArrayController? (immutable instead of mutable dictionaries)
- Subject: Re: Bug in NSArrayController? (immutable instead of mutable dictionaries)
- From: "M. Uli Kusterer" <email@hidden>
- Date: Fri, 22 Oct 2004 03:28:08 +0200
At 2:59 Uhr +0200 22.10.2004, Uli Zappe wrote:
4. The above only happens as long as appliesImmediately is set to
YES in NSUserDefaultsController. If it is set to NO,
NSUserDefaultsController always returns mutable dictionaries.
However, this is no workaround for the creation of new mutable
dictionaries, because as soon as as appliesImmediately is set back
to YES to enable saving the preference settings to disk,
NSUserDefaultsController sends an *immutable* dictionary to
NSArrayController, thus changing the mutable to an immutable
dictionary.
I'll file a bug report.
You'll very likely get back "behaves as designed". NSUserDefaults
uses CFPreferences under the hood, and the CFPreferences docs say (on
CFPreferencesCopyValue and all other functions that return objects
from the preferences):
Note that values returned from this function are immutable,
even if you have recently set the value using a mutable object.
according to
<
http://developer.apple.com/documentation/CoreFoundation/Reference/CFPreferencesUtils/Reference/FunctionGroupIndex.html#//apple_ref/doc/uid/20001450/F11065>
So, I think the only bug worth filing will probably be against the
docs, because the docs for NSUserDefaults -objectForKey: don't really
mention this at all.
--
Cheers,
M. Uli Kusterer
------------------------------------------------------------
"The Witnesses of TeachText are everywhere..."
http://www.zathras.de
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