Re: NSDictionary mutability test
Re: NSDictionary mutability test
- Subject: Re: NSDictionary mutability test
- From: "Michael Ash" <email@hidden>
- Date: Mon, 8 Dec 2008 14:59:04 -0500
On Mon, Dec 8, 2008 at 12:29 PM, Charles Steinman
<email@hidden> wrote:
> This is explained in the thread you referenced. All NSDictionary objects are instances of NSCFDictionary. Thus the only way to check if they are mutable through public API is to try mutating them and see if Cocoa throws a hissy fit.
You can use -classForCoder and that will give you either NSDictionary
or NSMutableDictionary. This is a public API but the result is not
documented to be useful in this manner, so don't use this in any
shipping app. (Although given the need for archives to remain
backwards compatible I would not expect it to ever change.) However it
could be handy for debugging purposes.
Mike
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