Re: Storing objects in NSMutableDictionary
Re: Storing objects in NSMutableDictionary
- Subject: Re: Storing objects in NSMutableDictionary
- From: Michael Ash <email@hidden>
- Date: Fri, 13 Aug 2010 18:42:57 -0400
On Fri, Aug 13, 2010 at 4:22 PM, Greg Parker <email@hidden> wrote:
> On Aug 13, 2010, at 1:09 PM, Geoffrey Holden wrote:
>> Is it possible to store a class object in NSMutableDictionary?
>
> Class objects cannot be used as dictionary keys, because NSDictionary copies its keys and class objects can't be copied. Class objects can be used as dictionary values.
This does not appear to be the case. From the NSObject docs:
copyWithZone:
Returns the receiver.
+ (id)copyWithZone:(NSZone *)zone
Return Value
The receiver.
Discussion
This method exists so class objects can be used in situations where
you need an object that conforms to the NSCopying protocol. For
example, this method lets you use a class object as a key to an
NSDictionary object. You should not override this method.
Mike
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