Re: CFPropertyList and NSDictionary/CFDictionary
Re: CFPropertyList and NSDictionary/CFDictionary
- Subject: Re: CFPropertyList and NSDictionary/CFDictionary
- From: Chris Kane <email@hidden>
- Date: Sat, 20 Dec 2003 14:31:54 -0800
On Nov 28, 2003, at 11:21 AM, Christopher Corbell wrote:
Is there any toll-free way to get from a CFPropertyListRef to an
NSDictionary
(or CFDictionary) and back? I think I can probably use intermediate
NSData/CFDataRef to pass the raw XML data to and from a CFPropertyList
and
a corresponding NSData object, but this seems inelegant to me - it's
a non-toll-free bridge between two redundant implementations of roughly
the same functionality. It seems like everything that CFPropertyList
does
could have been added as a small extension to NSDictionary /
CFDictionary.
If the top-level CFPropertyListRef is a CFDictionaryRef, you can just
cast, and otherwise, no amount of going through XML machinery is going
to help.
You can verify the CFPropertyListRef you got is a CFDictionaryRef with
something like:
if (CFGetTypeID(plistRef) == CFDictionaryGetTypeID()) {
success ...
CFDictionaryRef myDict = (CFDictionaryRef)plistRef;
...
} else {
not a dictionary as expected ...
}
PLists which are dictionaries are a subset of all possible kinds of
CFDictionarys, so the casting is valid. A cast to NSDictionary would
also be valid for the same reason. The Cocoa equivalent to the
CFPropertyList stuff can be found in NSPropertyList.h in 10.2 and
later.
Chris Kane
Cocoa Frameworks, Apple
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