Re: "Toll free bridged" types
Re: "Toll free bridged" types
- Subject: Re: "Toll free bridged" types
- From: "Clark S. Cox III" <email@hidden>
- Date: Thu, 9 Jan 2003 07:50:59 -0500
On Wednesday, Jan 8, 2003, at 21:25 US/Eastern, ryan wrote:
Hi,
I'm investigating the "toll free bridged" types in
CoreFoundation/Cocoa.
According to the documentation, certain types such as CFStringRef can
be
casted to NSString * without any problem.
The question is how far does this compatibility extend? From the
documentation I can surmise that the reference counting fields are the
same
in NSObject and CFTypes. But how far does that compatibility extend?
Is
the type systems similar? IE: If I do:
CFStringRef stringRef = CFStringCreate( ... ) ;
Id kindaString = (id) stringRef ;
Does 'kindaString' act like a NSString?
Yes, they are identical. Anything you can do to/with an NSString, you
can do to/with a CFStringRef, and the other way around.
for example:
NSString *nsString = (NSString*) CFStringCreate( ... );
NSArray nsArray = (NSArray*)CFArrayCreate(...);
NSLog(@"%@", nsString);
[nsArray addObject: nsString];
[nsString autorelease];
[nsArray release];
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