johnluttig johnluttig - 5 months ago 111
Objective-C Question

Casting a CFDictionaryRef to NSDictionary?

I have the code (stripped down):

CFDictionaryRef *currentListingRef;
//declare currentListingRef here
NSDictionary *currentListing;
currentListing = (NSDictionary *) currentListingRef;


And then I get the error:


Cast of a non-Objective-C pointer type 'CFDictionaryRef *' (aka 'const
struct __CFDictionary **') to 'NSDictionary *' is disallowed with ARC


What am I doing wrong? How do I convert from a
CFDictionaryRef
to an
NSDictionary
?

Answer

ARC changed the way bridging works.

NSDictionary *original = [NSDictionary dictionaryWithObject:@"World" forKey:@"Hello"];
CFDictionaryRef dict = (__bridge CFDictionaryRef)original;
NSDictionary *andBack = (__bridge NSDictionary*)dict;
NSLog(@"%@", andBack);
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