Question on interchangeability of CFString and NSString ( both core foundation )

#1 · February 18, 2010, 12:38 pm

Posted by: fblistserve <fblistserve@...>

Hi Guys,

Apple docs tell us these are toll-free bridged, so where NSString is shown in a method call a CFString may be substituted and vice-versa. That I understand.

My question is: Can a CF function ( using CFStringCreateWithFormat as a point of discussion - but could be any CF call ) be used successfully in Objective-C code ( or code that is compiled with the Cocoa framework - i.e. #import <Cocoa/Cocoa.h> ) instead of the NSString method ( in this case stringWithFormat: )?

I'm hoping someone knows the answer without doing research ( because I can do that ). It seems that Cocoa often calls through to lower levels of Foundation code that are CF calls, so I thought CF calls might possibly be recognized ( and not reported as "undefined" by the compiler).

TIA....

Brian

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