macOS Extract creator data from IPTC

[lopoz]

Hello,

I'm trying to extract specific creator data from the IPTC of an image, but not having a lot of luck..

I'm talking about the objects for the following keys:
kCGImagePropertyIPTCContactInfoAddress
kCGImagePropertyIPTCContactInfoCity
kCGImagePropertyIPTCProvinceState
kCGImagePropertyIPTCContactInfoPostalCode
etc. (basically the Creator Contact info from the IPTC)

This is my code:

CGImageSourceRef source = CGImageSourceCreateWithURL((CFURLRef) url, NULL);
NSDictionary *metadata = (NSDictionary *)CGImageSourceCopyPropertiesAtIndex(source, 0, NULL);

[[metadata objectForKey:(id)kCGImagePropertyIPTCDictionary] objectForKey:(id)kCGImagePropertyIPTCContactInfoAddress]
etc..

Unfortunately, this doesn't seem to work. When compiling, I get this error message:

  "_kCGImagePropertyIPTCContactInfoAddress", referenced from:
-[AppController getMetadata:] in AppController.o
ld: symbol(s) not found
collect2: ld returned 1 exit status

All other EXIF and IPTC data is fine..

Any help?

Thanks in advance!

 

[lopoz]

Okay, so I found out from the ImageIO header in the 10.6 SDK, that kCGImagePropertyIPTCDictionary contains kCGImagePropertyIPTCCreatorContactInfo and THAT contains these possible keys

CG_EXTERN const CFStringRef kCGImagePropertyIPTCContactInfoCity  __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_NA);
CG_EXTERN const CFStringRef kCGImagePropertyIPTCContactInfoCountry  __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_NA);
CG_EXTERN const CFStringRef kCGImagePropertyIPTCContactInfoAddress  __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_NA);
CG_EXTERN const CFStringRef kCGImagePropertyIPTCContactInfoPostalCode  __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_NA);
CG_EXTERN const CFStringRef kCGImagePropertyIPTCContactInfoStateProvince  __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_NA);
CG_EXTERN const CFStringRef kCGImagePropertyIPTCContactInfoEmails  __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_NA);
CG_EXTERN const CFStringRef kCGImagePropertyIPTCContactInfoPhones  __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_NA);
CG_EXTERN const CFStringRef kCGImagePropertyIPTCContactInfoWebURLs  __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_NA);

So now I'm trying to access them by calling e.g.:

[[[metadata objectForKey:(id)kCGImagePropertyIPTCDictionary] objectForKey:(id)kCGImagePropertyIPTCCreatorContactInfo] objectForKey:(id)kCGImagePropertyIPTCContactInfoCity]

But I'm presented with the same error.. And yes, I changed my base SDK to 10.6, since these keys are new in SL.

Any ideas?

 

[robbieduncan]

Have you included the ImageIO framework in your project? I don't think it's included as standard which would explain the linker errors...

 

[lopoz]

Have you included the ImageIO framework in your project? I don't think it's included as standard which would explain the linker errors...

Yes, I've linked the ApplicationServices.framework which includes the ImageIO framework (and imported the header file).