Apple Help Tutorial

I found this great video on how to implements Help Book within your Mac applications. The guy uses XCode 3 but there is no really difference with Xcode 4.

Source : http://www.apeth.com/writersua/implementAppleHelp.mov

Geotagging JPEG with Core Foundation

I was searching a way to edit or add GPS metadata of JPEG files without using an external library inside a Mac Application. After looking on internet and reading the ImageIOKit documentation, I found an interesting post on the Apple Mailing List talking about this topic and an old bug related to it. It includes a code sample that is apparently working now (Mac Os X 10.8).  I just wanted to add some details about it :

• The values corresponding to the kCGImagePropertyGPSLatitudeRef/kCGImagePropertyGPSLongitudedRef keys are expected to be of type NSString.
• The values corresponding to the kCGImagePropertyGPSLatitude/kCGImagePropertyGPSLongitude keys are expected to be of type NSNumber.