How can I use CGImageProperties.h correctly on iOS 4+

Question

For my university project, I need to get various information about photography on the iOS platform to determine if the room where the user is located is in the right lighting conditions. The data I need includes ISO, exposure, brightness.

I noticed that these data values ​​are found as follows: CGImageProperties.h → kCGImagePropertyExifDictionary → kCGImagePropertyExifISOSpeedRatings

I do not have much formal experience in iOS development, so I was wondering if anyone had any additional documentation for this header file or sample code, even at the most basic level, which I can digest and learn how to use CGImageProperties.h , Thanks.

Answer 1

Add ImageIO to your application.

Then in your header file:

 #import <ImageIO/CGImageProperties.h>