Adding tag and ranking metaData to an image in objective-c

StackOverflow https://stackoverflow.com//questions/12652949

Question

How can I add a custom ranking and keywords to an image's metaData in objective-c? I have seen CGImageProperties_ reference in apple documentation but it does not have any key for the ranking and tagging.

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Solution

I would rather create my own class with CGImage inside and equipped with ranking and metadata dictionary

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