What should CFBuldneURLIconFile size be?

What should the size of the icon supplied for CFBuldneURLIconFile be?

I'm guessing 57x57 and that having an @2x version present will automatically be loaded where approp开发者_StackOverflow中文版riate, but can't find documentation anywhere (Googling 'CFBuldneURLIconFile' returns nothing!)

Do you mean CFBundleIconFile? (Must confess I've never heard of "CFBuldneURLIconFile" - where does this come from?)

Irrespective, there's an Apple Q&A document entitled "How are the icon files in my application bundle used on iPad and iPhone?" that lists all of the relevant icon sizes/default filenames, which should tell you what you need to know.

Irrespective, the default sizes/names are 57x57 ("Icon.png") for the non retina/iPad devices, 114x114 ("Icon@2x.png") for retina devices and 72x72 ("Icon-72.png") for the iPad, if that's relevant.

UPDATE

Think I might have found what you're after. The Information Property List Key Reference doc contains information about the CFBundleURLTypes, which states that it's effectively the URL equivalent of the CFBundleDocumentTypes. As such, you can presumably use the icon sizes it lists within that part of the documentation. (See the "Document Icons" section.)