Using UTIs to specify recognised document types

Discussion in 'Mac Programming' started by Nutter, Jun 9, 2007.

  1. Nutter macrumors 6502

    Mar 31, 2005
    London, England
    I am trying to set up my app so that it will accept audio files dropped on to the application icon. I'm stuck at the first step - specifying the document types that I want to accept in my Info.plist.

    As I understand it, I can use the UTI "" to avoid having to enumerate every single supported audio format. (I'm not concerned about backwards compatibility.) To this end, I've set up a document type in Xcode's target info window, like this:


    Xcode has added the following to my Info.plist file:
    Unfortunately this doesn't seem to work. I can't get my application to "darken" when I drag an audio file onto it. I have tried cleaning the project and rebuilding, but that doesn't help.

    I'm sure I'm missing something very simple, but I have no idea what. Apple's documentation on the subject isn't very helpful - the UTI documentation is quite sparse, and the documentation for setting up document types doesn't show how to use UTIs.

  2. Nutter thread starter macrumors 6502

    Mar 31, 2005
    London, England
    I spent ages grappling with this, before realising that my application was accepting drops properly in the finder, just not in the dock.

    After that I decided this was a bug and gave up trying to get it to work. I went on to add a second document type (public.folder). Lo and behold! Now the dock accepts both audio file and folder drops for my application!

    This was in 10.4.9.

    Conclusion: There may be a bug in 10.4 that stops the dock from accepting drops when you specify a single document type with a UTI.

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