OSX Quicklook debugging

Question

I am writing a quicklook plugin for an MPO file.

The plugin isn't that much of a problem, but the problem is trying to debug it. Apples documentation says that to debug you use

qlmanage -r <filename>

And I have. However, none of my breakpoints are matched. I assume this is as it hasn't matched my quicklook plugin with the type. Using mdl (or mdimport) i get a filetype of dyn.ah62d4rv4ge8046dt. Using that I get nothing. I have played around with the info.plist, as I assume that is the problem, and I have looked at other plugins to fix that, but still no breakpoints hit and it is not using my code.

My (important parts of) info.plist currently looks like this:

<key>CFBundleDocumentTypes</key>
    <array>
        <dict>
            <key>CFBundleTypeRole</key>
            <string>QLGenerator</string>
            <key>LSItemContentTypes</key>
            <array>
                <string>dyn.ah62d4rv4ge8046dt</string>
            </array>
        </dict>
        <dict>
            <key>CFBundleTypeRole</key>
            <string>QLGenerator</string>
            <key>LSItemContentTypes</key>
            <array>
                <string>public.image.mpo</string>
            </array>
        </dict>
    </array>
...

    <key>UTImportedTypeDeclarations</key>
    <array>
        <dict>
            <key>UTTypeConformsTo</key>
            <array>
                <string>public.data</string>
                <string>public.image</string>
            </array>
            <key>UTTypeDescription</key>
            <string>MPO Image file</string>
            <key>UTTypeIconFile</key>
            <string>MPO</string>
            <key>UTTypeIdentifier</key>
            <string>public.image.mpo</string>
            <key>UTTypeTagSpecification</key>
            <dict>
                <key>public.filename-extension</key>
                <array>
                    <string>mpo</string>
                </array>
            </dict>
        </dict>
    </array>

Is there anything obviously that I am missing here, or any other reason that it is not executing my plugin?

Answer 1

Answering my own question, it will only debug something that is already in the /Library/QuickLook folder.

So now produced and available from here