Re: Upgrading NSDocument format, best practice

[Markus Spoettl]

On Sep 16, 2009, at 4:21 PM, I. Savant wrote:

Wow ... let me decipher this paragraph, which I obviously didn't proofread. :-D

When defining your document types (in the Info.plist file), you can designate a type as having an "Editor" role. This is typical. Unchecking this makes it a type your application will only read, but not save. If you uncheck the editor role for your old type, then add a new type that has the editor role, a save action on a document of the old type should trigger the Save As dialog, with the new format (as an editor role) selected.

Below is the relevant portion of my Info.plist

Any ideas?

I'm working with Xcode 3.2, my base SDK and deployment target is 10.5

Regards
Markus

                <dict>
                        <key>CFBundleTypeExtensions</key>
                        <array>
                                <string>myApp</string>
                        </array>
                        <key>CFBundleTypeIconFile</key>
                        <string>myApp-document-icon.icns</string>
                        <key>CFBundleTypeName</key>
                        <string>myApp Document</string>
                        <key>CFBundleTypeOSTypes</key>
                        <array>
                                <string>????</string>
                        </array>
                        <key>CFBundleTypeRole</key>
                        <string>Viewer</string>
                        <key>NSDocumentClass</key>
                        <string>MyAppLegacyDocument</string>
                        <key>NSPersistentStoreTypeKey</key>
                        <string>XML</string>
                </dict>
                <dict>
                        <key>CFBundleTypeExtensions</key>
                        <array>
                                <string>myApp2</string>
                        </array>
                        <key>CFBundleTypeIconFile</key>
                        <string>myApp-document-icon.icns</string>
                        <key>CFBundleTypeName</key>
                        <string>myApp 2 Document</string>
                        <key>CFBundleTypeOSTypes</key>
                        <array>
                                <string>????</string>
                        </array>
                        <key>CFBundleTypeRole</key>
                        <string>Editor</string>
                        <key>NSDocumentClass</key>
                        <string>MyAppDocument</string>
                        <key>NSPersistentStoreTypeKey</key>
                        <string>XML</string>
                </dict>

--
__________________________________________
Markus Spoettl

Hmm, I'm having unexpected problems getting this to work. It doesn't trigger the save-as behavior as expected, instead it just saves under the old extension - using the new format. I defined a second document type as a copy of the old, change the file extension (adding "2" at the end), even changed the document class of the old one to a sub-class of the original document class (because I suspected they can't be the same - turned out that wasn't it) and changed the old document's role to "Viewer".

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