Swfit : Custom UTI (ie. Xojo Filetype)

1

I am trying to implement a SaveDialog (with filetypes) like this

Screen Shot 2022-09-30 at 5.01.28 PM
Screen Shot 2022-09-30 at 5.01.28 PM1520×784 155 KB

If I use “standard” extenstions it works just fine… .
But if I use “custom ones” I get a strange value “dyn.lsdkfjafajf”

Spent hours trying to figure it out , but all the examples are convoluted and complex

Anyone know how to create a SIMPLE UTI for Swift???
Don’t need icons or that… just the Extension and a Description

2

imported and exported doc types

if you peek in the Info.plist fo Xojo you’ll see numerous “document types” under the key CFBundleDocumentTypes

1 Like
3

Thanks… WOW lot of data… but I think I pared it down to the 60 lines or so I need…
gotta test… [flying blind]

4

WOO HOO! it worked

there seemed to be a bunch of redundant data (and maybe it is)… but it works

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
    <key>CFBundleDocumentTypes</key>
     <array>
        <dict>
           <key>CFBundleTypeName</key>
           <string>Rapid Studio Project</string>
           <key>CFBundleTypeIconFile</key>
           <string>RAPIDProject.icns</string>
           <key>CFBundleTypeOSTypes</key>
           <array>
              <string>Rapid</string>
           </array>
           <key>CFBundleTypeExtensions</key>
           <array>
              <string>rapid2022</string>
           </array>
           <key>LSItemContentTypes</key>
           <array>
              <string>com.sisemore.rapid2022</string>
           </array>
           <key>CFBundleTypeRole</key>
           <string>Editor</string>
        </dict>
     </array>
     <key>UTExportedTypeDeclarations</key>
     <array>
        <dict>
           <key>UTTypeIdentifier</key>
           <string>com.sisemore.rapid2022</string>
           <key>UTTypeConformsTo</key>
           <array>
              <string>public.data</string>
           </array>
           <key>UTTypeDescription</key>
           <string>Rapid Studio project</string>
           <key>UTTypeIconFile</key>
           <string>RAPIDProject.icns</string>
           <key>UTTypeTagSpecification</key>
           <dict>
              <key>public.filename-extension</key>
              <array>
              <string>rapid2022</string>
              </array>
              <key>com.apple.ostype</key>
              <array>
                 <string>rapid2022</string>
              </array>
           </dict>
        </dict>
     </array>
     <key>UTImportedTypeDeclarations</key>
	<array>
		<dict/>
	</array>
</dict>
</plist>
5

The docs have gotten much better since way back when I had to first implement this stuff for Cocoa apps

Back then it was guess at WTF apple even meant
Experiment
Rip apart some other apps plist
Test & try again

And I know I got some of it wrong
I think at one point I had it messed u and Xojo claimed all PDF documents or something like that
@samRowlands and I did a lot of poking prodding & commiserating about it then

6

IIRC, it was that UTI types were in the wrong sub. They should have been importable not exportable. I filed it as a bug with Apple, because it destroyed launchservices, Apple said “Not our problem”. I even wrote an app to clean up the mess.

7

Yeah I think that was it

That it was so easy for Xojo to claim every darned PDF as its own was amazing but …

8

It was a major embarrassment to me at the time, because my app ended up ruining launch services on my customers machines.

9

yeah …I recall … sadly :frowning:

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