In mail, for an attached custom filetype, I can bring up the "open in MyApp" option if I tap and hold, but most users will probably just tap and may not realize there is the tap and hold option. If I do a simple tap, it brings up a white screen with some sort of empty dark grey bar at the bottom if I scroll down.
I obviously want to get it to bring up an option to open it in my app or do something user-friendly.
The filetype icon is also very pixelated if i download a file type from the web in Safari on the screen where it shows the icon and "open in MyApp" button after I download it.
I have myex.png, myex@2x.png which are 22x29 and 44x58 and myex-large.png, myex-large@2x.png which are 88x116 and 176x232
I have this 'UTExportedTypeDeclarations' entry for example:
<dict>
<key>UTTypeConformsTo</key>
<array>
<string>com.mysite.myapp.myex</string>
<string>public.data</string>
</array>
<key>UTTypeDescription</key>
<string>MyApp Myex</string>
<key>UTTypeIdentifier</key>
<string>com.mysite.myapp.myex</string>
<key>UTTypeTagSpecification</key>
<dict>
<key>public.filename-extension</key>
<string>myex</string>
<key>public.mime-type</key>
<string>application/x-myapp-myex</string>
</dict>
<key>UTTypeReferenceURL</key>
<string>http://mysite.com/myex></string>
</dict>
and this 'CFBundleDocumentTypes' entry:
<dict>
<key>CFBundleTypeName</key>
<string>MyApp Myex</string>
<key>CFBundleTypeExtensions</key>
<array>
<string>myex</string>
</array>
<key>CFBundleTypeIconFiles</key>
<array>
<string>somedir/myex</string>
<string>somedir/myex-large</string>
<string>somedir/myex64</string>
<string>somedir/myex320</string>
</array>
<key>LSItemContentTypes</key>
<array>
<string>com.mysite.myapp.myex</string>
</array>
<key>LSHandlerRank</key>
<string>Owner</string>
<key>CFBundleTypeRole</key>
<string>Editor</string>
</dict>
