Using CFBundleDocumentTypes: why does my app not show up in the "Share" menu?
ios, objective-c, xamarin.ios
Solution
Unfortunately this is not possible, because:
The share screen in Safari is using `UIActivityViewController` to display a number of activities that can be performed with the page. Those activities are defined in `UIActivity.h` and are usually the system-defined activities such as Post to Facebook, Post to Twitter, Message, Print, etc.
For an non-system defined activity to appear in that screen, one has to create a custom `UIActivity` subclass and then initialize the `UIActivityViewController` with an array of these.
The "Open In..." screen on the other hand looks similar but is using a `UIDocumentInteractionController` which displays apps that can open the given URL/UTI (don't Google UTI...)
Problem
I'm trying to register my app for all possible file types. I added the following to my info.plist: ``` <key>CFBundleDocumentTypes</key> <array> <dict> <key>CFBundleTypeName</key> <string>public.data</string> <key>LSItemContentTypes</key> <array> <string>public.data</string> <string>public.content</string> </array> </dict> </array> ``` If I now open a PDF in Safari and tap Safari's "Share" button, my app is not offered. However if I tap the PDF itself, a button "Open In" appears on top and there my app is listed. This is not a real problem but it prevents users to import photos into my app, because there is no "Open In" menu in the Photos app. Can I register for the "Share" menu too somehow?