I am trying to register my application to show up in Safari\'s \"Open-in...\" dialog when a user clicks the share button on any html webpage.
I have added the
its , called extension , fist create a new project and than --> file ->new -> target -> application Extension -> ####
and select your required extension and done....
I know this is years later, but if anyone runs into this old question, as of IOS 8, Apple now allows app creators to make "extensions" which do allow you to add your app to the share menus.
Here is some documentation:
https://developer.apple.com/library/prerelease/ios/documentation/General/Conceptual/ExtensibilityPG/ExtensionScenarios.html
I fear what you want is not possible.
There is a difference between the Share dialog and the Open With dialog.
For the latter it's possible to register your app with document interaction, but the Share dialog only provides the native types (which Weibo is one of - see here: UIActivityViewController).
Also see this question on StackOverflow: is-it-possible-to-add-an-app-to-the-native-share-dialog