add file extension share for iOS app

[Matthias Rebbe]

Hi,

i don´t know if it is the correct expression in the topic.

I need the possibility to share an email attachment on iOS with my iOS app.
I want to be able to open a .txt file received by email on iOS with my installed app.
Is there a way to do this with LC. Do i have to edit the plist file manually after creating the iOS app? 
And how does the app then takes notice of the file when the app is opened?

Matthias