Edit application sandbox file in extension app

HI Team,


I am working on the document based app. I am attaching a file from iCould and saving into app sandbox.And i can able to see the preview using in the extenstion app. I want to edit this file and save back to my app. But I am not able to edit this file in extension app. It says "Read-only - you can't save changes to this file"


For example,

1. Open my app

2. Attaching .doc file from iCloud and saving into my app Libray folder

3. Opening the file in office word app

4. Edit and save in my app sandbox only


I would like to know if it is possible to let another iOS app open a file my app has attached and then the other app edits and saves it just in the original location (my application)?