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I've already have an hybrid application for iPhone. It part in Objective C and part in HTML/Rails. I need to create an Objective C login page to user and pass and keep it in a text file so whenever user open the APP it pushes those infos to a URL and login the user automatically. If the password have been changed the user should be redirected to a new login page and on the next logon overwrites the txt file.
I have the APP to provide and be base to this development.