how to create session (iPhone)?

How do you log the use开发者_运维技巧r in, create and store the user's session?

(It will timeout on its own aswell? do you need to store it in a database?)

Use NSUserDefaults. Set their values when session starts [for some events like login etc] and erase them when you want to end the session [for the events like logout or timeout].

if you need to hard store login data (Username/password) you shouldn't use NSUserDefaults. Keychain was created to do this (SFHFKeychainUnit).