Best Practice/Pattern for iphone login session

I need a recommendation on how to implement a login session for iphone + web service.

Do I generate a token and pass that token every time I mak开发者_StackOverflow中文版e a request to the web service?

1. Login
2. Get token

3. Send token to server with every request.

   • Token will expire in x-minutes

Would this be a common implementation?

please advise

That sounds like the basic idea. There are of course other options. The RestKit discussion board example does it pretty well:

https://github.com/RestKit/RestKit/tree/master/Examples/RKDiscussionBoardExample/DiscussionBoard