title: user credential persistence in iPhone
body: <p>Since i'm new to iPhone programming, I want to do something like that: In the main screen of my app, i ask for username and password and authorize user using these info calling .net web service. In this main screen, there is a switch controller "Remember me" so that app will remember the user next time he run the app. My questions are:
  1. how can i call .net web services in iPhone?
  2. how can i persist these username and password information (like cookie in web app), so that user will not be asked for credential info?
  i would really appreciate, thanks.  </p>