title: Login / Logout on an iPhone app
body: <p>I would like to know about managing user's login and logout on IPhone native apps. For example, every time my app is running, the user must be logged in. The information the app serves and the list of users it's on a website running php+mysql.
  What's the "standard" procedure for this? Is there any library for handling user's login on a remote site?</p>
  
  <p>What solutions did you use? cookies? php sessions?</p>
  
  <p>Any help or link to useful website will be much appreciated.</p>