title: controlling when app will refresh when returning from background
body: <p>This is a rather general question on what actually happens when an app returns from background. I have a user telling me that on opening my app that he has not used for over a day, he will still be shown the same view that he had before he closed the app (by "closed" I mean he just hit the home button to send it to background, NOT hold and then tap the cross button to kill the app completely).</p>
  
  <p>I was on the impression that if an app is restored from the background after a long time, it will be reloaded completely (showing splash screen and everything), as in the cases when I opened facebook or gmail app after I haven't used it for some time.</p>
  
  <p>So my question is, do I have to implement a check somewhere on the period of time passed since my app was sent to background and reset everything when it goes over a certain threshold, or is that supposed to be handled by iOS itself... and of course if a user sent my app to the background and return after 2 minutes I would not want to refresh</p>