title: Programmatically changing the iOS lock-screen
body: <p>I'm building an app which would have to have the ability to show my own views on the iPhone lock screen. I've seen lots of apps which let you customize the lockscreen and so forth and these were App Store apps so i'm guessing it has to possible. </p>
  
  <p>I just can't figure out what to use in the iOS SDK to even try implementing this.</p>
  
  <p>Oh and P.S: same goes for wallpapers—can we change this from inside our app?</p>