Skype update text contains next:
App auto restarts if unexpectedly shut down
How is possible to perform that via SDK?
as far as I know its not possible to restart your app .. you could kill your app using exit(1); but this is not allowed by Apple and will rejected. maybe you do some workaround by remove some views from the mainViewController and add it again and reset the data and content .. but making a real restart I don't think so.