title: On iPhone, how do you allow another app to keep running in the background while your app is running?
body: <p>For example, if I start a song in Pandora and then open Safari to browse the web the Pandora song will keep playing. However, if I start a song in Pandora and then open my app it kills the Pandora song. How do I let Pandora keep playing while my app is running?</p>