Question

I have an iPhone app that I need to send to the background automatically. The app is defined with the VOIP key in its background modes so it should continue running when in background. I specifically need the app to keep running so calling exit(0) is no good.

The app will not be distributed via app store so using a private API is ok.

I have read about UIApplication terminate and UIApplication terminateWithSuccess but they don’t seem to be available anymore

Answer 1

Already answered quite well here:

Suspend the application

As that poster wrote:

Quitting your application or sending it to the background programmatically is a violation of the [iOS Human Interface Guidelines][1], which usually doesn’t bode well for getting through the review process:

Don’t Quit Programmatically

Never quit an iOS application
programmatically because people tend
to interpret this as a crash. However,
if external circumstances prevent your
application from functioning as
intended, you need to tell your users
about the situation and explain what
they can do about it. Depending on how
severe the application malfunction is,
you have two choices.

Display an attractive screen that describes the problem and suggests a
correction. A screen provides
feedback that reassures users that
there’s nothing wrong with your
application. It puts users in control,
letting them decide whether they want
to take corrective action and continue
using your application or press the
Home button and open a different
application

If only some of your application’s features are not working, display
either a screen or an alert when
people activate the feature. Display
the alert only when people try to
access the feature that isn’t
functioning.