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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
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For iOS Devices If Background refresh is greyed out in the ON position, go To Settings App - > General - > Background App Refresh - > Turn on the option for the system, and then you can turn on / off by app.
Background app refresh is a feature of iOS and Android that allows apps to update their content from the internet, even while you're not using them. In contrast, we say that apps use data in the foreground when you open them and use them yourself.
First, go to your project's settings and choose the Capabilities tab. You need to enable the Background Modes capability, then check the box marked Background Fetch. This modifies your app's Info. plist file to add the “fetch” background mode that enables all the following functionality.
At the same time, didReceiveMemoryWarning is invoked for the app. At this point, so that your app continues to run properly, the OS begins terminating apps in the background to free some memory. Once all background apps are terminated, if your app still needs more memory, the OS terminates your app.
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.
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