You can't, plain and simple.
The best you can do is generate a notification that the user would be able to ignore but which would bring you app back to the foreground if the user chose the interactive response.
Where can I find a simple examle ?
You can post notifications using two different APIs:
UILocalNotification, which has been around since iOS 4
User Notification framework, which is new in iOS 10
You recommend you look at the documentation for those APIs and then post back if you have specific questions.
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Quinn “The Eskimo!”
Apple Developer Relations, Developer Technical Support, Core OS/Hardware
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