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Is it possible to detect if my app is running and displaying on screen?
As we know, ios is supporting multi-task.
But I prefer to get the status if my app is running in front of all app and interact to users.
Welcome any comment
This flowchart will clarify how the management of the multitasking works in iOS 4.0+:
(taken from here)
What you need to do is just to manage a variable set by the various messages sent to your delegate, eg
applicationWillResignActiveorapplicationDidEnterBackground, in this way you can easily understand in which state is the application and behave accordingly.