objective c - How to return to my iphone application after call ends? -

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i able call iphone application using below code:

  nsstring *phonenumber = @"tel://1234567890";   [[uiapplication sharedapplication] openurl:[nsurl urlwithstring:phonenumber]];

now, want know how return application when call ends ?

as far i'm aware, such interaction impossible since application has been demoted background, , ui interaction has been delegated phone app, , user.


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