Notification that popup window is closed on IOS

[Devoo]

Hi,
We have new IOS with popup windows.
Great, but my application is broken now, because resume signal (applicationDidBecomeActive) is not triggered.
How do I get a notification that a pop-up window is closed?
I don't have access to popup window code, because it is a framework.

Have You any idea?

btw.
I have overwritten QIOSViewController(ViewController) and ApplicationDelegate, so I have full access to UIViewController methods and QIOSApplicationDelegate callbacks.

New controller is created by using:

DPDotPayViewController* dotPayViewController = [[DPDotPayViewController alloc] initWithPaymentChannelList:channelList paymentDetails:paymentDetails];
dotPayViewController.useLastChannelSelection = NO;
dotPayViewController.paymentControllerDelegate = self;
[self presentViewController:dotPayViewController animated:NO completion:NULL];

[Devoo]

I just overwritten the class defintion and gained access to private methods.