Auto Navigate to host App

I have a barcode scanning app with keyboard extension app. The keyboard has a button Barcode from which we can navigate to app for scanning the barcode. The keyboard can be used in app that can input text. Now after clicking the button and navigating to barcode scanning app, after successful completion of scanning isn't there a way to auto navigate to host application . At present, we are showing a pop up asking user to click on back button on top left corner.

Auto Navigate to host App
 
 
Q