How to know which view back from in the previous view?

As the title says.

In view B’s controller I use $ionicHistory.goBack() back to view A . In view A how to know which view back from?

From the ionic docs$ionicHistory/

Returns the view that was before the current view in the history stack. If the user navigated from View A to View B, then View A would be the back view, and View B would be the current view.

you can also use the viewHistroy() method to see more details on the full history stack

Thanks for your help.

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