Is there best way to know page is pop to parent page or pushAsync to children page?
A page ---can navigation---> B page---- Can navigation ---> C page.
If I'm in page B now. So when OnDisappearing() called, how to know is pushAsync to C page or Pop to A page?
I want to Save B page's setting when Pop to A page.
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How to get navigation back button tapped event?
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