to return to the former page

hi everyone,

i have encounted a problem that is decribed:

i have two listview qml files.
A.qml (listview)
B.qml(listview)

in the main.qml, i use loader to switch bettwen the two lists.

now the loader.source is A.qml, then i switch to B.qml, and then i switch back to A.qml, how can i reserve the former postion in A.qml. that is to say, how can i return exactly, not just reload the a.qml?

Thanks