ios - Check if a subview is in a view using Swift -
how test if subview has been added parent view? if hasn't been added, want add it. otherwise, want remove it.
you can use uiview
method isdescendantofview
:
if mysubview.isdescendantofview(someparentview) { someparentview.mysubview.removefromsuperview() } else { someparentview.addsubview(mysubview) }
you may need surround if mysubview != nil
depending on implementation.
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