override var supportedInterfaceOrientations: UIInterfaceOrientationMask

[babynonkeyxs]

if my baseNavigationController overwrite like this :

public override var supportedInterfaceOrientations: UIInterfaceOrientationMask {
return self.visibleViewController?.supportedInterfaceOrientations ?? .portrait
}

and your AlertController overwrite like this :

public override var supportedInterfaceOrientations: UIInterfaceOrientationMask {
return self.presentingViewController?.supportedInterfaceOrientations ?? super.supportedInterfaceOrientations
}

then visibleViewController of baseNavigationController isqual to SDCAlertController
and presentingViewController of AlertController isqual to baseNavigationController
circular reference

[sberrevoets]

I wouldn't use visibleViewController to determine the supported orientations, but rather topViewController. If that doesn't work, you'll have to check the class of visibleViewController first or keep a reference to the alert around and check that visibleViewController != alert.