【swift|swift 获取当前viewcontroller （rootVC）】xcode 报错
whose view is not in the window hierarchy!
也就是你现在的Present的视图并不是Windows视图
///获取当前控制器
func currentVc() ->UIViewController{
var vc = UIApplication.shared.keyWindow?.rootViewControllerif (vc?.isKind(of: UITabBarController.self))! {
vc = (vc as! UITabBarController).selectedViewController
}else if (vc?.isKind(of: UINavigationController.self))!{
vc = (vc as! UINavigationController).visibleViewController
}else if ((vc?.presentedViewController) != nil){
vc =vc?.presentedViewController
}return vc!
}
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