如何检查UIViewController是否属于目标c中的特定子类？

isKindOfClass:

if ([instance1 isKindOfClass:[CustomUIViewController class]]) {
    // code
}

isMemberOfClass:

var someVC: UIViewController

if someVC is MyCustomVC {
    //code
}

var someVC: UIViewController

if someVC.isKindOfClass(MyCustomVC) {
    //code
}

[vc isKindOfClass:[CustomViewController class]];

var someVC: UIViewController?

switch someVC {
    case is ViewController01: break
    case is ViewController02: break
    case is ViewController03: break
    default: break
}

  for viewController in viewControllers {
                            if viewController.isKind(of: OurViewController.self){
                                print("yes it is OurViewController")
                                self.navigationController?.popToViewController(viewController, animated: true)
                            }
                        }