如何检查UIViewController是否属于objective c中的一个特定子类?

I want to be able to check the type of a UIViewController to see if it is of a certain type like this

我想要检查UIViewController的类型看看它是否是这样的类型

c code

c代码

if (typeof(instance1) == customUIViewController) 
{
  customUIViewController test = (customViewController)instance1;

  // do more stuff
}

6 个解决方案

#1

The isKindOfClass: method indicates whether an object is an instance of given class or an instance of a subclass of that class.

isKindOfClass:方法指示对象是给定类的实例还是该类的子类的实例。

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

If you want to check whether an object is an instance of a given class (but not an instance of a subclass of that class), use isMemberOfClass: instead.

如果您想检查对象是否是给定类的实例(但不是该类的子类的实例)，那么使用isMemberOfClass:代替。

#2

var someVC: UIViewController

if someVC is MyCustomVC {
    //code
}

#3

Swift version:

斯威夫特版本:

var someVC: UIViewController

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

#4

Try:

试一试:

[vc isKindOfClass:[CustomViewController class]];

#5

I just wanted to add in addition to this answer that if you're wanting to see if a view controller is of a certain type in a switch statement (in Swift) you can do it like this:

我想补充的是，如果你想知道一个视图控制器在switch语句(Swift)中是否是特定类型的你可以这样做:

var someVC: UIViewController?

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

#6

Swift 3.0 in latest, we have to add a self along with the class name or it will throw an error "Expected member name or constructor call after type name" the below code u can use for Swift 3 and above

在最新的Swift 3.0中，我们必须添加一个self和类名，否则它将抛出一个错误“预期的成员名或类型名后的构造函数调用”

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

#1