iOS isKindOfClass

In Cocoa, almost all classes inherit from NSObject.

That means that NSObject is ‘the superclass’, and (almost) the rest of the classes are subclasses of NSObject.

isKindOfClass:

Returns a Boolean value that indicates whether the receiver is an instance of given class or an instance of any class that inherits from that class.

SwiftObjective C

if (element is UIImageView) {

}

or

let viewControllers: [UIViewController] = (self.navigationController?.viewControllers)! as [UIViewController];
    for aViewController:UIViewController in viewControllers {
        if aViewController.isKind(of: TestViewController.self) {
            print(aViewController)
            return //return for stop the loop
        }
    }

if ([element isKindOfClass: [UIImageView class]]) {

}

or

NSArray *viewControllers = [self.navigationController viewControllers];
    for (id aViewController in viewControllers) {
        if([aViewController isKindOfClass:[TestViewController class]]){
            print(aViewController)
            return;//return for stop the loop
        }
    }

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