Objective-C dynamic_cast?

Is there an Objective-C equivalent of C++'s dynamic_cast?

It can be faked using this:

MyClass *safeObject = [object isKindOfClass: [MyClass class]]
                      ? (MyClass *)originalObject : nil;

But this is a lot of code to type, even if I don't need to type it often.

I am a bit rusty so this might not be quite right, but I believe the equivalent in C++ would be:

MyClass safeObject = dynamic_cast<MyClass>(orginalObject);

The context here is a block where the parameter is defined as a type of a more generic class, but in this block I "know" it's a specific subclass. Nevertheless, I don't want to just cast it blindly with (MyClass *)originalObject and ignore a theoretically possible error.

To be clear, while I'd love a dynamic_cast, I'd be happy with an alternate approach to safely handle this case as well.