Question

I would like to check whether an object (e.g. someObject) is assignable (cast-able) to a variable of another type (e.g. SpecifiedType). In Java, I can write:

someObject instanceof SpecifiedType 

A related question is finding whether the runtime type of an object is equal to a another type. In Java, I can write:

someObject.getClass().equals(SpecifiedType.class) 

How can this be done in Objective-C?

Answer 1

Try [myObject class] for returning the class of an object.

You can make exact comparisons with:

if ([myObject class] == [MyClass class]) 

but not by using directly MyClass identifier.

Similarily, you can find if the object is of a subclass of your class with:

if ([myObject isKindOfClass:[AnObject class]]) 

as suggested by Jon Skeet and zoul.