[objective-c] How do I test which class an object is in Objective-C?

How do I test whether an object is an instance of a particular class in Objective-C? Let's say I want to see if object a is an instance of class b, or class c, how do I go about doing it?

If you want to check for a specific class then you can use

if([MyClass class] == [myClassObj class]) {
//your object is instance of MyClass
}

You also can use

NSString *className = [[myObject class] description]; 

on any NSObject

What means about isKindOfClass in Apple Documentation

Be careful when using this method on objects represented by a class cluster. Because of the nature of class clusters, the object you get back may not always be the type you expected. If you call a method that returns a class cluster, the exact type returned by the method is the best indicator of what you can do with that object. For example, if a method returns a pointer to an NSArray object, you should not use this method to see if the array is mutable, as shown in the following code:

// DO NOT DO THIS!
if ([myArray isKindOfClass:[NSMutableArray class]])
{
    // Modify the object
}

If you use such constructs in your code, you might think it is alright to modify an object that in reality should not be modified. Doing so might then create problems for other code that expected the object to remain unchanged.

You can also check run time. Put one breakpoint in code and inside (lldb) console write

(lldb) po [yourObject class]

Like this..

if you want to get the name of the class simply call:-

id yourObject= [AnotherClass returningObject];

NSString *className=[yourObject className];

NSLog(@"Class name is : %@",className);